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1/74 TDA7514 june 2005 1 features am/fm world tuner for car-radio integrated image rejection fm mixer integrated tuning pll variable-bandwith fm if filter (iss) fully integrated fm stereo decoder fully integrated fm/am noise blanker highly integrated audio processor 2 description the TDA7514 is a device for car-radio applications that combines full rf front-end functions with ad- vanced audio-proce ssing capabilities. as far as fm and am functions are concerned, the TDA7514 features front-end processing, including the digital tuning pll. if processing with demodu- lation and variable-bandwid th if filtering (iss), stop station and quality detection functions, fm stereo decoding by means of a fully integrated ad- justment-free dedicated pll and, finally, am and fm noise blanking (am noise blanking comprises one if nb as well as an audio nb). the fm stereo decoder and the noise blanking functions are realised entirely without external components. the fm front-end circuit features an image-rejection mixer that allows the simplification of the external preselection filter, and a very low noise level that allows getting rid of the external preamplifier with no loss in sensitivity. a 6 bit on- board adc makes a digitised version of the sme- ter available to the p via i 2 cbus. the audio processor section comprises input se- lectors for one stereo single-ended source, one stereo quasi-differential source and a mono differ- ential source. volume, loudness, tone (bass and treble), balance and fading controls are available with completely pop-free operation to drive four output channels. an additional input independent- ly mixable on each of the four outputs is provided for chime. a soft mute function and an rds mute function are included to handle source change as well as rds af search without abrupt changes in the audio level. most of the parameters in the front-end section are i 2 cbus-driven and therefore under the control of the car-radio maker. the i 2 cbus allows further- more the user to realise the full electric alignment of all the external coils. single-chip fm/am tuner with stereo decoder and audio processor rev. 1 fi gure 1. p ac k age table 1. order codes e- prefix indicates lead free package part number package e-TDA7514 tqfp80 e-TDA7514tr tqfp80 in tape & reel tqfp80
TDA7514 2/74 figure 2. block diagram gnd
3/74 TDA7514 table 2. pin description n pin function 1 vref5v 5v reference 2 tungnd tuner general ground 3 ammix1in+ am mix1 input 4 ammix1in- am mix1 input 5 amagc1tc am agc1 filter capacitor 6 amagc1iout am agc1 current output 7 amagc1vout am agc1 voltage output 8 fmmix1in+ fm mix1 input 9 rfgnd rf ground 10 fmmix1in- fm mix1 input 11 fmagctc fm agc detector time constant 12 fmagciout fm agc current output 13 gnd ground 14 fmadjout fm antenna filter adjustment 15 vcoc am/fm vco collector 16 oscgnd vco ground 17 vcob am/fm vco base 18 oscvcc vco supply (8v) 19 lfout pll loop filter output 20 lfref pll loop filter reference 21 lfinam pll am loop filter input 22 lfinfm pll fm loop filter input 23 lfhc pll loop filter high-current input 24 pllgnd pll back-end ground 25 pllvcc pll back-end supply 26 xtalg ref osc gate 27 xtald ref osc drain 28 diggnd digital ground 29 digvcc digital dirty supply (8v) 30 qualmpout/issbw multipath det output / iss bw indicator 31 qualacmpout multipath det / adjacent channel det output 32 isstc iss time constant 33 devtc deviation detector time constant 34 vref3v 3v reference 35 apgnd audio processor/stereo decoderground 36 apvcc audio processor/stereo decoder supply (8v) 37 outrr audio out 38 outrl audio out 39 outfr audio out 40 outfl audio out
TDA7514 4/74 41 chimein chime input 42 acrin ac coupling right input 43 acrout ac coupling right output 44 aclin ac coupling left input 45 aclout ac coupling left output 46 ph+ phone in + 47 ph- phone in - 48 pb_l tape in left 49 pb_r tape in right 50 auxr audio aux in right 51 auxcom audio aux in common 52 auxl audio aux in left 53 tunerin am audio/fm mpx input 54 tunerout am audio/fm mpx output 55 audiomute audio processor mute control 56 sd / ifcout / arsout am/fm station detect or output / if counter output / ars mpx output 57 sda i 2 c bus data 58 scl i 2 c bus clock 59 smeterout filtered / unfiltered smeter output 60 demgnd fm demodulator ground 61 amif2ampin am if2 amp input 62 smetertc am/fm smeter filtering capacitor 63 fmdemref fm demodulator reference capacitor 64 amif2ampref am if2 amp feedback capacitor 65 snctc snc detector time constant 66 amagc2tc am agc2 filter capacitor 67 ammix2out- am mix2 output 68 ammix2out+ am mix2 output 69 fmmix2in- fm mix2 input 70 fmmix2in+ fm mix2 input 71 fmifamp2out fm if1 amp2 output 72 fmifamp2in fm if1 amp2 input 73 tunvcc tuner general supply (8v) 74 fmifampref/amif2ref fm if1 amps reference capacitor/am if2 reference voltage 75 fmifamp1out fm if1 amp1 output 76 fmifamp1in/ammix2in fm if1 amp1 input/am mix2 in 77 if1gnd if1 ground 78 mix1out- am/fm mix1 output 79 mix1out+ am/fm mix1 output 80 if1vcc if1 supply (8v) table 2. pin description n pin function
5/74 TDA7514 3 electrical characteristcs 3.1 fm (vcc = 8.5v; t amb = 25c; vant,in= 60db load ; fc=98.1mhz; fdev = 40khz; fmod=1khz; if1amp1=25db; if1amp2=15db; filter @tuner out:iec_tuner+deemphasis=50 s, unless otherwise specified) table 3. symbol parameter test c ondition min typ max unit general (measured at audioprocessor output with de-emphasis and high cut active, iss set to 80 khz bw) us usable sensitivity s/n=40db 0 db v load snr signal to noise ratio 65 db ls limiting sensitivity -3db _point, softmute off -2.5 db v load thd total harmonic distortion fdev = 40khz 0.26 % fdev = 75khz 0.36 % vout output level @tunerout 243 mv rms isn interstation noise delta vout@rf off, soft mute off -8.5 db ifcs if counter sensitivity 0 db v load icctun dc supply current@tunvcc 80 ma iccmix1 dc supply current@ift1 5 ma iccif1 dc supply current@if1vcc 10 ma iccosc dc supply current@oscvcc 10 ma iccpll dc supply current@pllvcc 3 ma iccdig dc supply current@digvcc 7 ma iq mixer 1 rin input resistance differential 6 k ? vin input dc bias @pin 8, pin 10 2.3 v gm transconductance 17 ms iip3 input ip3 108 db v iqg iq gain adjustment -1 +1 % iqp iq phase adjustment -7 +8 c irr image rejection ratio without adjustment 30 db adjusted 42 db gvmix1 gain from input (single-ended) to ift1 out differential 22 db ift1 adjustment cift1min ift1 adjustment capacitor minimum between mix1out+ and mix1out- 2.3 pf
TDA7514 6/74 symbol parameter test c ondition min typ max unit cift1max ift1 adjustment capacitor maximum between mix1out+ and mix1out- 20.1 pf cift1step ift1 adju stment capacitor step between mix1out+ and mix1out- 1.3 pf rft adjustment vrftadjmin rft adjustment minimum @t6<0:7>=[00000000] tvin=3v 0.4 v vrftadjmax rft adjustment maximum @ t6<0:7>=[11111111] tvin=3v 5.9 v vrftadjstep rft adjustment step tvin=3v, vrftadjstep=tvin/128 23 mv vrft0 @ t6<0:7>=[11000001] tvin=3v 3v voutmax output voltage maximum vcc-0.4 8.1 v voutmin output voltage minimum 0.4 v wide band rf agc (input: fmmixer1in+ and fmmixer1in-) wagcspl lower threshold start (set 1) (?min? not used) level at fmmixer1in+ @v12=100mv ift1 primary is shorted and is connected to gnd with 56nf 66.8 db v wagcsph higher threshold start (set max) level at fmmix1in+ @v12=100mv ift1 primary is shorted and is connected to gnd with 56nf 83.5 db v wide band keying agc ( controlled by filtsmeter1ms ) wagck agc start (set 1) shif t shifted level of agc starting point at fmmix1in+ when vsmeter changes from vkey to vkey-450mv -12 db vkey vsmeter at keyed agc start when v12 changes to 90mv from 100mv (set 1) 1.71 v narrow band if agc (input: fmmixerout+ and fmmixer1out-) nagcspl lower threshold start (set 1) (?min? not used) level of if1 at fmmix1out+ @v12=100mv 90.2 db v nagcsph higher threshold start (set max) level of if1 at fmmix1out+ @v12=100mv wagc set to max 109 db v rf agc pin diode driver out ioutmin minimum agcoff 0.1 a ioutmax maximum agcon; total @330 @2.2k 10.1 8.8 1.35 ma ma ma table 3. (continued)
7/74 TDA7514 symbol parameter test c ondition min typ max unit fmif1amp1 and fmif1amp2 gv1min amp1 minimum gain source and load impedance: 330ohm. 19 db gv1max amp1 maximum gain source and load impedance: 330ohm. 25 db iip3a1 amp1 input-referred ip3 tbd db v rin1 input impedance of amp1 330 ? rout1 output impedance of amp1 330 ? gv2min amp2 minimum gain source and load impedance: 330ohm. 7db gv2max amp2 maximum gain source and load impedance: 330ohm. 15 db iip3a2 amp2 input-referred ip3 tbd db v rin2 input impedance of amp2 330 ? rout2 output impedance of amp2 330 ? fmmixer2 (output not accessible) gvmix2 gain (single-ended output) s ource impedance: 330ohm. 12.3 db rinmix2 input impedance 330 ? fmlimiter (450khz) (output not accessible) gvlim gain (to demod_in from fmmixer2out+) tbd db fm filtered smeter (mod:off , slider: 0) vfsm1 filtered smeter1 @fmmix2in=50dbv 1.44 v vfsm2 filtered smeter2 @fmmix2in=70dbv 2.47 v vfsm3 filtered smeter3 @fmmix2in=90dbv 3.96 v fsmr1 filtered smeter resistor t16<5>= 0 200 k fsmr2 filtered smeter resistor t16<5>= 1 21 m clvfsm clamped voltage 5 v tcsm1 time constant1 t16<5>= 0 10 ms tcsm2 time constant2 t16<5>= 1 0.9 s fm smeter slider slstep slider step 38 mv slmax maximum slider @vfsm=2.6v 1.16 v slmin minimum slider @vfsm=2.6v -1.18 v iss (intelligent sel ectivity system) filter fcenter center frequency 450 khz table 3. (continued)
TDA7514 8/74 symbol parameter test c ondition min typ max unit fc120bw3 fcenter=120khz, @-3db,bw @iss 120khz 120 khz fc120bw20 fcenter=120khz, @-20db,bw @iss 120khz 250 khz fc80bw3 fcenter=80khz, @-3db,bw @iss 80khz 80 khz fc80bw20 fcenter=80khz, @-20db,bw @iss 80khz 150 khz fc20bw3 fcenter=20khz, @-3db,bw @iss 20khz 25 khz fc20bw20 fcenter=20khz, @-20db,bw @iss 20khz 75 khz ? fmin fcenter fine adjust minimum -20 khz iss filter time constant ichal1 charge current low @weak adjacent 60 a ichah1 charge current high @weak adjacent 74 a ichal2 charge current low @strong adjacent 110 a ichah2 charge current high @strong adjacent 124 a idischal discharge current low 1 a idischahl discharge current high 15 a visstcl isstc low 0.1 v visstch isstc high 4.9 v iss filter switch threshold v120on threshold for iss120on 3 v v120off threshold for iss120off 1 v v80on threshold for iss80on 4 v v80off threshold for iss80off 2 v adjacent channel detector for iss (input: smeter unfiltered) fcenterac1 filter1 cutoff , t22<1:0>=00 hp(106khz)+hp(100khz) 130 khz fcenterac2 filter2 center, t22<1:0>=01 bp(100khz)+hp(144khz) 100 khz fcenterac3 filter3 center, t22<1:0>=10 bp(204khz)+bp(100khz) 177 khz fcenterac4 filter4 center, t22<1:0>=11 bp(100khz)+bp(144khz) 101 khz gacmin gain minimum 23 db gacmax gain maximum 29 db vacl output voltage low 3.0 v vach output voltage high 4.9 v vthacl threshold for weak adjacent low 3.25 v vthach threshold for weak adjacent high 3.95 v table 3. (continued)
9/74 TDA7514 symbol parameter test c ondition min typ max unit vthacstep threshold for weak adjacent step 100 mv ? acl differential vthreshold between weak and strong adjacent low 0mv ? ach differential vthreshold between weak and strong adjacent high 300 mv ? acstep differential vthreshold between weak and strong step 100 mv acdesen1 desens th1 vsmeter at starting desens 0.25 v acdesen2 desens th2 vsmeter at starting desens 0.83 v acdesen3 desens th3 vsmeter at starting desens 1.42 v acdesen4 desens th4 vsmeter at starting desens 2.0 v slop1 ? ac/ ? vsmeter1 t22<6:5>=00 -2.7 slop2 ? ac/ ? vsmeter2 t22<6:5>=01 -3.3 slop3 ? ac/ ? vsmeter3 t22<6:5>=10 -5 slop4 ? ac/ ? vsmeter4 t22<6:5>=11 -10 multipath channel detector for iss ( input: smeter unf iltered+buffer) fcentermp bpf center 19 khz qmp quality factor of bpf 8.5 filtgv1 gain1 of bpf t25<1:0>=00 -7 db filtgv2 gain2 of bpf t25<1:0>=01 4 db filtgv3 gain3 of bpf t25<1:0>=10 7 db filtgv4 gain4 of bpf t25<1:0>=11 10 db grect1 rectifier gain1 t25<3:2>=00 6 db grect2 rectifier gain2 t25<3:2>=01 12 db grect3 rectifier gain3 t25<3:2>=10 18 db grect4 rectifier gain4 t25<3:2>=11 22 db vmpl output voltage low 3.0 v vmph output voltage high 4.9 v vthmp1 threshold level1 3.49 v vthmp2 threshold level2 3.74 v vthmp3 threshold level3 4.06 v vthmp4 threshold level4 4.31 v deviation detector for iss (input: demodulator output) fcdev cutoff frequency of mpx lpf (2 nd order) 10 khz table 3. (continued)
TDA7514 10/74 symbol parameter test c ondition min typ max unit gvlpf gain of lpf 14 db idischarl discharge current low at devtc 6 a idischarh discharge current high at devtc 20 a idischarstep discharge current step at devtc 2 a vth1 low threshold1 15 khz dev vth2 low threshold2 20 khz dev vth3 low threshold3 28 khz dev vth4 low threshold4 44 khz dev rdev1 ratio of vthreshold between strong and high deviation vthhighdev/vthdev 1 rdev2 ratio of vthreshold between strong and high deviation vthhighdev/vthdev 1.3 rdev3 ratio of vthreshold between strong and high deviation vthhighdev/vthdev 1.4 rdev4 ratio of vthreshold between strong and high deviation vthhighdev/vthdev 1.5 devdesens1 offset1 for vsoftmute for desens referred to soft mute threshold 50 mv devdesens2 offset2 for vsoftmute for desens referred to soft mute threshold 150 mv field strength iss ( fsiss ) ? vthisissl low offset for vthsm of softmute by smeter(1ms) referred to soft mute threshold -467 mv ? vthisissh high offset for vthsm of softmute by smeter(1ms) referred to soft mute threshold +467 mv ? vthisissstep step offset for vthsm of softmute by smeter(1ms) 67 mv softmute by smeter vthsm1 threshold level1 t14<1:0>=00 0.3 v vthsm2 threshold level2 t14<1:0>=01 0.4 v vthsm3 threshold level3 t14<1:0>=10 1.6 v vthsm4 threshold level4 t14<1:0>=11 1.8 v attsmmax maximum attenuation 21.5 db attsmmin minimum attenuation 4.5 db attsmstep step attenuation 2.5 db table 3. (continued)
11/74 TDA7514 symbol parameter test c ondition min typ max unit softmute by adjacent channel detector vthsmac1 threshold level1 t14<2>=0 2.75 v vthsmac2 threshold level2 t14<2>=1 3.25 v attsmac1 attenuation1 t14<7:6>=00 0 db attsmac2 attenuation2 t14<7:6>=01 6 db attsmac3 attenuation3 t14<7:6>=10 9 db attsmac4 attenuation4 t14<7:6>=11 12 db station detector by smeter vsdl low output level @sdpin 0 v vsdh high output level @sdpin 5 v vthsdmin threshold level minimum t20<3:0>=0000 0.4 v vthsdmax threshold level maximum t20<3:0>=1111 3.4 v vthsdstep threshold level step 0.2 v adjacent channel detector for quality outputs, snc and hcc f1ac1 cutoff or center frequency of filter1 t8<4>=0 83 khz f1ac2 cutoff or center frequency of filter1 t8<4>=1 104 khz f2ac1 cutoff or center frequency of filter2 t8<5>=0 119 khz f2ac2 cutoff or center frequency of filter2 t8<5>=1 139 khz gcf2ac1 gain of filter2 t18<7>=0 8.7 db gcf2ac2 gain of filter2 t18<7>=1 14.7 db ? vrect1 offset1 of rectifier for snc&hcc t18<5:4>=00 0.4 v ? vrect2 offset2 of rectifier for snc&hcc t18<5:4>=01 0.8 v ? vrect3 offset3 of rectifier for snc&hcc t18<5:4>=10 1.2 v ? vrect4 offset4 of rectifier for snc&hcc t18<5:4>=11 1.6 v multipath detector for quality output, snc and hcc (filter sh ared with iss multipath detector) gvrectl rectifier gain minimum t15<7:5>=000 5 db gvrecth rectifier gain maximum t15<7:5>=111 13.4 db gvrectstep rectifier gain step 1.2 db table 3. (continued)
TDA7514 12/74 symbol parameter test c ondition min typ max unit smeter control for snc and hcc gvsml gain minimum t15<3:0>=000 0 db gvsmh gain maximum t15<3:0>=111 2.25 db gvsmstep gain step 0.15 db quality_acmpout (high output corresponds to good quality) gqacmp1mp gain output level1 for multipath t25<5:4>=01 -4 db gqacmp2mp gain output level2 for multipath t25<5:4>=10 0 db gqacmp3mp gain output level3 for multipath t25<5:4>=11 +4 db gqacmp4mp gain output level4 for multipath t25<5:4>=00 -60 db gqacmp1ac gain output level1 for adjacent channel t25<7:6>=01 -4 db gqacmp2ac gain output level2 for adjacent channel t25<7:6>=10 0 db gqacmp3ac gain output level3 for adjacent channel t25<7:6>=11 +4 db gqacmp4ac gain output level4 for adjacent channel t25<7:6>=00 -60 db vqacmpmax maximum output level 5.0 v vqacmpmin minimum output level 0 v quality_mpout (low output corresponds to good quality) vqacmax maximum output level 5 v vqacmin minimum output level 0.9 v roll off compensation for tunerout ? vc120 delta voltage between iss120 on and iss off @53khz 1 db ? vc80 delta voltage between iss80 on and iss off @53khz 1 db weather band audio gain boost gvwbbst boosted gain 23.5 db table 3. (continued)
13/74 TDA7514 3.2 am (vcc = 8.5v; tamb = 25c; vsg = 74db v emf ; fc = 999khz; modulation level = 30%, fmod = 400hz; 80o+20pf/65pf dummy antenna; filter@tunerout: iec_tuner + deemphasis = 50us, unless oth- erwise specified). table 4. symbol parameter test condition min typ max unit general (input level @sg emf) us usable sensitivity snr=20db 26 db v emf snr signal to noise ratio 50 db ms maximum sensitivity @ ? vout=-10db, softmute:off 20 db v emf thd1 total harmonic distortion1 mod=30%, vsg=74 dbv emf 0.1 % thd2 total harmonic distortion2 mod=80%, vsg=74 dbv emf 0.2 % thd3 total harmonic distortion3 mod=30%, vsg=120dbv emf 0.2 % thd4 total harmonic distortion4 mod=80%, vsg=120dbv emf 0.5 % thdlf thd @ low frequency mod=30%, fmod=100hz 0.2 % vout level of tunerout tunerout 370 mv rms isn interstation noise level vout @rf:off & softmute:off -35 db ifcs if counter sensitivity 10 db v emf icctun dc supply current@tunvcc 85 ma iccmix1 dc supply current@ift1 5 ma iccif1 dc supply current@if1vcc 10 ma iccmix2 dc supply current@ift2 2 ma iccosc dc supply current@oscvcc 8ma iccpll dc supply current@pllvcc 5 ma iccdig dc supply current@digvcc 10 ma mixer1 gv conversion gain from ammixer1in+ to ift1; secondary loaded with 330 3.5 db rin input resistance (differential) 1k ? iip3mix1 input-referred ip3 130 db v agc1 wide band agc (input: ammixer1in+ and ammixer1in-; feagc in open-loop configuration) wagcspl starting point minimum level at ammix1in+ @iagcout = 1a, rf=999khz, set=0 94.4 db v wagcsph starting point maximum level at ammix1in+ @iagcout = 1a, rf=999khz, set=31 115.5 db v
TDA7514 14/74 symbol parameter test condition min typ max unit agc1 narrow band agc (input: ammixer2in; feagc in open-loop configuration) nagcspl starting point minimum level at ammix2in @iagcout = 1a if1=10.7mhz, set=0 96.3 db v nagcsph starting point maximum level at ammix2in @iagcout = 1a if1=10.7mhz, set=31 117.0 db v agc1 ultra narrow band agc (input: amif2in+; feagc in open-loop configuration) unagcspl starting point minimum level at amif2in @iagcout =1ua if2=450khz, set=0 69.6 db v unagcsph starting point maximum level at amif2in @iagcout =1ua if2=450khz, set=15 76.9 db v agc1 output ioutl pindiode drive current minimum agcoff 1 a iouth pindiode drive current maximum agcon 0.4 ma voutl rfamp control voltage minimum agcon 0.5 v vouth rfamp control voltage maximum agcoff 3.5 v ragcvout output resistance at vout 17 k ? agc1 time constant ragc1tc1 time constant fast mode output resistance amagc1tcpin 9k ? ragc1tc2 time constant normal mode output resistance amagc1tcpin 100 k ? ammixer2 gmix2max conversion gain from ammixer2in to ift2 secondary loaded with 2k 8db iip3mix2 input-referred ip3 140 db v rmix2in input resistance 2.4 k ? amif2amplifier gif2ampmin min. gain , no agc2 t29<7:4>=0010 68 db gif2ampmax max. gain , no agc2 t29<7:4>=1111 82 db gif2amp agc2 range -40 db rif2ampin input resistance 2 k ? softmute by smeter vthsm1 threshold level1 t14<1:0>=00 0.3 v table 4. (continued)
15/74 TDA7514 symbol parameter test condition min typ max unit vthsm2 threshold level2 t14<1:0>=01 0.4 v vthsm3 threshold level3 t14<1:0>=10 1.6 v vthsm4 threshold level4 t14<1:0>=11 1.8 v attsmmax maximum attenuation 21.5 db attsmmin minimum attenuation 4.5 db attsmstep step attenuation 2.5 db am filtered smeter vfsm1 filtered smeter1 @amif2ampin=50db v0.8 v vfsm2 filtered smeter2 @amif2ampin=70db v2.2 v vfsm3 filtered smeter3 @amif2ampin=90db v4.4 v fsmr1 filtered smeter resistor t16<5>=0 200 k ? fsmr2 filtered smeter resistor t16<5>=1 21 m ? clvfsm clamped voltage 5 v tcsm1 time constant1 t16<5>=0 10 ms tcsm2 time constant2 t16<5>=1 0.9 s am smeter slider slstep slider step 40 mv slmax maximum slider @vfsm=2.6v 1.23 v slmin minimum slider @vfsm=2.6v -1.25 v am station detector by smeter vsdl low output level @sd pin 0 v vsdh high output level @sd pin 5 v vthsdmin threshold level minimum t29<3:0>=0000 0.3 v vthsdmax threshold level maximum t29<3:0>=1111 2.55 v vthsdstep threshold level step 0.15 v amagc2 time constant ragc2tc1 time constant fast mode output resistance amagc1tcpin 4.8 k ? ragc2tc2 time constant normal mode output resistance amagc1tcpin 150 k ? amifnb wgateifnb width of gate 12 sec voffset0 rectifier offset0 t31<3:0>=0000 0 mv voffset1 rectifier offset1 t31<3:0>=0001 46 mv voffset2 rectifier offset2 t31<3:0>=0010 100 mv voffset3 rectifier offset3 t31<3:0>=0011 146 mv table 4. (continued)
TDA7514 16/74 3.3 vco, pll and xtal oscillator table 5. symbol parameter test condition min typ max unit voffset4 rectifier offset4 t31<3:0>=0100 212 mv voffset5 rectifier offset5 t31<3:0>=0101 257 mv voffset6 rectifier offset6 t31<3:0>=0110 312 mv voffset7 rectifier offset7 t31<3:0>=0111 362 mv voffset8 rectifier offset8 t31<3:0>=1000 439 mv voffset9 rectifier offset9 t31<3:0>=1001 485 mv voffset10 rectifier of fset10 t31<3:0>=1010 541 mv voffset11 rectifier of fset11 t31<3:0>=1011 587 mv voffset12 rectifier of fset8 t31<3:0>=1100 653 mv voffset13 rectifier of fset9 t31<3:0>=1101 700 mv voffset14 rectifier of fset10 t31<3:0>=1110 755 mv voffset15 rectifier of fset11 t31<3:0>=1111 800 mv vdesens1 desens threshold1 t31<5:4>=00 4.4 v vdesens2 desens threshold2 t31<5:4>=01 2.65 v vdesens3 desens threshold3 t31<5:4>=10 1.8 v vdesens4 desens threshold4 t31<5:4>=11 1.4 v symbol parameter test condition min typ max unit vco fvcomin minimum vco frequency vcc=8.5v 155 mhz fvcomax maximum vco frequency vcc=8.5v 280 mhz vosc level of oscillation @200mhz, ( rf=89.3mhz ) vcob , impedance of active probe is 0.7pf//1m ? 105 db v loop filter output voltage vlpoutmin minimum lpout 0.05 v vlpoutmax maximum lpout vcc-0.05 8.45 v xtal oscillator vxtal oscillation level @xtald , with 3pf between xtald and xtalg, set to 11.25pf 123.5 db v fxtalmax adjustment range maximum +1.95 khz fxtalmin adjustment range minimum -1.60 khz fxtalstep adjustment range step 124 hz table 4. (continued)
17/74 TDA7514 3.4 stereodecoder standard conditions, unless otherwise indicated: fm: input at #tuner_in = 1 khz at 450 mvrms, input gain setting = 0.5 db, deemphasis = 75 s, roll off compensation se t to give maximum stereo separation ( note that this vari es with vsbl setting) am: input at #tuner_in = 1 khz at 1 vrms, input gain setting = 0.5 db table 6. symbol parameter test condition min. typ. max. unit v in mpx input level input gain = 3.5db 0.5 1.25 v rms rin input resistance (tunerin) fm 70 100 130 k ? am 30 k ? gain minimum input gain 0.5 db gmax maximum input gain 5.75 db g step step resolution 1.75 db a max channel separation 30 50 db svrr supply voltage ripple rejection vripple=100mv, f=1khz 35 55 db thd total harmonic distorti on fin=1khz, mono 0.02 0.3 % s+n n signal plus noise to noise ratio a-weighted, s=2vrms 80 91 db mono/stereo switch (with ingain=5.75db) v pthst1 pilot threshold voltage for stereo, pth=1 10 15 25 mv v pthst0 pilot threshold voltage for stereo, pth=0 15 25 35 mv v pthmo1 pilot threshold voltage for mono, pth=1 7 12 17 mv v pthmo0 pilot threshold voltage for mono, pth=0 10 19 25 mv pll ? f/f capture range 0.5 % deemphasis & highcut deempfm deemphasis time constants fm; v level >> vhch deemphasis=50 s, fm 25 50 75 s deemphasis=75 s, fm 50 75 100 s deempam deemphasis time constants am; v level >> vhch deemphasis=50 s, am 22.3 khz deemphasis=75 s, am 14.9 khz ref5v internal reference voltage 4.7 5 5.3 v carrier and harmonic suppresion at output 19 pilot signal f=19khz, deemphasis=75 s40 50 db 38 subcarrier f=38khz, deemphasis=75 s75 db 57 subcarrier f=57khz, deemphasis=75 s62 db 76 subcarrier f=76khz, deemphasis=75 s90 db intermodulation 2 fmod=10khz, fspur=1khz 65 db 3 fmod=13khz, fspur=1khz 75 db traffic radio 57 signal f = 57khz 70 db sca ? subsidiary communication authorization 67 signal f = 67khz 75 db aci ? adjacent channel interference 114 signal f = 114khz 95 db 190 signal f = 190khz 84 db
TDA7514 18/74 3.4.1 notes to the characteristics 3.4.1.1 intermodul ation suppression measured with: 91% pilot signal; fm = 10khz or 13khz. 3.4.1.2 traffic radio (v.f.) suppression measured with: 91% stereo signal; 9% pilot signal ; fm=1khz; 5% subcarrier (f=57khz, fm=23hz am, m=60%) 3.4.1.3 sca ( subsidiary comm unications authorization ) measured with: 81% mono signal; 9% pilot signal; fm=1khz; 10%sca - subcarrier ( f s = 67khz, unmodu- lated ). 3.4.1.4 aci ( adjacent channel interference ) measured with: 90% mono signal; 9% pilot signal; fm=1khz; 1% spurious signal ( f s = 110khz or 186khz, unmodulated). 2 v o signal () at1khz () v o spurious () at1khz () ---------------------------------------------------------------- - ; f s 210khz ? () 19khz ? = = 3 v o signal () at1khz () v o spurious () at1khz () ---------------------------------------------------------------- - ; f s 3.13 khz ? () 38khz ? = = 57 v wf () v o signal () at1khz () v o spurious () at1khz 23khz () ----------------------------------------------------------------------------------------- - "" = 67 v o signal () at1khz () v o spurious () at1khz () ---------------------------------------------------------------- - ; f s 2.38khz () 67khz ? = = 114 v o signal () at1khz () v o spurious () at1khz () ---------------------------------------------------------------- - ; f s 110khz 3.38khz () ? = = 190 v o signal () at1khz () v o spurious () at1khz () ---------------------------------------------------------------- - ; f s 186khz 5.38khz () ? = =
19/74 TDA7514 3.5 noise blanker table 7. symbol parameter test condition min. typ. max. unit v tr blthl=peak+vbe+v prog trigger threshold 1) meas.with vpeak=0.9v, ingain=5.75db 111 30 mv op 110 35 mv op 101 40 mv op 100 45 mv op 011 50 mv op 010 55 mv op 001 60 mv op 000 65 mv op v trnoise blthh=peak+vbe+m*(peak-1.5v)+m*0.56v noise controlled trigger threshold meas.with vpeak=1.5v, ingain=5.75db 00 260 mv op 01 220 mv op 10 180 mv op 11 140 mv op v rect rectifier voltage with ingain=5.75db vmpx=0mv 0.5 0.9 1.3 v vmpx=50mv, f=150khz 1.5 1.7 2.1 v vmpx=200mv, f=150khz 2 2.5 2.9 v vrectdev deviation dependent rectifier voltage with vmpx=500mvrms & ingain=5.75db 11 0.9(off) v op 10 1.1 v op 01 1.8 v op 00 2.6 v op v rect fs fieldstrength controlled rectifier voltage meas.with vmpx=0mv, vlevel<< vsbl (fully mono) 11 0.9(off) v 10 1.1 v 01 1.5 v 00 2.8 v ts fm suppression pulse duration fm signal holdn in testmode 00 38 s 01 25.5 s 10 32 s 11 22 s v rectadj noise rectifier discharge (2) adjustment signal peak in testmode 00 inf. w 01 56 m ? 10 33 m ? 11 18 m ? sr peak noise rectifier (2) charge signal peak in testmode 010mv/ s 120mv/ s
TDA7514 20/74 notes: 1. all thresholds are measured using a pulse with t r = 2 s, t high = 2 s and t f = 10 s. the repetition rate must not increase the peak voltage. 2. by design/characterization functionally guaranteed through dedicated test mode structure symbol parameter test condition min. typ. max. unit v adjmp noise rectifier adjustment through multipath (2) signal peak in testmode 00 0.3 v/ms 01 0.5 v/ms 10 0.7 v/ms 11 0.9 v/ms am noise blanker t d am delay time 128 s f c corner frequency of am delay filter 4khz am config am configuration old mode (signal dependant threshold) noise dependent threshold new mode (fixed threshold), stdingain must be 0.5db 140 % fc hp am noise detector high pass frequency 010khz 120khz am noise detector high pass filter order 0 1 st order 1 2 nd order tsam suppression pulse duration am signal holdn in testmode 00 1.2 ms 01 800 s 10 1.0 ms 11 640 s table 8. quality actuators symbol parameter test condition min. typ. max. unit stereo blend vsb st vsb control voltage for full stereo 5v v sbl vsbl = 2v + (?d? factor) * 3v see below d vsb control voltage for full mono d factor 000 29 % 001 33 % 010 38 % 011 42 % 100 46 % 101 50 % 110 54 % 111 58 % table 7. (continued)
21/74 TDA7514 symbol parameter test condition min. typ. max. unit blend adjustment the filtered smeter input to the snc detector has variable gain and offset. see snc detector specs. high cut control vhch vhch = a * b * 4v (level = smeter * 1.0) see below a vhch shift ?a? factor 0001 97 % 0010 73 % 0100 50 % 1000 32 % b vhch ?b? factor 00 67 % 01 75 % 10 83 % 11 92 % vhcl vhc control voltage for full highcut rolloff for hcc control from level (where level = smeter * 1.0 ): vhcl = a * b * c * 4v (or vhcl = c * vhch) for hcc control from snc: vhcl = 2v + a * b * c * 3v c vhcl ?c? factor 00 16.70 % 01 22.20 % 10 27.80 % 11 33.30 % fc range hcc filter cutoff frequency range 00 20khz ~ 4khz 01 10khz ~ 2khz 10 4khz ~ 800hz 11 4khz ~ 800hz hcc step number of settings (per range) 32 table 8. quality actuators (continued)
TDA7514 22/74 symbol parameter test condition min. typ. max. unit at t max/min the maximum high cut attenuation can be selected via i 2 c [addr 8c, subaddr 23d, bits d2 to d1]. notes: - the maximum high cut frequency setting can make t he maximum attenuation lower than this. but then you effectively have a fixed rollo ff filter, because the max high cu t frequency will keep the hcc filter frequency from moving any higher, and the max high cut attenuation will keep the hcc filter frequency from moving any lower. - also, there is an alternative way of setting the maximum high cut at tenuation, but only if a maximum high cut frequency does not need to be selected. the fast3 can be set to limit the minimum high cut frequency [addr 8c, subaddr 25d, bit d6], then any of the 32 high cut frequencies can be selected to limit the max attenuation. max/min high cut attenuation(at 10khz)@ hcc range 20khz~4khz 00 -1.8 db 01 -4.4 db 10 -6.2 db 11 -7.0 db max/min high cut attenuation(at 10khz)@ hcc range 10khz~2khz 00 -5.6 db 01 -9.3 db 10 -11.5 db 11 -12.4 db fixed rolloff there are two ways to set the hcc filter to a fixed f ilter (there will be no dynamic movement of the filter). both of these will set the filter to the corner frequency selected in the max/min high cut frequency [addr 8c, subaddr 25d, bits d4 to d0]. 1) set the fast3 to fixed high cut on [addr 8c, subaddr 25d, bit d7]. 2) turn high cut off [addr 8c, subadress 23, bit d0] and fix maximum high cut frequency [addr 8c, subaddr 25d, bit d6] table 8. quality actuators (continued)
23/74 TDA7514 3.6 audio processor (v s = 8.5v; t amb = 25c; r l = 10k ? ; all gains = 0db; f = 1khz; unless otherwise specified) table 9. symbol parameter test condition min. typ. max. unit input selector r in input resistance all si ngle ended inputs 70 100 130 k ? v cl clipping level 2 v rms s in input separation 80 100 db g in min min. input gain -1 0 +1 db gi n max max. input gain 13 15 17 db g step step resolution 0.5 1 1.5 db v dc dc steps adjacent gain steps -5 1 5 mv g min to gmax -10 6 10 mv v offset remaining offset with autozero 0.5 mv quasi differential stereo input r in input resistance all inputs to ground 70 100 130 k ? g qd gain -4 db symbol parameter test condition min. typ. max. unit cmrr common mode rejection ratio v cm =1 v rms @ 1khz 46 70 db v cm =1 v rms @ 10khz 46 60 db e no output noise @ speaker outputs 20hz-20khz,flat; all stages 0db 20 v single-ended stereo input r in input resistance 70 100 130 k ? g qd gain 0db e no output noise @ speaker outputs 20hz-20khz,flat; all stages 0db tbd v differential mono input r in input resistance dif ferential 40 56 72 k ? g md gain -4 db cmrr common mode rejection ratio v cm =1 v rms @ 1khz 40 70 db v cm =1 v rms @ 10khz 40 60 db e no output noise @ speaker outputs 20hz-20khz,flat; all stages 0db tbd v beep control v rms beep level all flat tbd mv f beep beep frequency f beep1 500 hz f beep2 1khz f beep1 2khz f beep2 3khz
TDA7514 24/74 loudness control symbol parameter test condition min. typ. max. unit a max max attenuation -21 -19 -17 db a step step resolution 0.5 1 1.5 db f peaklpf lpf peak frequency f p1 32.5 hz f p2 40 hz f p3 150 hz f peaklpf hpf peak frequency f p1 4khz f p2 6khz f p3 8khz f p4 10 khz volume control g max max gain 14 15 16 db a max max attenuation -83 -79 -75 db a step step resolution 0.5 1 1.5 db e a attenuation set error g = -20 to +15db 2 db g = -79 to -20db 4 db e t tracking error 2db v dc dc steps adjacent attenuation steps 0.1 3 mv from 0db to g min 0.5 5 mv soft mute a mute mute attenuation 80 db t d delay time t1 0.48 ms t2 0.96 ms t3 20.2 ms t4 40.4 ms v th low low threshold for sm pin 1 v v th high high threshold for sm pin 2.5 v bass control c range control range 14 15 16 db a step step resolution 0.5 1 1.5 db fc center frequency f c1 54 60 66 hz f c2 72 80 88 hz f c3 90 100 110 hz f c4 117 130 143 hz q bass quality factor q 1 0.9 1 1.1 q 2 1.1 1.25 1.4 q 3 1.3 1.5 1.7 table 9. (continued)
25/74 TDA7514 symbol parameter test condition min. typ. max. unit q 4 1.8 2 2.2 dc gain bass-dc-gain dc = off -1 0 +1 db dc = on (shelving filter) @ gain = 15 db 10 db treble control c range clipping level 14 15 16 db a step step resolution 0.5 1 1.5 db fc center frequency f c1 81012khz f c2 10 12.5 15 khz f c3 12 15 18 khz f c4 14 17.5 21 khz speaker attenuators rin input impedance 35 50 65 k ? g max max gain 14 15 16 db a max max attenuation -83 -79 -75 db a step step resolution 0.5 1 1.5 db a mute mute attenuation 80 90 db e e attenuation set error 2 db v dc dc steps adjacent attenuation steps 0.1 5 mv chime input g gain to speaker outputs -19 db audio outputs v cl clipping level d = 0.3% 1.8 2 v rms r out output impedance 30 100 w r l output load resistance 2 k ? c l output load capacitor 10 nf v ac ac gain 4 db v dc dc voltage level 3.8 4.0 4.2 v general e no output noise bw=20hz to 20 khz all gain = 0db 20 v s/n signal to noise ratio a ll gain = 0db flat; vo=2v rms 100 db d distortion v in =1v rms; all stages 0db 0.005 0.1 % sc channel separation left/right 80 100 db table 9. (continued)
TDA7514 26/74 4i 2 c-bus interface the TDA7514 supports the i 2 c-bus protocol. this protocol defines any device that sends data onto the bus as a transmitter, and the receivi ng device as the receiver. the device that controls the transfer is a master and device being controlled is the slave. the master will always in itiate data transfer and provide the clock to transmit or receive oper ations. the TDA7514 is always a slave. 4.1 data transition data transition on the sda line must only occur when the clock scl is low. sda transitions while scl is high will be interp reted as start or stop condition. 4.2 start condition a start condition is defined by a high to low transi tion of the sda line while scl is at a stable high level. this "start" condition must precede any command and initiate a data transfer onto the bus. the device continuously monito rs the sda and scl lines for a valid st art and will not response to any com- mand if this condition has not been met. 4.3 stop condition a stop condition is defined by a low to high transi tion of the sda while the scl line is at a stable high level. this condition terminates the communic ation between the devices and forces the bus inter- face of the device into the initial condition. 4.4 acknowledge indicates a successful data transfer . the transmitter will release the bus af ter sending 8 bits of data. dur- ing the 9th clock cycle the receiver will pull the sda line to low level to indicate it receive the eight bits of data. 4.5 data transfer during data transfer the device samples the sda line on the leading edge of the scl clock. therefore, for proper device operation the sda line must be stable during the scl low to high transition. 4.6 device addressing to start the communication between two devices, the bus master must initiate a start instruction se- quence, followed by an eight bit word correspondi ng to the address of the device it is addressing. the TDA7514 addresses are: c4 hex (section 1 writ e), c5 hex (section 1 read), 8c hex (section 2 write), 8d hex (section 2 read). the TDA7514 connected to the bus will compare its own hardwired ad dresses with the slave address be- ing transmitted, after detecting a start condition. after this comparison, the TDA7514 will generate an "ackno wledge" on the sda lin e and will do either a read or a write operation according to the state of r/w bit. 4.7 write operation following a start condition the master sends a slave address word with the r/w bit set to "0". the de- vice will generate an "acknowl edge" after this first transmission a nd will wait for a second word (the sub- address field). this 8-bit subaddress field provides an access to any of internal registers. upon receipt of the word ad- dress the TDA7514 slav e device will respond with an "a cknowledge". at this ti me, all the following words transmitted will be considered as da ta. the internal subaddress can be automatically incremented, ac- cording to the status of the "page mode" bit (subaddress byte s5).
27/74 TDA7514 4.8 read operation if the master sends a slave addres s word with the r/w bit set to 1, the TDA7514 will tr ansmit one 8-bit data word (see the relevant tables in "register organization" section). figure 3. frame example s = start p = stop ack = acknowledge i = page mode figure 4. timing diagram and electrical characteristics section 1 msb lsb msb lsb msb lsb s1100010r/wack00 is4s3s2s1s0ack ackp section2 msb lsb msb lsb msb lsb s1000110r/wack00 is4s3s2s1s0ack ackp chip address subaddress data1 to datan chip address subaddress data1 to datan d95au378 t high t r t low t r scl sda in sda out t su-sta t hd-sta t hd-dat t sd-dat t subtop t txt t aa t dh
TDA7514 28/74 table 10. 4.9 register organization table 11. section 1 (turner)address table 12. subaddress table 13. read mode: iss outputs) symbol parameter test c ondition min typ max unit f scl scl clock frequncy 100 500 khz t aa scl low to sda data valid 300 ns t out time the bus must be free for the new transmission 4.7 s t hd-sta start condition host time 4.0 s t low clock low period 4.7 s t high clock high period 4.0 s t su-sda start conditions setup time 4.7 s t hd-dat data imput hold time 0 s t su-dat data input setup time 4.7 s t su-dat data input setup time 250 ns t r sda & scl rise time 250 s t f sda & scl full time s i su-sto stop condition setup time 4.7 s t dh data out time 300 ns v il input low voltage 1v v ih input high voltage 3 v msb lsb d7 d6 d5 d4 d3 d2 d1 d0 1100010r/w msb lsb s7 s6 s5 s4 s3 s2 s1 s0 x x autoincr subaddress msb lsb s7 s6 s5 s4 s3 s2 s1 s0 dev+ dev ac fs sstop mp bw on
29/74 TDA7514 table 14. address organization (tuner section) msb lsb function subaddr. d7 d6 d5 d4 d3 d2 d1 d0 0 stby current select low current high current charge pump control and stby 1 lock detenable activation delay phase difference threshold am/fm fref bypass vcoadj clockenab pll lock detector,fm mode and tests 2 counter lsb pll counter 1 (lsb) 3 counter msb pll counter 2 (msb) 4 counter lsb pll reference counter 2 (lsb) 5 counter msb pll reference counter 2 (msb) 6 fm fe slope adiust fm fe slope adjust 7 fm vco div am wagc starting point am wagc starting point, fm vco divider 8 set bp/hpii biquad set bp/ hpi biquad set f c ii biquad set f c i biquad fc enable ? f quad adjch filter programming, if counter control1 9 t sample t center if counter control 2 (central frequency and sampling time) 10 counter lsb if counter reference (lsb) 11 ifc am/fm counter msb if counter reference (msb) and if counter mode select 12 amvco div softmute to fm deviation am nagc threshold am nagc threshold, am vco divider 13 not used wb gain unagc threshold nagc off fast agc on am fast agc1, am nagc ogff, am unagc, wb audio gain 14 adich full mute level fsmeter full mute level adjch mute thr soft mute thr soft mute, adjacent channel mute 15 qual. multipath detector rectifier gain fsmeter offset fsmeter gain quality detection: fsmetr offset and gain (snc), multipath detector rectifier gain 16 issfilter test smeter 10ms/1s quality afcheck quality fast test hcc source qual adjacent channel dtctor rect. gain quality detection: adjch detector gain and offset, hcc source, quality fast test mode, af check mode: iss filter test 17 iss test connect smet test connect iss center frequency fmifamp2 gain fmifamp1 gain fm ifamp gains, isscenter frequency, smeter/iss test connections 18 set gain in adjch ii biquad enable seek mode quad adjch rectifier offset vco adj start pll test muxer qual adjch detector gain, seek mode, qual adjch rectifier offset, pll test muxer, 456khz vco adjustment start 19 manual/ enifc manual set 456 manual vco frequency manual/ auto 456khz vco adjustment (manual mode) 20 iss smeter threshold fm smeter stop threshold fm smeter stop threshold, iss smeter threshold 21 smeter test muxer sd pin configuration smeter test muxer, sd pin configuration 22 seek iss ac desens slope iss ac desens threshold iss ac filter mode seek, iss adjacent channel detector 23 fm kagc enable fm nagc thr msb fm mix gain adj fm mix phase adj fm mixer1 adjust, fm agc
TDA7514 30/74 table 15. subaddress 0: change pump control msb lsb function subaddr. d7 d6 d5 d4 d3 d2 d1 d0 24 not used clksep xtal adjustment xtal adjustment, clock sep 25 qualityout ac gain qualityout mp gain iss mp rectifier gain iss/quality mp filtergain multipath detector, quality out 26 fmnagc threshold lsd fmwagc threshold fm demod ref frequency divider fmdemod ref frequency divider, fm agc 27 not used fm demod nb fm demod fine adjust fm demod fine adjust, fm demod noise blanker 28 test disable connect ext wb enable smeter slider smeter sloder, external wb, testing 29 amif 2amp gain am smeter stop threshold am stop station, am if 2 amplifier gain fm demod input 30 not used am fast agc2 ars iss indicator wx narrow sm & ift1 adjust ift adjust, am fast agc2, ars, wb narrow smeter/fc 31 not used amifnb smeter dis threshold amifnb slow rect offset am if nb msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 0 0 0 0 high current = 0ma 0 0 0 1 high current = 0.5ma 0 0 1 0 high current = 1ma 0 0 1 1 high current = 1.5ma 1 1 1 1 high current = 7.5ma 00 low current = 0 a 0 1 low current = 50 a 1 0 low current = 100 a 1 1 low current = 150 a change cump current control 0 low current only 1 automatic current control turner stand-by 0 turner standby off 1 turner standby on table 14. address organization (tuner section) (continued)
31/74 TDA7514 table 16. subaddress 1: pll lock detector, fm mode and test table 17. subaddress 2: pll counter 1 (lsb) table 18. subaddress 3: pll counter 2 (msb) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 charge pump 0 vco adjust lock disable 1 vco adjust lock enable 0 fref bypass disable 1 fref bypass enable turner/pll am/fm mode 0 select am mode 1 select fm mode lock detector control 0 0 pd phase difference threshold 10ns 0 1 pd phase difference threshold 20ns 1 0 pd phase difference threshold 30ns 1 1 pd phase difference threshold 40ns 00 not valid 0 1 activation delay 4x1/f ref 1 0 activation delay 6x1/f ref 1 1 activation delay 8x1/f ref lock detector on/off 0 lock detector doesn?t control charge pump 1 lock detector controls charge pump msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 00000000lsb = 0 00000001lsb = 1 00000010lsb = 2 --------- 11111100lsb = 252 11111101lsb = 253 11111110lsb = 254 11111111lsb = 255 msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 00000000msb = 0 00000001msb = 256 00000010msb = 512 --------- 11111100msb = 64768 11111101msb = 65024 11111110msb = 65280 11111111msb = 65536 note: 1 swallow mode:f vco /f syn = lsb + msb + 32
TDA7514 32/74 table 19. subaddress 4: pll reference counter 1 (lsb) table 20. subaddress 5: pll reference counter 2 (msb) table 21. subaddress 6: fm fe adjustment slope msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 00000000lsb = 0 00000001lsb = 1 00000010lsb = 2 --------- 11111100lsb = 252 11111101lsb = 253 11111110lsb = 254 11111111lsb = 255 msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 00000000msb = 0 00000001msb = 256 00000010msb = 512 --------- 11111100msb = 64768 11111101msb = 65024 11111110msb = 65280 11111111msb = 65536 note: 1 f vco /f syn = lsb + msb + 1 msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 00000000 = 0 (-100%) 00000001 = 1 --------- 11111111 = 255 (+99%) adjusted voltage: without diode connected: vout = ( /128) vt
33/74 TDA7514 table 22. subaddress 7: am wagc starting point, fm vco divider msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 am wide agc threshold @ammix1in @sg 0 0 0 0 0 88.0 88.0 0 0 0 0 1 90.7 90.7 0 0 0 1 0 92.7 92.7 0 0 0 1 1 94.4 94.4 0 0 1 0 0 95.5 95.5 0 0 1 0 1 96.6 96.6 0 0 1 1 0 97.6 97.6 0 0 1 1 1 98.4 98.4 0 1 0 0 0 99.2 99.2 0 1 0 0 1 99.9 99.9 0 1 0 1 0 100.6 100.6 0 1 0 1 1 101.2 101.2 0 1 1 0 0 101.7 101.7 0 1 1 0 1 102.2 102.2 0 1 1 1 0 102.7 102.7 0 1 1 1 1 103.1 103.1 1 0 0 0 0 103.6 103.6 1 0 0 0 1 104.0 104.0 1 0 0 1 0 104.4 104.4 1 0 0 1 1 104.8 104.8 1 0 1 0 0 105.1 105.1 1 0 1 0 1 105.5 105.5 1 0 1 1 0 105.8 105.8 1 0 1 1 1 106.1 106.1 1 1 0 0 0 106.4 106.4 1 1 0 0 1 106.7 106.7 1 1 0 1 1 106.9 106.9 1 1 0 1 0 107.2 107.2 1 1 1 0 0 107.5 107.5 1 1 1 0 1 107.7 107.7 1 1 1 1 0 107.9 107.9 1 1 1 1 1 108.1 108.1 fm vco divider control 0 0 all off 0 1 divide by 2 1 0 divide by 3 1 1 divide by 3 0 phase (i) = -90 high side conversion 1 phase (i) = +90 low side conversion
TDA7514 34/74 table 23. subaddress 8 : if counter control 1 and am s.s. threshold table 24. subaddress 9: if counter control 2 msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 if counter frequency window 000not valid 001not valid 010not valid 011 ? f = 6.25khz (fm) 1khz (am upc) 100 ? f = 12.5khz (fm) 2khz (am upc) 101 ? f = 25khz (fm) 4khz (am upc) 110 ? f = 50khz (fm) 8khz (am upc) 111 ? f = 100khz (fm) 16khz (am upc) if counter on/off 0 if counter disable/stand by 1 if counter enable adjacent channel programming 0 filter 1fc = 80khz 1 filter 1fc = 100khz 0 - - - - filter 2fc = 110khz 1 filter 2fc = 140khz 0----filter 1hp 1filter 1bp 0----filter 2hp 1filter 2bp msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 fm antenna adj (proportional to vtuning) 00000f center = 10.60625mhz (fm) 449khz (am) 00001f center = 10.61250mhz (fm) 449khz (am) --------- 01010f center = 10.66875mhz (fm) 458khz (am) 01011f center = 10.67500mhz (fm) 459khz (am) 01100f center = 10.68125mhz (fm) 460khz (am) 01101f center = 10.68750mhz (fm) 461khz (am) 01110f center = 10.69375mhz (fm) 462khz (am) 01111f center = 10.70000mhz (fm) 463khz (am) 10000f center = 10.70625mhz (fm) 464khz (am) 10001f center = 10.71250mhz (fm) 465khz (am) --------- 11111f center = 10.80000mhz (fm) 479khz (am) if counter time windiw 000 t sample = 20.48ms (fm) 128ms (am) 001 t sample = 10.24ms (fm) 64ms (am) 010 t sample = 5.12ms (fm) 32ms (am) 011 t sample = 2.568ms (fm) 16ms (am) 100 t sample = 1.28ms (fm) 8ms (am) 101 t sample = 640 s (fm) 4ms (am) 110 t sample = 320 s (fm) 2ms (am) 111 t sample = 160 s (fm) 1ms (am)
35/74 TDA7514 table 25. subaddress 10: if counter reference (lsb) table 26. subaddress 11: if counter refere nce (msb) and if co unter mode select msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 00000000lsb = 0 00000001lsb = 1 00000010lsb = 2 --------- 11111100lsb = 252 11111101lsb = 253 11111110lsb = 254 11111111lsb = 255 msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 000000msb = 0 000001msb = 256 000010msb = 512 --------- 1 1 1 1 0 1 msb = 15616 1 1 1 1 1 0 msb = 15872 1 1 1 1 1 1 msb = 16128 if counter mode 0 0 not valid 0 1 if counter fm mode (10.7khz) 1 0 if counter am mode (450khz) 0 0 not valid note: 1 f osc /f tim = lsb + msb + 1
TDA7514 36/74 table 27. subaddress 12: am nagc , am vco divider msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 am narow band agc threshold @ammix2in @sg 0 0 0 0 0 79.9 77.9 0 0 0 0 1 82.4 80.4 0 0 0 1 0 84.2 82.2 0 0 0 1 1 85.7 83.7 0 0 1 0 0 86.5 84.5 0 0 1 0 1 87.7 85.7 0 0 1 1 0 88.6 86.6 0 0 1 1 1 89.5 87.5 0 1 0 0 0 90.1 88.1 0 1 0 0 1 91.0 89.0 0 1 0 1 0 91.6 89.6 0 1 0 1 1 92.1 90.1 0 1 1 0 0 92.6 90.6 0 1 1 0 1 93.1 91.1 0 1 1 1 0 93.6 91.6 0 1 1 1 1 94.0 92.0 1 0 0 0 0 94.5 92.5 1 0 0 0 1 94.8 92.8 1 0 0 1 0 95.2 93.2 1 0 0 1 1 95.5 93.5 1 0 1 0 0 96.0 94.0 1 0 1 0 1 96.2 94.2 1 0 1 1 0 96.9 94.9 1 0 1 1 1 97.2 95.2 1 1 0 0 0 97.5 95.5 1 1 0 0 1 98.0 96.0 1 1 0 1 1 98.5 96.5 1 1 0 1 0 98.8 96.8 1 1 1 0 0 99.1 97.1 1 1 1 0 1 99.4 97.4 1 1 1 1 0 99.7 97.7 1 1 1 1 1 100.0 98.0 fm soft mute to deviation threshold 0 50mv 1150mv am vco divider mode 00 divide by 10 01 divide by 8 10 divide by 6 11 divide by 4
37/74 TDA7514 table 28. subaddress 13: am fast agc1, am ultra narrow band agc, weather band gain table 29. subaddress 14: soft mute, adjacent channel mute (*) cfr. byte 20 for dependancy of iss smeter threshold on byte 14 programming msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 am fast agc1 0 off (r =100 kohm) 1 on (r = 9 kohm) am narrow agc disable 0nagc on 1nagc off am ultra narrow band agc threshold @ if2ampin @ sg 0000 76 67 0001 86 77 0010 92 83 0011 90 81 0100 75 66 0101 85 76 0110 88 79 0111 78 69 1000 74 65 1001 83 74 1010 90 81 1011 79 70 1100 73 64 1101 82 73 1110 87 78 1111 77 68 weather band audio gain boost 0 boost off (std audio gain) 1 boost on (audio gain x 15 = +23.5 db) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 soft mute start/stop point (fm, am) (*) 00v smeterl =0, v smeterh =0.6 01v smeterl =0.2, v smeterh =0.6 10v smeterl =0.5, v smeterh =1.4 11v smeterl =1.0, v smeterh =1.4 adjacent channel mute start/stop point (fm) 0v adjchl =1, v adjchh =4.5 1v adjchl =2 v adjchh =4.5 full soft mute level 0 0 0 -4db - - - (step = -2.5db) 1 1 1 -21.5db full adjacent channel mute level 0 0 0db 0 1 -6db 1 0 -9db 1 1 -12db
TDA7514 38/74 table 30. subaddress 15: quality detection: gain and offset on fsmeter (snc), multipath detector rectifier gain table 31. subaddress 16: qualit y detection: adjacen t channel detector, hcc source, quality fast test, quality af check, iss filter test msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 fsmeter gain (snc) 00000 db - - - - (step = 0.15) 1 1 1 1 2.25 db fsmeter offset (snc) 0 1.8 v 1 2.4 v multipath detector rectifier gain 000 5 db - - - (step = 1.2db) 1 1 1 +13.4 db msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 qual adjacent channel detector rectifier gain 0 0 12 db 0 1 17.3 db 1 0 18.4 db 1 1 20 db high cut control source 0snc 1 fsmeter quality filters fast test mode 0 test mode off 1 test mode on filt smeter tau = 100 us snc filt internal 22 pf quality filters af check freeze mode 0 af check off 1 af check on filt smeter tau = 100 us 60ms/1s smeter filt freeze mpath filt for stblend freeze usn filt for stblend/adjchmute freeze smeter filter time constant 01 s 1 10 ms iss filter test iss filter input 0std 1 filter in connected to smeter test muxer iss filter clock enable 0 clock off (test mode) 1 clock on (std)
39/74 TDA7514 table 32. subaddress 17: fm if amp gain, iss ce nter frequency, smeter / iss test connections msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 fm if amp1 gain 0 0 14 db 0 1 18 db 1 0 21.5 db 1 1 not used fm if amp2 gain (10.7 mhz) [byte<28>bit<6>=0] 0 0 (7 db) not used 0 1 9 db 1 0 11 db 1 1 15 db fm if amp2 gain (450 khz) [byte<28>bit<6>=1] 0 0 7 db 0 1 7 db 1 0 9 db 1 1 not used iss filter center frequency 0 0 430 khz 1 0 440 khz 0 1 450 khz 1 1 460 khz unfiltered smeter test connection 0std 1 unfilt smeter users connected to #acinl unfilt smeter source disconnected form users iss test muxer connection 0std 1 iss test muxer (tmode1) connected to #smetertc smeter filt (60ms/1s) r disconnected from #smetertc
TDA7514 40/74 table 33. subaddress 18: pll test , 456khz vco adjust start, iss mp gain and sd out mode msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 pll test "testdout1" (pin #lfhc) 0 0 0 no test 0 0 1 fref [ref freq divid out] output, 3v 0 1 0 fsyn [vco freq div out] output, 3v 0 1 1 phi [vco prescal out] output, 3v 1 0 0 psm [prescal reset] output, 3v 1 0 1 phi input, 3/5v 1 1 0 fsyn input, 3/5v 1 1 1 sstop (cntres), fsyn input, 3/5v pll test "sstop" (pin #sd) (byte<21>bit<10>=01 0 0 0 no test output, 3v 0 0 1 ifref output, 3v 0 1 0 zeroone output, 3v 0 1 1 stim output, 3v 1 0 0 ifcout output, 3v 1 0 1 fsyn output, 3v 1 1 0 ltst (lock det test) output, 3v 1 1 1 inlock output, 3v 456 khz self-adjustme nt state machine 0 if byte<19>bit<0>=0 and byte<1>bit<0>=0 0 waiting 1start adjacent channel detector rectifier offset 0 0 0.39 v 0 1 0.78 v 1 0 1.14 v 1 1 1.49 v quality seek mode 0fs 1 enable seek mode adjch detector filter gain 0 filter 2 gain = 8.5 db 1 filter 2 gain = 14.5 db
41/74 TDA7514 table 34. subaddress 19: 456khz vc o adjustment (manual mode) table 35. subaddress 20 : fm smeter st op threshold, iss smeter threshold. (*) threshold is programmed by byte 14 bits<1:0> according to the following table: table 36. subaddress 14: soft mute msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 0 enable ifc (i 2 cbus) off 1 on 0 enable 456khz vco adj procedure (i 2 cbus) off 1 on 00000 vco 456khz frequency adjust (i 2 cbus) minfreq 10000 ----- 11110 00001 ----- 01111 11111 maxfreq vco 456khz frequency adjust mode 0 manual adjustment procedure (i 2 cbus) 1 automatic adjustment pr ocedure (state machine) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 fm smeter stop station threshold 0 0 0 0 400 mv - - - - step 200 mv 1 1 1 1 3400 mv fm iss smeter threshold ( ? from softmute thresh. (*)). 0000 0 mv - - - - step 67 mv 0 1 1 1 467 mv 1000 0 mv ---- - 1111 -467 mv msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 soft mute threshold 0 0 0.3v 0 1 0.4v 1 0 1.6v 1 1 1.8v
TDA7514 42/74 table 37. subaddress 21 : sd pin conf iguration, smeter test muxer msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 sd pin configuration 0 0 ifc and fs stop station (output) 0 1 ifc (output) 1 0 fs stop station (output) 1 1 test (tristate) pin #sd used as: output from iss ac det output from iss mp detinput to iss ac driver input to iss mp driver smeter test muxer 000000 test off 000001 am agc1w offset 000010 amagc1n offset 000011 am agc1un offset 0 0 0 1 0 0 fm multipath peak 000101 fm sd thr 000110 am if2amp out 000111 am sd thr 001000 fm w/kagc out 0 0 1 0 0 1 not used 001010 fm demodadj out 001011 fm demodadjmute out 001100 inlock 0 0 1 1 0 1 fm smeterisson thr 0 0 1 1 1 0 fm smeterisson bit 0 0 1 1 1 1 fm issfilter input (out) [if byte<16>bit<6>=1] 0 1 0 0 0 0 456kvcoadj set456 bit 010001 456kvcoadj enifc bit 0 1 0 0 1 0 456kvcoadj check bit 010011 456kvcoadj q21 bit 010100 fm smeterunfiltered 0 1 0 1 0 1 qual smeterx1 010110 qual smeter1ms 010111 qual usn 011000 std noise 0 1 1 0 0 1 fm adjchmute ref 011010 fm sofmute ref 0 1 1 0 1 1 am ifnbsmetertosd command [must put sd in tristate] 011100 am ifnb fastrect out 011101 am ifnb slowrect out 0 1 1 1 1 0 am ifnb blank pulse 0 1 1 1 1 1 am ifnb smetdesens thr 100000 fm nagc out
43/74 TDA7514 table 38. subaddress 22: seek, is s adjacent channel detector table 39. subaddress 23: fm mixer1 adjust, fm agc msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 iss adjacent channel detect. filter shape filt1 filt2 fo q 0 0 hp hp 130 2.3 0 1 bp hp 100 7.7 1 0 bp bp 177 2.0 1 1 bp bp 100 8.4 iss adjacent channel detect. filter gain 0 23 db 1 29 db iss adjacent channel detect. filter desens threshold at weak field strength 0 0 0.25 v 0 1 0.8 v 1 0 1.3 v 1 1 1.8 v iss adjacent channel detect. filter desens slope at weak field strength 00 min 01 - 10 - 11 max seek fm am agc2 tau 0 seek off - - 1 seek on iss disable short msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 fm mixer1 phase adjust. 0000-7 0001-6 0010-5 ----- 01110 1000+1 1001+2 ----- 1111+8 fm mixer1 gain adjust. 00 0% 01 -1% 10 1% 11 0% x fm nagc threshold msb (lsb in byte 26) fm agc topology 0 nagc on, kagc off 1 nagc off, kagc on
TDA7514 44/74 table 40. subaddress 24: xtal adjustment, clock sep table 41. subaddress 25 : multip ath detector, quality out msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 xtal ajustment capacitors from xtalg to gnd from xtald to gnd 00000 0 pf 0 pf 00001 1.25 pf 1.25 pf 00010 2.5 pf 2.5 pf 00100 5 pf 5 pf 01000 10 pf 10 pf 10000 20 pf 20 pf 11111 38.75 pf 38.75 pf xtal test 0 std xtal clock 1 clocksep (test on) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 iss/quality mpath det. filter gain 00-7.2 db 0 1 4.3 db 1 0 6.5 db 1 1 10.4 db iss mpath det. rectifier gain 0 0 6 db 1 0 12 db 0 1 18 db 1 1 21.5 db quality out mpath gain 00 off 01 -4 db 1 0 0 db 11 +4 db quality out adjchann gain 00 off 01 -4 db 1 0 0 db 11 +4 db
45/74 TDA7514 table 42. subaddress 26: fm dem od ref frequency test, fm agc table 43. subaddress 27: fm de modulator fine adjust , fm demodulator noise blanker msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 fm demod ref frequency divider 0 0 0 640.6 khz 0 0 1 602.9 khz 0 1 0 569.4 khz 0 1 1 539.5 khz 1 0 0 512.5 khz 1 0 1 488.1 khz 1 1 0 465.9 khz (std) 1 1 1 445.7 khz fm wagc starting point 000 mininum s.p. --- - 010 std --- - 1 1 1 maximum s.p. fm nagc starting point lsb (msb is bit 6 byte 23) 0 0 minimum s.p. (with msb = 0) -- - 1 0 std (with msb = 0) 0 0 (with msb = 1) -- - 1 1 maximum s.p. (with msb = 1) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 fm audio demodulator current adjust 00000+0 ua 0 0 0 0 1 +0.167 a ------ 0 1 1 1 1 +2.51 a 10000-0 a 1 0 0 0 1 -0.167 a 1- - - -- 1 1 1 1 1 -2.51 a fm demodulator noise blanker 00 nb off 0 1 setting 1 1 0 setting 2 1 1 setting 3
TDA7514 46/74 table 44. subaddress 28 : smeter slider, external wb, testing table 45. subaddress 29: am stop st ation, am if 2 amplifier gain msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 smeter slider fm am 0000000 mv 0 mv 000001+46 mv +39 mv ------- - 0 1 1 1 1 1 +1420 mv +1215 mv 1000000 mv 0 mv 1 0 0 0 0 1 -46 mv -39 mv ------- - 1 1 1 1 1 1 -1420 mv -1215 mv external wb filter on 0 std fm (no ext. wb filter) 1 external wb filter enabled; must also program iss on apsdlatch 23 bit 1 = 1 fm demod vout test 0std 1 test; disconnect fm demod vout from users msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 am stop station threshold 0 0 0 0 300 mv 0 0 0 1 450 mv 0 0 1 0 600 mv ---- 1 1 1 1 2550 mv am if amp gain (am mode) [db] fm demodulator input connection (bit 5) 0 0 0 0 not used (31.1) 450 khz limiter 0 0 1 0 67.6 stereo dec. 456 khz vco (test) 0 1 0 0 70.6 450 khz limiter 0 1 1 0 74.7 stereo dec. 456 khz vco (test) 1000 72.2 ? 1010 75.6 ? 1100 76.9 ? 1110 78.8 ? 0001 75.3 ? 0011 77.7 ? 0101 78.7 ? 0111 80.2 ? 1001 79.3 ? 1011 80.7 ? 1101 81.3 ? 1111 82.3 ?
47/74 TDA7514 table 46. subaddress 30: ift adjust, am fa st agc2, ars, wb narrow smeter/ifc table 47. subaddress 31 : am if nb msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 0000 ift1 adjust 0 pf 0 0 0 1 0.55 pf ---- - 0111 7.7 pf 1 1 1 1 8.25 pf wx narrow sm&ifc 0off 1on ars - iss indicator 0off 1on am fast agc2 enable 0off 1 on -> (if vaudio-vref > 1.5 v then fast on) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 am if nb threshold 00000 mv 000146 mv 0010100 mv 0011146 mv 0100212 mv 0101257 mv 0110312 mv 0111362 mv 1000439 mv 1001485 mv 1010541 mv 1011587 mv 1100653 mv 1101700 mv 1110755 mv 1111800 mv am if nb disable threshold 00 4.4 v 01 2.2 v 10 0.5 v 11 off
TDA7514 48/74 4.10 section 2 (stereodecoder, audioprocessor + tuner)section 1 (turner) table 48. address table 49. subaddress 4.11 read mode: iss output msb lsb d7 d6 d5 d4 d3 d2 d1 d0 1000110r/w msb lsb s7 s6 s5 s4 s3 s2 s1 s0 testcon azhold autoincr subaddress msb lsb s7 s6 s5 s4 s3 s2 s1 s0 smeter adc stereo smon table 50. audio processor / stereo decoder - related bytes msb lsb function subaddr. d7 d6 d5 d4 d3 d2 d1 d0 0 loudness gain correctionl input gain source selector source selector, 1 soft step volume steps volume 2 soft step loudness gain pass corner frequency loudness steps loudness 3 speaker coupling treble center frequency treble steps tr e b l e 4 soft step bass quality factor bass steps bass 5 soft step speaker steps speaker left front 6 soft step speaker steps speaker lright front 7 soft step speaker steps speaker left rear 8 soft step speaker steps speaker right rear 9 rear seat audio on bass dc cut bass center frequency mute (*) soft mute time mute (*) configuration audio processor 1 10 rear seat audio selector loudness freq. resp. soft step time loudness low pass corner frequency loudness treble boost configuration audio processor ii 11 beep frequency az on chime dis mute (*) configuration audio processor iii rr lr rf lf 12 de-emph time constant pilot threshold nb peak charge cur force mono nb am fix threshold std in gain mute (*) stereo decoder ii, nb ii 13 mp infl. on nb enable nb dis. from mp (test) nb am hpf order nb am hpf corner roll-off compensation stereo decoder iii, nb iv
49/74 TDA7514 table 51. subaddress 0: input selector msb lsb function subaddr. d7 d6 d5 d4 d3 d2 d1 d0 14 nb overdev-contr thr. nb on nb noise-contr. thr. nb low threshold nb iii 15 nb time mp infl. on nb vhch shift stereo decoder iii, nb iv 16 strong mp infl. on nb enable vhcl vhch max hc hcenable stereo decoder iv, nb v 17 am/fm for std adc on hc from snc/lev nb level-contr. thr. nb smeter thresholds std in switch am/fm mode selection, stereo decoder v, nb vi 18 hc fixed hc min/max am 7.2khz lpf hc corner freq. stereo decoder vi 19 ap test on vco on std test muxer ext. clock std teston apsd test tuner-related bytes 20 "ac+" - "ac" thresholds difference "ac" threshold not used iss 20khz on iss: adjacent channel detector 21 iss mp defeat ac not used not used iss mp threshold not used iss mp ctrl on iss: multipath detector 22 not used dev+/dev thresholds ratio "dev" threshold peak detector discharge current iss: deviation detector 23 not used not used iss time constant iss 80/120 iss on iss enable iss filter 24 mp/ac test switch iss test multiplexing iss test 25 iss filter control matrix iss filter control matrix 26 iss filter control matrix iss filter control matrix 27 not used not used not used iss filter control matrix iss filter control matrix 28 not used not used not used hc range vsbl vsbl generation, hc range msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 source selector 0 0 0 quasi differential input 0 0 1 mono differential input 0 1 0 single ended input 011turner 100turner 1 0 1 internal beep 110mute 1 1 1 not allowed input gain 0000 0db 0001 1db ---- - 1 1 1 0 14db 1 1 1 1 15db loudness filter gain correction 0 higher gain 1 lower gain table 50. audio processor / stereo decoder - related bytes
TDA7514 50/74 table 52. subaddress 1,4,5,6,7: volume spkr atten. lf, rf, lr, rr table 53. subaddress 2: loudness msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 gain/attenuation 0 0 0 1 1 1 1 15db -------- 00000011db 00000000db 00100000db 0010001-1db -------- 0 1 0 0 0 0 0 -16db -------- 0 1 1 0 0 0 0 -32db -------- 1 0 0 0 0 0 0 -48db -------- 1 0 1 0 0 0 0 -64db -------- 1 0 1 1 1 1 0 -79db 1 1xxxxxmute bass filter dc modesoft step on/off 0on 1off msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 attenuation 000000 db 00001-1 db 00010-2 db ...... 10011-19 db 10100-20 db all higher values not allowed loudness high pass corner freq. 00 4 khz 01 6 khz 10 8 khz 1 1 10 khz soft step on/off 0 on 1 off
51/74 TDA7514 table 54. subaddress 3: treble filter table 55. subaddress 4: bass filter msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 gain/attenuation 0 0 0 0 0 -15db 0 0 0 0 1 -14db ------ 01110-1db 011110db 111110db 111101db ------ 1 0 0 0 1 -14db 1 0 0 0 0 -15db center frequency 0 0 10.0khz 0 1 12.5khz 1 0 15khz 1 1 17.5khz speaker coupling 0 external (ac) 1 internal (dc) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 gain/attenuation 1 1 1 1 1 -15db 1 1 1 1 0 -14db ------ 10001-1db 100000db 000000db 000011db ------ 0 1 1 1 0 -14db 0 1 1 1 1 -15db quality factor 0 0 1.00 0 1 1.25 1 0 1.50 11 2 bass soft step 0off 1on
TDA7514 52/74 table 56. subaddress 9: config uration audio processor i (*) cfr. apsd mute table table 57. subaddress 10: confi guration audio processor ii msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 ap i 2 c soft mute 0 force ap i 2 c mute (*) 1 allow ap mute from pin (*) soft mute time 0 0 mute time = 0.48ms 0 1 mute time = 0.96ms 1 0 mute time = 20.2 ms 1 1 mute time = 40.4 ms std mute ctrl.from ap mute 0 enabled (*) 1 disabled (*) bass center frequency 0 0 60 hz 0 1 80 hz 1 0 100 hz 1 1 130 hz bass dc cut 0on 1off rear seat audio 0 on 1 off msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 loudness treble boost 0 on (advise bit7 byte10 = 1) 1 off (advise bit7 byte10 = 0) loudness low pass corner freq. 0 0 32.5 hz 0 1 40 hz 1 0 150 hz 1 1 not used (150 hz) soft step time 0 0 280 us 0 1 560 us 1 0 1.12 ms 1 1 2.24 ms loudness frequency response 0filter on 1 filter flat (can be used as an attenuator) rear seat audio selector 0 0 quasi differential input 0 1 single ended input 1 0 tuner 11 mute
53/74 TDA7514 table 58. subaddress 11: configuration audio processor iii (*) cfr. apsd mute table table 59. subaddress 12: stereodecoder (*) cfr. apsd mute table msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 apsd mute ctrl. from pin 0 pin influence disabled (*) 1 pin influence enabled (*) chime mix left front 0on 1off chime mix right front 0on 1off chime mix left rear 0on 1off chime mix right rear 0on 1off auto zero enable 0off 1 on (0->1 causes az sequence to start; 1 enables sequence control from latch<0>) beep frequencies 0 0 500 hz 0 1 1000 hz 1 0 2000 hz 1 1 3000 hz msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 std i 2 c mute (high-ohmic + pll hold) 0 force std i 2 c mute (*) 1 allow std mute ctrl. from pin std in gain 0 0 +5.75 db 0 1 +4.00 db 1 0 +2.25 db 1 1 +0.50 db 0 nb am old mode (if am=1) 1 nb am new mode (if am=1) 0 force mono 1 mono/stereo switch automatically noise blanker peak charge current 0low 1high pilot detector threshold 0high 1low deemphasis time constant fm am (dep. on source selector) 0 50 us 14.9 khz 1 75 us 22.3 khz
TDA7514 54/74 subaddress 13: stereodecoder noise blanker msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 roll off compensation 0 0 0 0 not allowed 00017.2% 00109.4% ..... 0 1 0 0 13.7% ..... 0 1 1 1 20.2% 1 0 0 0 not allowed 1 0 0 1 19.6% 1 0 1 0 21.5% ..... 1 1 0 0 25.3% ..... 111131% nb am high pass frequency 0 10 khz 1 20 khz nb am high pass filter order 0 first order 1 second order disable noise blanker @ mp > 2.5 v (test) 0on 1off multipath influence on fixed nb noise detector discharge resistor 0 disabled 1 enabled
55/74 TDA7514 table 60. subaddress 14: noise blanker table 61. subaddress 15: noiseblanker & high cut (**)cfr. hcc/sb threshold table msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 low threshold (fm) (am) 0 0 0 65 mv 166% 0 0 1 60 mv 156% 0 1 0 55 mv 147% 0 1 1 50 mv 137% 1 0 0 45 mv 128% 1 0 1 40 mv 118% 1 1 0 35 mv 109% 1 1 1 30 mv 99% noise controlled threshold 0 0 320 mv 0 1 260 mv 1 0 200 mv 1 1 140 mv 0 noise blanker off 1 noise blanker on over deviation threshold 0 0 over deviation adjust 2.8v 0 1 over deviation adjust 2.0v 1 0 over deviation adjust 1.2v 1 1 over deviation detector off msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 vhch shift ("a" factor) (**) 000197% 001073% 010050% 100032% strong multipath-controlled noise rectifier discharge resistor (if bit7 byte 16 = 1) 0 0 r = infinity 0 1 r = 56mohm 1 0 r = 33mohm 1 1 r = 18mohm noise blanker time fm am 0 0 34 us 1130 us 0 1 24 us 755 us 1 0 29 us 950 us 1 1 22 us 651 us
TDA7514 56/74 table 62. subaddress 16: noiseblanke r (**) cfr. hcc/sb threshold table (***) lower limit for possible automatic hc filter position; frequency is given by the following formula: with n given by the software table abovef the minimum hc filter pole frequency depends on the hc range selected (see byte 28 bi ts <4:3>) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 high cut enable 0 high cut off (fixed to max corner freq.) 1 high cut on max. high cut (***) 00 max n "4" 0 1 max n "13" 1 0 max n "20" 1 1 max n "31" vhch ("b" factor) (**) 0 0 67% 0 1 75% 1 0 83% 1 1 92% vhcl ("c" factor) (**) 0 0 20% 0 1 25% 1 0 30% 1 1 35% strong multipath influence on rectifier discharge current 0 disabled 1 enabled fp 1 1 f max --------- - n 31 ------ 1 f min -------- 1 f max --------- - ? ?? ?? + ------------------------------------------------------ - =
57/74 TDA7514 table 63. subaddress 17: high cut, nois e blanker, adc, stdec in switch (**) cfr. hcc/sb threshold table table 64. subaddress 18: high cut (***) high cut lpf corner frequency formula: fhicut = fmax / ( 1 + n / 7.75) with n = 0,1,..,31 and fmax = 4 khz, 10 khz or 20 khz according to byte 28 bit 3 and 4 msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 stereo decoder input switch 0 switch closed (signal c an go into stereo decoder) 1 switch open (signal can not gon into stereo decoder) minimun and maximun smeter thresholds for nb 0 0 2.2 , 4.3 0 1 3.2 , 4.6 1 0 2.7 , 4.5 1 1 3.7 , 4.7 nb max peak value generated from smeter 0 0 1.8 v 0 1 1.5 v 1 0 1.1 v 11 off hcc threshold generation mode (vhch, vhcl)(**) 0 snc off 1 snc on smeter adc operation 0 adc convert stop 1 adc convert start am/fm mode selection for stereodecoder 0 fm mode 1 am mode msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 max/min high cut frequency (***) 0000020 khz/ 10 khz 00001. ..... 111114 khz/ 2 khz 0 am 7.2khz lpf off 1 am 7.2khz lpf on high cut filter limiting (am) 0 fix maximum high cut frequency 1 fix minimum high cut frequency 0 fixed high cut off 1 fixed high cut on
TDA7514 58/74 table 65. subaddress 19: stereo deco der test multiplexer table 66. subaddress 20: iss weather band controls and adjacent channel thresholds msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 stereo decoder test signals 0off 1 test signals enabled (if d7 of subaddress is also) ?1? 0 external clock 1 internal clock test signals 0000 v hcch 0001 smeter for adc 0010 pilot m agnitude 0011 vco control voltage 0100 pilot threshold 0101 holdn 0110 nb threshold 0111 f228 1000 v hccl 1001 vsbl 1010 level for nb 1011 hcc input 1100 peak 1101 sb i nput 1110 ref 5v 1111 f228 400khz vco off 0on 1off audioprocessor test mode 0off 1 enabled if d7 of subaddress is also ?1? msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 iss weather band 0 iss filter 20khz (weather band) off 1 iss filter 20khz (weather band) on x not used x not used "ac" threshold ( + ref3v ) 0 0 0 0.25 v 0 0 1 0.35 v 0 1 0 0.45 v --- - 1 1 1 0.95 v "ac+" - "ac" thresholds difference 0 0 0.0 v 0 1 0.1 v 1 0 0.2 v 1 1 0.3 v
59/74 TDA7514 table 67. subaddress 21: iss multipath table 68. subaddress 22: iss deviation thresholds msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 multipath control 0on 1off x not used x not used mp threshold 0 0 0.50 v 0 1 0.75 v 1 0 1.00 v 1 1 1.25 v x not used x not used 0 mp=1 disables "ac+" detection 1 mp=1 disables "ac" and "ac+" detection msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 peak detector discharge current 0006ua 0018ua 0 1 0 10ua 0 1 1 12ua 1 0 0 14ua 1 0 1 16ua 1 1 0 18ua 1 1 1 20ua "dev" threshold 0 0 30 khz 0 1 45 khz 1 0 60 khz 1 1 75 khz dev+ / dev thresholds ratio 00 1.5 01 1.4 10 1.3 11 1.0 x not used
TDA7514 60/74 table 69. subaddress 23: iss detector table 70. subaddress 24: iss test msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 iss enable (active low) 0on 1off iss filter on/off manual control 0off 1on iss filter bandwidth manual control 0 120 khz 1 80 khz discharge current;charge current mid; narrow 0 0 0 1ua; 74ua; 124ua 0 0 1 3ua; 72ua; 122ua 0 1 0 5ua; 70ua; 120ua 1 0 0 9ua; 66ua; 116ua 1 1 1 15ua; 60ua; 110ua x x not used msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 iss test muxer selector (test signal at pin smetertc if bit7 byte17 tuner software is 1) 0001mpthreshold 0010acnthreshold ("ac" threshold) 0011dwthreshold ("dev" threshold) 0100dthreshold ("dev+" threshold) 0101acwthreshold ("ac+" threshold) 0110ac 0111mdsco 1000iss out 1001dev+ 1010dev 1011refdev 1100demvout output if bit 7 byte 28 tuner = 0 input if bit 7 byte 28 tuner = 1 iss ac/mp test mode (pin sd) 0 internal ac signal is connected to qualidetector ac input (normal mode) 1 internal ac signal is output to pin sd (test mode) 0 qualidetector ac input is driven by internal ac signal (normal mode) 1 qualidetector ac input is driven by pin sd (test mode) 0 internal mp signal is connected to qualidetector mp input (normal mode) 1 internal mp signal is output to pin sd (test mode) 0 qualidetector mp input is driven by internal mp signal (normal mode) 1 qualidetector mp input is driven by pin sd (test mode)
61/74 TDA7514 table 71. subaddresses 25-27: iss filter control matrix table 72. table 73. subaddress 28: vs bl generation, hc range strong field (sm = 0) truth table for isson small frequency deviation m edium frequency deviation l arge frequency deviation no adjacent channel 0 0 0 weak adjacent channel byte 25 / bit 0 byte 25 / bit 1 byte 25 / bit 2 strong adjacent channel 1 byte 25 / bit 3 byte 25 / bit 4 truth table for iss80 small frequency deviation medium frequen cy deviation large frequency deviation no adjacent channel 0 0 0 weak adjacent channel byte 25 / bit 5 byte 25 / bit 6 0 strong adjacent channel byte 25 / bit 7 byte 26 / bit 0 byte 26 / bit 1 weak field (sm = 1) truth table for isson small frequency deviation medium frequenc y deviation large frequency deviation no adjacent channel 1 byte 26 / bit 2 0 weak adjacent channel 1 byte 26 / bit 3 byte 26 / bit 4 strong adjacent channel 1 1 byte 26 / bit 5 truth table for iss80 small frequency deviation medium frequenc y deviation large frequency deviation no adjacent channel byte 26 / bit 6 byte 26 / bit 7 0 weak adjacent channel byte 27 / bit 0 byte 27 / bit 1 byte 27 / bit 2 strong adjacent channel 1 byte 27 / bit 3 byte 27 / bit 4 msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 vsbl ("d" factor) (**) 00029% 00133% 01038% 01142% 10046% 10150% 11054% 11158% high cut filter range 0 0 20 khz - 4 khz 0 1 10 khz - 2 khz 1 0 4 khz - 800 hz 1 1 4 khz - 800 hz
TDA7514 62/74 table 74. audio processor / stereo decoder mute byte 12 bit 0 = 0 force i 2 cbus std mute byte 9 bit 0 = 0 force i 2 cbus ap mute 11 bit 0 = 1 ap / std mute depends on pin hcc control from snc vhch = 2v + 3v * a * b vhcl = 2v + 3v * a * b *c hcc control from level (level = smeter * 0.7) vhch = ab 4v vhcl = abc 4v sbl vsbl = 2v + d 3v byte 9 byte 9 byte 11 byte 12 pin status status bit 0bit 3bit 0bit 0 55 ap std 00000mutemute 00001mutemute 00010mutemute 00011mutemute 00100mutemute 00101mutemute 00110mutemute 00111muteplay 01000mutemute 01001mutemute 01010muteplay 01011muteplay 01100mutemute 01101mutemute 01110mutemute 01111muteplay 10000playmute 10001playmute 10010playplay 10011playplay 10100mutemute 10101playmute 10110mutemute 10111playplay 11000playmute 11001playmute 11010playplay 11011playplay 11100mutemute 11101playmute 11110mutemute 11111playplay
63/74 TDA7514 5 functional description 5.1 fm tuner section 5.1.1 front end the fm tuner section features an image rejection mixer. its low noise figure allows connecting the antenna to the mixer without any discrete preamplifier. the external preselection circuit can be realized with one tuned filter only. the filter can be electrically aligned by shifting the filter tuning voltage with respect to the vco tuning voltage through an 8 bit dac. the mixer image rejection trimming is obtained by tuni ng the relative phase offset and relative gain of the i and q mixer paths. the mixer output (common with the am 1st mixer output) is connected to a tuned if transformer, with th e possibility of electrically ad justing the center frequency through an internal 4 bit ca- pacitor bank. the fm agc can operate in two different software-selectable modes: ? keyed wide band mode: the agc detects the strength of the wide band rf signal at the input of the 1st mixer to activate the agc attenuation; the starti ng point is programmable via software and is var- ied over a >40 db range by the very narrow band smeter signal in order to set a maximum suppres- sion limit that prevents the desired channel from decreasing below an acceptable level; ? wide band + narrow band mode: the agc detects the strength of both the wide band rf signal at the input of the 1st mixer and of the narrow band if signal at the output of the ift1(both starting points are software-programmable); this mode allows a smooth transition between near adjacent and far ad- jacent suppression. the agc features a single current output used to drive the front end p-i-n diode attenuator. 5.1.2 if filtering fm channel selection is mainly done by use of external ceramic filters. two different software-program- mable configurations are available: ? normal fm mode: three ceramic filters can be connected using two impedance-matched if amplifiers (both with programmable gains); the third ceramic filter is connected to the 2nd mixer input; ? high-performance weather band applications: when an optimum weather band channel selection is required, the TDA7514 allows to connect a dedicated narrow band external 450 khz ceramic filter to implement this function. in this case only two 10 .7 mhz ceramic filters can be connected for standard fm selectivity. the 1st ceramic filter is normally connected between the ift1 output and the 1st if amplifier input; the 2nd ceramic filter is connected between the 1st if amplifier input and the 2nd mix- er input; the 450 khz wb filter is connected between the 2nd if amplifier output and the 2nd if am- plifier input. both the single standard fm if amplifier gain and the 450 khz wb filter driver if amplifier gain are software programmable. 5.1.3 limiting and demodulation the TDA7514 features a fully integrated fm demodulator which requires a lower if than 10.7 mhz. there- fore a 2nd mixer is provided to down-convert if1 down to 450 khz. the 10.25 mhz frequency needed to drive the 2nd mixer is prov ided by the xtal oscillato r. limiting is performed at if2 through a 5 stage lim- iter. the demodulator exhibits a very linear frequency-v oltage conversion. precise cancellation of the de- modulator output voltage offset is available via software control especially for high audio gain wb applications. field strength measurement (smeter) is performed thro ugh use of a separate if1 limiter and logarithmic amplifier. the if1 limiter output is also used to feed the fm if counter block.
TDA7514 64/74 variable-bandwidth selectivity system (iss) the TDA7514 is equipped with the intelligent selectivity system that automatically perfo rms if bandwidth reduction in presence of strong adjacent channels or weak desired signal. a three position filter is available at if2; its bandwidth settings are: 120 khz, 80 khz and 22 khz (the latter only for additional on-board wb filtering). the filter is positioned between the 2nd mixer and the if2 limiter. the filter is switched among its off, 120 khz and 80 khz positions by a dedicated quality detection circuit. the conditions that are detected in order to drive the filter position are: ? adjacent channel presence; ? peak frequency deviation magnitude; ? field strength. the adjacent channel detection (programmable filter shape and gain, programmable rectifier gain, pro- grammable flag generation thresholds, programmable integrator charge/discharge currents) can be par- tially or totally disabled, if so programmed, when a strong multipath condition is detected (filter shared with quality circuits with programmable gain, independent rectifier with programmable gain, programmable in- tervention threshold). the adjacent channel detector is further disabled when the field strength is lower than a programmable threshold (slope programmable as well). the output of the detector are two flags signalling a moderate or a stro ng adjacent channel presence. the peak frequency deviation is detected by rectifying and peak-detecting the mono part of the mpx signal (programmable integrator charge/discharge currents, programmable thresholds). the deviation detector is desensitized at weak field strength (programmabl e threshold). the output of the detector are two flags signalling a moderate or hi gh amount of peak deviation. the field strength is measured against a prog rammable threshold and generates one flag. these five flags are combined to control the iss bandwidth by access to a 3-d matrix that can be pro- grammed almost completely: it is th erefore possible to specify the filter bandwidth for almost all the pos- sible flag combinations. the iss filter may be disabled by setting the tuner seek bit to "1". 5.1.4 soft mute and mpx output the demodulator output is passed through muting a ttenuators before becoming available externally for the connection to the stereo decoder. the muting an d output buffering are shared with the am circuit. the fm muting circuit is sensitive to weak field strength and to the presence of adjacent channel. the weak field strength condition (soft mute) is detected by comparing the 1 second-filtered smeter with a pro- grammable threshold. the soft mute depth and slope are software-programmable. the soft mute is followed by the adjacent channel muting circuit. the presence of adjacent channel is de- tected as high frequency noise in the mpx signal, so th at only the adjacent chan nel that is not suppressed by the iss can activate this muting. the filter is de scribed in the quality section. it is desensitized under weak field strength conditions. the adjacent channe l mute threshold/slope and depth are programmable. the output audio amplifier gain can be switched to a +23.5 db setting in wb in order to equalize the fm and wb 100% modulation audio levels. iss-dependent automatic roll-off compensation is implemented before the output buffer. 5.1.5 station detection the station detection function makes use of signal strength measurement and of if counting. the result is available on the sd pin as a logic high value when the tuned channel is considered valid. on the sd pin the two field strength-related and if counter output si gnals are also available separately by suitably pro- gramming the output multiplexer. the field strength-related digital output is derived by comparison of the filtered smeter (the time constant is 1s in reception and 100us in seek mode - s ee quality section) with a programmable threshold. the fm if counter circuit detects whether the if sign al is centered inside a programmable frequency win- dow around the nominal frequency value. the measuring time window is programmable as well. the result
65/74 TDA7514 is available both on the sd pin and in the tuner i 2 c bus read byte. 5.1.6 quality the fm quality section of the TDA7514 generates the control signals for all the quality-related functions. these quality signals are: filtered smeter, adjacent channel content, multipath content. the controlled functions are: agc keying, soft mute, adjacent channel mute, stereo blend, high cut, audio noise blanker. externally available quality signals are also generated by this circuit. these signals are: filtered smeter (analog and digital), adjacent channel content and multipath content. external filtering to generate part of the quality si gnals uses external capacitors: the voltage values on these capacitors can be kept stored during rds af update or fast charged when a new tuned frequency is selected. the smeter filter uses an external capacitor to generate a low-pass time constant of 1 s in reception mode (10 ms for fast car-radio testing), and an all-internal circuit for a low-pass time constant of 100 us for rds af update. the voltage across the capacitor is stored during rds af update; it is fast charged following the 100 us-filtered signal during jumps to a new frequency. the 1s/100us smeter is fed to the station de- tector, to the high cut filter, to the soft mute and to the a-to-d converter. an internally filtered 1ms-time constant smeter is further generated to drive the keyed agc, the iss and the weak field filter desensitization circuits. the stereo blend function is driven by a combination of weak signal strength-, adjacent channel- and mul- tipath-related information through the snc (stereo nois e control) signal. the snc signal is a wired-or of the three conditions and is generated with a peak hol der featuring a 400 ms attack time constant and a 10 s decay time constant. the smeter contribution to the snc is programmable in terms of gain and offset; the same is true for the two other bad quality indicators (filter shape, rectifier offset and gain are program- mable) keeping in mind that the adjacent channel filter and rectifier are shared with the adjacent channel mute circuit and that the multipath filter is shared with the iss multipath detector. the voltage across the external snc filtering capacitor is stored during rds af update, and is driven by a fast charge circuit dur- ing jumps to a new frequency. a fast car-radio test mo de is also available in which the external capacitor is disconnected and substituted for by a much smaller internal capacitor. a faster attack of the stereo blend function in case of sudden onset of adjacent channel or multipath con- ditions is ensured by actually driving the stereo ble nd circuit by a further wired-or circuit sensing the snc voltage as well as the unfiltered multipath and adjacent channel rectifier outputs. the quality signals available to the u-processor are: filtered smeter (on the dedicated buffered smeter pin), the multipath information (on pin qualmpout), a programmable combination of multipath and ad- jacent channel information (on pin qualacmpout), and 6 bit digitized filtered smeter (via the tuner i 2 c bus read byte). 5.2 am tuner section 5.2.1 front end the am tuner front end section consists of a high ip3 mixer whose outputs are common with the fm first mixer. after going through the first fm if1 ceramic filter the signal enters the second mi xer for conversion to the second if of 450 khz where channel selection takes place. the second mixer exhibits a high ip3 value too, and has a fixed gain. the front end agc detects mainly a wide band signal (rf signal from the input pins of the first mixer) and a very narrow band signal (smeter, generated by the signal at the input of the if2 amplifier after channel selection has occurred). a third fairly narrow band input (if1 signal from the input pin of the second mixer) is also available, although the first mixer-input-referr ed ip3 figures of the two mixers make this input gen- erally superfluous. the fe agc starting points on all three input channels are programmable. the fe agc circuit drives the external attenuation p- i-n diodes and the external rf amplifier gain control terminal.
TDA7514 66/74 5.2.2 if noise blanker an if noise blanker circuit is present to detect and remove impulse noise especially at weak field strength levels. the noise spikes are detected at the output of the first mixer and noise cancelling takes place in the second mixer. the necessary delay in the signal path is provided by the if1 ceramic filter. the detection circuit consists of an expressly-built if 1 limiter and smeter detector (not the same used for fm smeter generation), followed by a pulse detector. th e sensitivity of the noise blanker is programmable. the if nb is desensitized at high field strength (usi ng the filtered smeter) and the desensitization thresh- old can be programmed. 5.2.3 if amplifier and detector after channel selection by means of the if2 ceramic filter, the am signal is amplified by a very high gain (up to 70 db, programmable) linear amplifier, and demodulated by an integrated quasi-synchronous de- tector. the phase information for the detector is derived from the if2 limiter (shared with the fm signal path) whose input is the if2 amplifier input pin. the same if2 limiter is used to generate the am smeter information since it uses a narrow band signal and is not subjected to agc. the if2 amplifier ga in is controlled by the agc2 loop. the if2 limiter output is also used to generate the input signal for the am if counter. 5.2.4 audio output the demodulated signal is buffered on the same output pin used for the fm mpx signal and is subjected to the action of the soft mute circuit as well (progr ammable threshold/slope). the controlling signal for this function is the filtered smeter. 5.2.5 station detection station detection in am is done evaluating the fi eld strength and the if2 signal frequency position. the field strength detector (sensing the filtered smeter) has a programmable threshold. the programmability of the if counter is the same as for the fm if counter, albeit with different center frequency, frequency window and sampling time programming. the sd information or the single weak field strength information or if counter result are available at the sd pin. the smeter is available both in analog format (buffered at the smeter pin) and in a 6 bit digital format (tuner i 2 c bus read byte). 5.3 tuning section 5.3.1 vco and dividers one vco is used for both am and fm tuning. to im plement the world tuning concept (one vco applica- tion for all the geographical areas), the vco runs at approximately 200 mhz. digital dividers generate the lo signals suitable for the am and fm 1st mixers. the vco itself is a two-pin base-inp ut collector-output bipolar amplifier. a first divider by 1, 2 and 3 is present to generate th e fm lo frequency and to be fed to the pll. a second divider by 4, 6, 8 and 10 is present to generate the am lo frequency. for fm tuning it is possible to pro- gram whether the mixer works in high- or in low-side injection mode. a 90a phase shift circuit operated on the output of the first divider to generate the i and q portions of the lo for the fm image rejection mixer. 5.3.2 xtal oscillator a 10.25 mhz crystal oscillator is used to generate the refe rence frequency of the tuning pll and of the switched capacitor circuits of the TDA7514. the osci llation frequency can be finely adjusted by program- ming internal capacitors (5 bit).
67/74 TDA7514 5.3.3 pll tuning is achieved thanks to a high speed pll for fast rds operation. the vco input (after the first di- vider) is divided through a swallow counter-divider and compared to the divided 10.25 mhz reference fre- quency (fully programmable divider). in fm the absence of a locked condition can be detected in order to automatically enable the charge pump current and loop filter bandwidth to increase in order to speed up the locking process. automatic switch back to a lower charge pump current and narrower loop filter bandwidth can also be forced by the lock detector, thus achieving a slower but less noisy operation of the tuning loop. both the high and the low values of the charge pump current are programmable. two separate loop filters can be used for optimized am and fm operation. 5.3.4 stereo decoder section the stereo decoder is crossed by both the am and the fm signal. the am signal is only low-pass filtered and subjected to audio noise blanking if necessary; the fm mpx signal is stereo demodulated, low-pass filtered and blanked against impulse noise if necessary. 5.4 fm mode 5.4.1 input stage the fm stereo decoder input stage provides a high-input impedance buffering. the input impedance is opened during the rds af update phase by software or external pin control (programmable function) in order not to discharge the coupling capacitor placed between the tuner output and the stereo decoder in- put, and so speed up the return to normal listening. the audio noise blanker circuit is fed from the stereo decoder buffer output: when the input impedance is open during rds af updat e, the noise blanker is still able to work for a short period of time before the capacitance associated with the buffer input stage is discharged. during rds af update the output of the buffer is mute d to avoid letting transient signals leak through the audio processor section. an additional input series switch has been added to perform the stereo decoder auto zero function (see also audio processor section). this switch must be opened before selecting the tuner as the audio source in order to allow the stereo decoder internal filters to discharge before the offset measurement is per- formed. the input buffer in fm mode is followed by an 80 khz low-pass filter to remove high frequency noise. 5.4.2 pll the buffered mpx signal is fed to a 19 khz-centered band-pass filter and subsequently to a pll used to regenerate the 38 khz carrier for stereo demodulation. the pll compares the pilot tone with the divided output frequency of an internal vco running at 456 khz, locking its operating frequency and phase to that of the pilot tone. the pll status can be stored during the rds af update phase in order to speed up subsequent returning to normal listening conditions. since the vco tuning range is small, the vco needs being adjusted to a setting that ensures lock is achieved when a pilot tone is present. on the current TDA7514 version it is necessary to perform this alignment during the car-radio test phase, by injecting a 19 khz tone into the stereo decoder and changing the vco programming until a lock condition is reached. the presence of a stereo signal is detected in this bl ock by measuring the peak value of the pilot tone and comparing it with a programmable threshold. the resulting information can be read back via i 2 c bus (audio processor/stereo decoder i 2 c read byte). 5.4.3 stereo demodulator and blend the mpx signal is fed to the stereo demodulator where the l and r outputs are derived. in case of a stereo transmission in weak field or bad reception conditions (see fm tuner quality section) a gradual transition
TDA7514 68/74 from stereo to mono is performed. the signal strength thresholds for the automatic stereo blend functions can be set by programming the gain of the smeter co ntribution to the snc signal (compared to a fixed threshold sets the full stereo point) and subsequently programming the voltage threshold against which the snc signal is compared to set the full mono threshold. in case the transmission is stereo, it is possible if so desired to set it to forced mono to improve the re- ceived snr. the TDA7514 stereo demodulator additionally performs the functions of roll-off compensation and pilot cancelling. the amount of the former is prog rammable. the latter function is activated when an fm mpx signal with pilot tone is detected; the function is disabled in am and in fm if no pilot tone is detected. 5.4.4 high cut and de-emphasis filters the l and r signals are low-passed filtered by the hi gh cut and, subsequently, by the de-emphasis filter. the high cut filter consists of a fixed resistor and a 5 bit digitally-controlled binary-weighted capacitor (whose value therefore changes between cmin and cmin + 32 x cstep). the digital control is done by converting the filtered smeter into a 5 bit word. programming the internal resistor value, three possible corner frequency ranges (800 hz - 4 khz, 2 khz - 10 khz, 4 khz - 20 khz) are available. it is possible to force the actual range to be smaller than one of the above mentioned ones by setting: ? the maximum capacitor value (4 position programmable control); ? a 5 bit word to be used as limit (32 possible values), in conjunction with a bit that sets whether this limit is to be used as a maximum or as a minimum; ? it is additionally possible, if so de sired, to keep the high cut filter to a fixed position by sending the position code in the previously mentioned 5 bit register and further setting a dedicated bit; ? the high cut filter can also be defeated via a dedicated bit. the controlling signal for this filter is chiefly the filt ered smeter. it is also poss ible to program the high cut control input selector to use the snc instead of the smeter. the contributions to the snc signal from the smeter, adjacent channel and multipath detectors is the same as for the stereo blend function. the level "0" of the converted signal (corresponding to the maximum filter corner frequency) is obtained when the control signal is equal to or greater than the programmable th reshold vhcch. the level "31" (correspond- ing to the minimum filter corner frequency) is obtained when the control signal is equal to or smaller than the programmable threshold vhccl. no ise blanking is performed at this stage. "corners" in the waveform due to the holding action of the noise blanking circui t are smoothed by the successive de-emphasis filter. the fixed de-emphasis filter can be programmed to 75 us and 50 us; in am mode it is shifted to a seven times higher corner frequency. 5.4.5 am mode in am mode the pll is on though no pilot tone is present; the stereo demodulator is forced to work in the mono configuration and the pilot canceller is off. 5.4.6 input stage the only difference between the am and the fm configuration of the input stage lies in the input imped- ance only (30 kohm for am, 100 kohm for fm). the functions are identical. 5.4.7 delay filter the input stage is followed by a fourth order low-pass filter with a cut-off frequency of approximately 4 khz and a delay of approximately 130 us whose main purpos e is to generate the delay in the signal path nec- essary for audio noise blanking. the filter contributes to the low-pass filtering of the am signal as well. 5.4.8 high cut filter the high cut filter is am can be used both statically by programming a fixed corner frequency (the 800 hz ? 4 khz range has been specifically designed for am although it is available also in fm) or dynamically, exactly like the fm high cut filter. see the fm high cut filter section for further details.
69/74 TDA7514 the de-emphasis filter is shifted to a seven times higher corner frequency in am mode with respect to the fm mode. 5.4.9 audio noise blanker section the operation of the audio noise blanker varies in fm and in am. 5.4.10 fm mode the fm noise blanker triggering circuit acts as a peak-to-average detector on the high-passed mpx sig- nal. the input 140 khz high-pass filter removes the desired audio part so that the impulse noise is more easily detected. the high-pass signal then follows two different paths: ? after rectification it is fed to one terminal of the trigger comparator; the impulse noise is present on this path together with high frequency noise; ? after rectification it is fed to a slow peak detec tor which is not able to follow the impulse noise but whose output (peak signal) represents the white high freq uency noise level; th e output of the slow rectifier is the main input of the threshold generation circuit, whose output is applied to the second terminal of the trigger comparator. the threshold generation circuit gene rates a threshold as a monotonically in creasing function of the peak signal. the function can be programmed in its linear coefficient and in its second order coefficient. for superior performance in the dynamically changi ng car-radio environment the activation threshold is further influenced by three other parameters: field strength, fm frequency deviation and multipath pres- ence. the influence of these parameters can be disabled and is programmable. the parameter influence on the noise blanker sensitivity is as follows: ? field strength: when the field strength decreases the noise blanker less becomes less sensitive (at low field strength white noise becomes higher and false triggering becomes more likely); ? frequency deviation: if the fm frequency deviation is high, the noise blanker becomes less sensitive; this is due to the fact that a large deviation causes a high mpx level which in turn might not be reject- ed enough by the noise blanker detector input high-pass filter, thus causing false triggering; ? multipath: the presence of a strong multipath condition increases the sensitivity of the noise blanker. the triggering comparator output activates a retriggerable monostable circuit whose output drives the "hold" switch in the high cut filter section. the bl anking time is programmable and the whole noise blanker action is defeatable via software. 5.4.11 am mode in am mode the noise blanker detec tor can operate in two different wa ys. for both modes the possibility to low-pass the signal entering the noise blanker detector is foreseen (7.2 khz lp filter software defeat- able), in order to be able to reduce the white noise effect on the detector that may lead to false triggering, especially for am mode 1. 5.4.12 am mode 1 this noise blanker operation mode is similar to the fm operation mode. the input audio signal taken be- fore the delay filter (see stereo decoder in am) can be low-pass filtered (see am mode description above) and is subsequently high-pass filtered with a filter programmable in terms of corner frequency and order. the resulting signal still contains the impulse noise information, high frequency noise (depending on the activation of the 7.2 khz filter) and audio (it is not possible to effectively elim inate all the audio content because the am channel bandwidth - determined by the if 2 ceramic filter - is bare ly wider than the signal bandwidth, and the spectral differences between the impulse noise and the signal are small). the signal is then applied to the same peak-to-averag e detector that is used for fm; the difference is that the deviation detector is not influencing the threshold generation in this case. the noise blanking time, pro- grammable also for am, is about 30 times longer than for fm.
TDA7514 70/74 5.4.13 am mode 2 in this operation mode the detector operates in a much more straightforward configuration: the instanta- neous am audio level is compared with a fixed prog rammable threshold, and the comparison result acti- vates the retriggerable monostable. the advised programmed threshold corresponds to an equivalent 140% am modulation level. 5.5 audio processor section 5.5.1 inputs the audio processor input section features a main c hannel multiplexer, a rear channel multiplexer (rsa, rear seat audio function), an input gain stage and autozero circuit. the main channel multiplexer allows connecting the following sources to the main audio processing path: ? 1 quasi-differential source; ? 1 stereo differential source; ? 1 mono differential source; ? tuner output (am, fm); ? beep generator. the rsa selector (see speaker output section) can connect the rear speaker outputs to the following sources bypassing all the tone and volume control: ? 1 quasi-differential source; ? 1 stereo differential source; ? tuner output (am, fm). the different sources are subjected to the following input attenuations: ? quasi-differential source: -4 db ? stereo differential source: 0 db ? mono differential source: -4 db. the main channel signal path features an input gain stage (0..+15 db, 1 db step) to equalize the different source levels and the autozero circuitry that removes the dc offset generated between the input pins and the input gain stage output. the autozero procedure is automatically run every time byte 0 of the audio processor i 2 c software is ad- dresses, that is every time the main source is changed or the input gain is changed. in case the new source is the stereo decoder the source change must be preceded by opening the stereo decoder input for a time long enough to discharge the stereo decoder internal filters (see stereo decoder input section). the same is true even when the source is switched from am to fm and vice-versa. the autozero proce- dure can be manually activated through a dedicated bit, and can be prevented from running by setting a different dedicated bit. the beep generator is considered a main channel source, and it can generate a 500 hz, 1 khz, 2 khz, 3 khz tone. 5.5.2 soft mute the input stage is followed by a soft mute stage aimed at automatically and smoothly driving the audio processor from its current state into a full mute condition. the overall transition time is software selectable. it is possible to control the stereo decoder rds af update mute circuits (input impedance open switch ("high ohmic mute"), stereo decoder mute and pll hold) from the audio processor soft mute. 5.5.3 loudness filter the TDA7514 features a loudness function made up by a 20 db attenuator in 1 db steps, a second order lp filter with programmable corner frequency and a defeatable high pass filter with programmable corner frequency.
71/74 TDA7514 the attenuator has been realized employing the "soft step" technique that reduces the audible dc click at the speaker outputs by dividing the 1 db step into several smaller-amplitude, longer duration transitions. 5.5.4 volume control the volume stage controls the level over a +15 db..-79 db + mute range in 1 db steps. the volume atten- uator is also realized with the soft step circuitry. 5.5.5 treble filter the treble filter consists of a second order resonating filter with programmable center frequency. the boost/cut range is !15 db in 1 db steps. 5.5.6 bass filter the bass filter consists of a second order resonating filter with programmable center frequency and quality factor. it is also possible to set and defeat the dc mode both in cut and in boost. the boost/cut range is !15 db in 1 db steps and the attenuator features the soft step circuitry. 5.5.7 speaker attenuators the speaker attenuator driver circuit allows separate volume control for each of the four outputs. the level is controlled over a +15 db.. -79 db + mute range in 1 db steps with soft step. an output buffer provides dc shift to a ty pical 4v level and an ac gain of +4 db. the source of each speaker output circuit can be chose among the following configurations: ? tone control output via external ac coupling (coupling shared by front and rear channels); ? tone control output via internal dc coupling (coupling shared by front and rear channels); ? rear seat audio (only for rear channels). it is furthermore possible to mix an external source (typically the chime source) on all the four outputs, selecting on which outputs the mixing must take place (any combination is allowed). the volume of the mixing source cannot be changed internally.
TDA7514 72/74 table 75. tqfp80 mechanical data & package dimensions dim. mm inch min. typ. max. min. typ. max. a 1.60 0.063 a1 0.05 0.15 0.002 0.006 a2 1.35 1.40 1.45 0.053 0.055 0.057 b 0.22 0.32 0.38 0.009 0.013 0.015 c 0.09 0.20 0.003 0.008 d 16.00 0.630 d1 14.00 0.551 d3 12.35 0.295 e 0.65 0.0256 e 16.00 0.630 e1 14.00 0.551 e3 12.35 0.486 l 0.45 0.60 0.75 0.018 0.024 0.030 l1 1.00 0.0393 k3.5 (min.), 7 (max.) tqfp80 (14x14x1.40mm) a a2 a1 seating plane c 20 21 40 41 60 61 80 e3 d3 e1 e d1 d e 1 b tqfp80l 0.10mm .004 pin 1 identification k l l1 0.25mm gage plane outline and mechanical data
73/74 TDA7514 table 76. revision history date revision description of changes june 2005 1 first issue
information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the co nsequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publicati on are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics prod ucts are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectro nics. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners ? 2005 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com 74/74 TDA7514

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