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? e93503-te sony reserves the right to change products and specifications without prior notice. this information does not convey any license by any implication or otherwise under any patents or other right. application circuits shown, if any, are typical examples illustrating the operation of the devices. sony cannot assume responsibility for any problems arising out of the use of these circuits. absolute maximum ratings (ta=25?) ?supply voltage vcc 12 v ?operating temperature topr ?0 to +85 ? ?storage temperature tstg ?5 to +150 ? ?allowable power dissipation p d 430 mw recommended operating condition supply voltage vcc 6.5 to 11 v description the CXA1580Q is an ic designed for use in car stereos. functions include dolby b type noise reduction, playback equalizer and interval detection between tracks (music sensor) into a single chip. features ?few external parts ?forward/reverse head switching ?3-input selector switch (tape, cd, radio) ?small package (40-pin qfp) ?dolby b type noise reduction and playback equalizer into a single chip ?same pin configuration as dolby b/c type noise reduction system (cxa1581) ?interval detection level between tracks can be set by external resistors/capacitors (2 modes). applications ?car stereos ?stereo cassette deck players (playback only) structure bipolar silicon monolithic ic dolby b type noise reduction system with playback equalizer 40 pin qfp (plastic) CXA1580Q * ?olby?and the double d symbols are trademarks of dolby laboratories licensing corporation.
? cxd1580q auxsw tapesw drsw nrsw mssw modesw g1 (ff) g2 (nor) mstc msout msgnd tc2 nc2 d iref cdin2 insw tc1 nc1 lineout1 vct cdin1 radioin1 tapein1 gnd pbout1 pbtc1 pbfb1 pbrin1 pbfin1 pbgnd e iref 300k 300k 300k 300k radio/cd radio/cd 10db lp f de t ms mode nr dr ta pe aux in g1/g2 22 21 23 24 25 26 27 28 29 30 20 19 18 17 16 15 14 13 12 1 2 3 4 5 6 7 8 9 10 11 31 32 33 34 35 36 37 38 39 40 tape/aux lineout2 tape/aux pbfin2 pbrin2 pbfb2 pbtc2 tapein2 radioin2 pbout2 v cc block diagram and pin configuration
? cxd1580q pin description (ta=25?, vcc=8.0v, no signal) pin symbol dc i/o equivalent circuit description no. value resistance 1 pbout 2.8v 30 32 pbfb 1.4v 150k 39 33 pbin 0v 70k 34 37 38 2 vcc 8.0v 10 gnd 0.0v 29 msgnd 35 pbgnd 31 pbtc 40 36 e iref 1.25v 11 msout pbeq output pbeq feedback pbeq input power supply ground pbeq capacitance connection of reference current setting resistor for pbeq block. ms output 147 42 30 vcc gnd 31 40 147 10 1.25v vcc gnd 36 147 vcc gnd 10k v dd =5v 11 refer to page 6. 0.0v for signal detection; 5.0v for no signal detection
? cxd1580q pin symbol dc i/o equivalent circuit description no. value resistance 12 mstc 13 g2(nor) 4.0v 14 g1(ff) 3 tapein 4.0v 40k 28 4 radioin 27 5 cdin 26 6 d iref 1.25v 7 lineout 4.0v 24 connection of ms detection time constant ms feedback tape input radio input cd input connection of reference current setting resistor for dolby block line output 147 vcc gnd 1k 50 v dd 12 100k 147 vcc gnd 100 10 14 13 147 vcc gnd 40k 15 to vgs 26 27 28 3 4 5 147 50 1.25v vcc gnd 8k 6 147 vcc gnd 200 200 7 24 approx. 1.4v for signal detection; 5.0v for no signal detection
? cxd1580q pin symbol dc i/o equivalent circuit description no. value resistance 9 tc 0.3v 22 15 modesw 17 nrsw 18 drsw 19 tapesw 20 auxsw 21 insw 16 mssw 25 vct 4.0v 8nc 23 connection of dolby detection capacitor refer to page 6. refer to page 6. vcc/2 output no connection. vcc gnd 20k 6 600k 22 9 0.5 0.5 147 x2 147 vcc gnd 50 21 20 19 18 17 15 147 vcc gnd 50 50 16 147 vcc gnd to vgs 45k 30k 30k 50 25
? cxd1580q * pbout, pbfb, pbin equivalent circuit * description for sw pins modesw - switching of ms signal detection/blank detection high: g1 (signal detection); low: g2 (blank detection) nrsw - switching of dolby b type noise reduction on/off high: noise reduction off; low: dolby b drsw - switching of tape rotation high: reverse; low: forward tapesw - switching of high/normal tape high: normal tape; low: high tape auxsw - switching of cd/radio in the aux mode high: cd; low: radio insw - switching of tape/aux high: tape; low: aux mssw - switching of ms on/off high: ms on; low: ms off out fb in 147 147 147 70k 300k 300k 1k 1k vcc v reg gnd
? cxd1580q electrical characteristics (ta=25?, vcc=8.0v, rl: output load resistance, rg: head equivalent impedance) *120?, fwd mode, nr off, ms off unless otherwise specified. icc no signal v tin lineout= 0 db 1khz v rin lineout= 0 db 1khz v cin lineout= 0 db 1khz bp1 tapein 500hz nr-on vlo=?5db bp2 tapein 2khz nr-on vlo=?5db bp3 tapein 5khz nr-on vlo=?5db bp4 tapein 10khz nr-on vlo=?0db bp5 tapein 10khz nr-on vlo=0db thd1 tapein ?0dbm 1khz rl=2.7k thd2 tapein ?0dbm 1khz nron rl=2.7k thd3 radioin ?0dbm 1khz rl=2.7k thd4 cdin ?0dbm 1khz rl=2.7k sn1 no signal nr on ccir/arm filter v omax 1 1khz thd=1% rl=2.7k ct1 tapein ?4dbm 1khz ct2 radioin ?4dbm 1khz ct3 tapein ?4dbm 1khz vos1 no signal pbref pbfin 315hz ?0dbm vpbo=0db f120f pbfin 2.7khz ?8.5dbm for 315hz f70f pbfin 4.5khz ?3.8dbm for 315hz f120r pbrin 315hz ?0dbm for 315hz v omax 2 pbfin 1khz thd=1% rl=2.7k thd5 pbfin 1khz ?2dbm rl=2.7k sn2 no signal "a" weighting filter vos2 no signal rg=2.2k ct4 tapein 1khz ?2dbm ct5 vms1 tapein 5khz ams on (g1 mode) vms2 tapein 5khz ams on (g2 mode) i oh tapein 5khz -10dbm, 5v applied to amsout v ol tapein 5khz -30dbm, 1ma applied to amsout v il auxsw, modesw, insw, mssw, v ih tapesw, nrsw, drsw 9.0 12.4 16.0 ma ?2.0 ?0.0 ?8.0 dbm 1.4 2.9 4.4 db 5.5 6.4 8.5 3.9 5.2 6.9 9.7 10.4 11.9 ?.1 0.4 1.9 0.02 0.2 % 77.0 82.8 db 13.0 14.4 db ?7 ?5 db ?6 ?0 ?7 ?5 3.9 4.0 4.1 v ?7.0 ?5.0 ?3.0 dbm ?.5 0.0 1.5 db ?.0 0.0 1.0 ?0.0 3.0 dbm 0.07 0.5 % 55.0 58.0 db 2.4 2.8 3.2 v ?8 ?0 db ?5 ?5 ?5 dbm ?5 0.0 1.0 ? 0.0 1.0 v 0.0 1.0 v 2.5 vcc v current consumption tapein input sensitivity radioin input sensitivity cdin input sensitivity decode boost 1 decode boost 2 decode boost 3 decode boost 4 decode boost 5 tapein total harmonic distortion 1 tapein total harmonic distortion 2 radioin total harmonic distortion cdin total harmonic distortion decode s/n ratio signal handling cross talk tapein ? cdin cross talk radioin ? cdin cross talk tapein 1ch ? 2ch lineout offset voltage 120? fwd frequency characteristics 120? fwd frequency characteristics 70? fwd frequency characteristics 120? rvs frequency characteristics signal handling total harmonic distortion s/n ratio output offset voltage cross talk between channels cross talk between rvs and fwd signal detection level 1 signal detection level 2 ms output leak current ms output saturation voltage logic voltage item symbol measurement conditions* min. typ. max. unit (input pin, input level, frequency etc.) dolby block (dolby level -6dbm=0db) playback equalizer amplifier block interval detection between tracks (music sensor) block
? cxd1580q description of operation operation mode control (insw, auxsw, tapesw, drsw, nrsw, mssw, modesw) the CXA1580Q has built in electronic switch circuits and the operations are controlled by the direct current applied to each sw pin. the operation mode state for each switch is shown in the table below. click noise can be reduced by the external cr time constant circuit for nr sw switching. sw function for low input function for high input insw aux (cd/radio) in tape in auxsw radio cd tapesw 70? 120? drsw pb fwd pb rvs nrsw dolby b nr nr off mssw ms off ms on modesw g2(nor) mode g1(ff) mode
? cxd1580q 24 23 22 21 20 19 18 17 16 1 5 14 9 11 12 13 8 7 6 5 4 3 2 1 31 30 29 28 32 33 34 35 36 37 38 39 40 25 10 auxsw tapesw drsw nrsw mssw modesw g1(ff) g2(nor) mstc msout msgnd tc2 nc2 lineout2 d iref cdin2 radioin2 tapein2 vcc pbout2 insw tc1 nc1 lineout1 vct cdin1 radioin1 tapein1 gnd pbout1 pbtc1 pbfb1 pbrin1 pbfin1 pbgnd e iref pbfin2 pbrin2 pbfb2 pbtc2 27 26 CXA1580Q 0.1 c21 0.1 c23 r29 2.7k 2.2 c19 r28 18k 5.1k r26 s12 s10 s8 r20 5.1k 5.1k r18 r22 r24 138.5k 100k r16 100k c16 1 c14 1 c12 1 c11 10 c9 10 r33 1meg 0.1 c25 r39 r38 s20 s21 r37 s22 r36 s23 r35 s24 r34 s25 10k 100 100 10k 100 10k c26 1.5 r31 1k r32 10k c27 0.015 v7 v6 v5 v3 v2 v1 0.1 c24 0.1 c22 c29 10 c18 1 c17 c15 1 1 c13 5.1k r27 5.1k 5.1k r21 r17 100k r25 100k r23 138.5k r19 1 c10 s5 s6 2.7k r11 2.7k r14 270 r12 270 r13 33 c2 10n c8 s1 s2 2.2k r10 c6 2.2k r9 4.7 c5 2.2k r8 4.7 c4 r15 s4 2.2k r7 4.7 c3 s3 33 c1 10n c7 15k audio sg gnd r1 1.2k 1.2k r2 power supply vcc dc ammeter r6 19.2k r5 19.2k r4 19.2k r3 19.2k r43 s16 r42 s17 r41 s18 r40 s19 10k 10k 100 100 oscillo -scope distortion analyzer ac voltmeter ccir 1khz bpf din audio "a" wtg dc voltmeter amp gnd gnd off : 0db on : 30db r44 50k s26 0db or 30db s28 s29 s30 s31 s32 s14 s15 s13 2.7k r30 22 s11 s9 s7 4.7 a v4 electrical characteristics measurement circuit
?0 cxd1580q auxsw tapesw drsw nrsw mssw modesw g1 g2 mstc msout msgnd tc2 lineout2 d iref cdin2 radioin2 tapein2 vcc pbout2 insw tc1 lineout1 vct cdin1 radioin1 tapein1 gnd pbtc1 pbfb1 pbrin1 pbfin1 pbgnd e iref pbfin2 pbrin2 pbfb2 pbtc2 300k 300k 300k 300k tape/aux radio/cd tape/aux radio/cd 10db lpf det ms mode nr dr tape aux in g1/g2 1k r10 r9 10k c18 0.015 c19 1.5 (h : g1, l : g2) c17 0.1 r8 1meg r7 100k l : signal exist h : no signal c20 22 r11 22k h : off, l : dolby b h : mson, l : msoff h : rvs, l : fwd h : cd, l : radio h : tape, l : aux v dd to microcomputer 0.1 c15 c13 2.2 c12 0.22 10 c10 c8 0.22 c6 0.22 pbout1 nc1 1k r4 r3 1k c2 16 c4 10n c1 16 c3 10n r5 15k c7 0.22 8v c5 10 0.22 c11 0.22 r6 18k c14 2.2 c16 0.1 nc2 pb head h : 120s, l : 70s c9 mssw 300k 300k 300k 300k tape/aux radio/cd tape/aux radio/cd 10db lpf det ms mode nr dr tape aux in g1/g2 fwd1 rev1 rvs2 fwd2 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 31 32 33 34 35 36 37 38 39 40 22 21 23 24 25 26 27 28 29 30 application circuit application circuits shown are typical examples illustrating the operation of the devices. sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.
(1) signal route fig. 1 op1 and op2 are operational amplifiers. op1 compose the playback equalizer by attaching a resistor and a capacitor to pbfb pin, and a capacitor to pbtc pin. op2 is an input selector and a lineout amplifier. the gain of lineout amplifier is 24 db. reference input level for dolby is -30 dbm. the adjustment method of playback equalizer is described in the paragraph (3). (2) level diagram ?1 cxd1580q op 2 4db 20db 20db aux tape op 1 pbfb pbtc pbout dolby level (?0dbm) tapein cdin rad ioin (?dbm) lineout pbin f r 0dbm ?0 ?5 ?0 ?5 ?0 ?5 ?0 ?5 ?0 ?5 ?0 ?5 ?0 ?5 p b i n vr adjustment 30dbm 30dbm (400hz 217nw b/m) dolby level 30dbm 30dbm 6dbm dolby level 70dbm (315hz 160n/w b/m) ? p b o u t t a p e i n c d i n r a d i o i n l i n e o u t
?2 cxd1580q (3) adjustment of playback equalizer fig. 3 1) adjustment of eq curve gain difference (= adjustment of internal variable r) ? e iref resistor the internal variable resistor ri should be adjusted to adjust the eq curve gain differences (g1-g2), (g1- g3). therefore, adjust the external resistor r4 for e iref pin. 2) ac gain adjustment ? external resistor r1 the external resistor r1 should be adjusted to adjust the ac gain. g1, g2 and g3 are obtained by the following equations. [ac gain can be also adjusted by attaching vr to pbout pin, fixing r1. however, the low-band cut-off frequency can be more lowered by r1 adjustment method with the same c1 value used for this method.] 3) low-band cut-off frequency ? external resistor r1 and external capacitor c1 the low-band cut-off frequency (fc) can be determined by the external resistor r1 and external capacitor c1. r1 c2 c1 pbfb 3 2 pbtc pbout r3 e iref r4 1 g1 g2 g3 pbin fr ri 3 2 1 fc fig. 4 r1+r3 r1+ri g1=20log g2=g3=20log r1 r1
?3 cxd1580q (4) ms (interval detection between tracks) adjustment method fig. 5 1) ms gain (g1/g2 mode gain) adjustment ? external resistors r1, r2 ms gain is expressed by the following equations. 2) ms cut-off frequency adjustment ? external resistors r1, r2 and external capacitors c1, c2 the external resistors r1, r2 and external capacitors c1, c2 should be adjusted to adjust the low-band cut- off frequency of ms frequency characteristics. r1+ri r2+ri g1=10+20log (db) g2=10+20log (db) r1 r2 det g2 g1 msout tapein nor (bs) ff (ams) 10db 25khz lpf ri g1 g2 r1 r2 c1 c2 2 1 mstc 2 1 2 1 2 1
?4 cxd1580q characteristics graphs sup p ly voltage [v] 7.0 8.0 9.0 10.0 11.0 12.0 11.5 12.0 12.5 c urre nt co nsump tio n [ma] c urre nt co nsump tio n vs. sup p ly vo ltag e for no signal nr off, m s off 50 100 1k 10k playb ack equalizer frequency characteristics g ain [db ] frequency [hz] 60 50 40 30 120? 70? out 300k 0.01 33 270 10 8 6 4 2 0 1k 100 10k v cc=8.0v 0db=dolb y level decode b oost frequency characteristics decode b oost [db] frequency [hz] ?0db ?0db ?0db ?0db 0db ta=25?c ta=25?c ta=25?c v cc=8.0v nr off, m s off outp ut level 25dbm constant
?5 cxd1580q ?4 20 ?6 12 ? ? 0 10 0 10 1 total harmonic distortion (p re-amp lifier b lock) distortion [%] o utp ut level [db m] ? ? 2 6 10 14 10 ? 10 ? 10 0 total harmonic distortion (dolb y b lock) distortion [%] o utp ut level [db m] inp ut : tapein1 o utp ut : lineout1 vcc=8.0v 0db=dolb y level on f=100hz off f= 1khz on f=10khz off f=1khz ?0 1k 100 10k v cc= 8. 0v r l =2.7k r ip p le elimination ratio (pb o u t) r ip p le elimination ratio [db ] frequency [hz] ?0 ?0 ?0 ?0 ?0 ?0 0 ?0 1k 100 10k v cc=8.0v r ip p le elimination ratio (lin eo u t) r ip p le elimination ratio [db ] frequency [hz] ?0 ?0 ?0 ?0 ?0 ?0 0 nr off nr on f=10khz f=1khz f=100hz inp ut : pb fin1 o utp ut : pb o u t1 vcc=8.0v 10 ? ta=25?c ta=25?c ta=25?c ta=25?c w
?6 cxd1580q ?0 ?0 1k 100 10k c ro ss talk b e twe e n channe ls (1ch ? 2ch) cross talk [db ] frequency [hz] 20 ?0 ?0 ?0 ?0 v cc=8.0v input : pbfin1 outp ut : lineout1 ?0 ?0 1k 100 10k blank detection level frequency characteristics inp ut level [db m] frequency [hz] 20 ?0 ?0 ?0 ?0 v cc=8.0v ta=25?c input : tapein1 hpf gain 40db hpf gain 20db ?0 ?0 ?0 ?0 ?0 10 20 30 40 50 60 ms b lock gain vs. blank detection level inp ut level [db m] hpf gain [db ] v cc=8.0v ta=25?c input : tapein1 f=1khz ta=25?c ta=25?c ta=25?c
?7 cxd1580q sony code eiaj code jedec code package material lead treatment lead material package weight epoxy resin solder / palladium copper / 42 alloy package structure plating 0.2g qfp-40p-l01 * qfp040-p-0707 40pin qfp (plastic) 9.0 0.4 + 0.4 0.3 ?0.1 0.65 1 10 11 20 21 30 31 40 1.5 ?0.15 + 0.35 0.127 ?0.05 + 0.1 (8.0) a a detail 0.1 ?0.1 + 0.15 + 0.15 7.0 ?0.1 0.5 0.2 0.1 m 0.12 package outline unit : mm

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