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? e93930d78 sony reserves the right to change products and specifications without prior notice. this information does not convey any licens e by any implication or otherwise under any patents or other right. application circuits shown, if any, are typical examples illustr ating the operation of the devices. sony cannot assume responsibility for any problems arising out of the use of these circuits. dolby b type noise reduction system with recording/playback equalizer CXA1897Q absolute maximum ratings (ta=25?) supply voltage v cc 12 v operating temperature topr ?0 to +75 ? storage temperature tstg ?5 to +150 ? allowable power dissipation p d 735 mw operating conditions supply voltage v cc 6.5 to 10.0 v description the CXA1897Q is an analog signal processing ic for tape recorders. it achieves whole processing operations for the recording and playback systems which include the dolby b noise reduction function on a single chip. this ic supports 2 channels at each function. features dolby b noise reduction supports 1.7 times normal speed. recording/playback equalizer amplifier supports 1.7 times normal speed. built-in comparator for ams (automatic music sensor) built-in agc (automatic gain control) with amplifier for mpx filter. playback equalizer outputs independently for deck-a and deck-b. externally adjustable recording equalizer gp and fp. built-in recording mute function. double cassette dubbing system can be easily configured just with this ic. applications all analog signal processing in cassette deck parts of tape recorders and compact music centers (sankyo seiki mfg. co., ltd. yk47r-kf202 or equivalent which has the same head type.) structure bipolar silicon monolithic ic 48 pin qfp (plastic) * these ics are available only to the licensees of dolby laboratories licensing corporation from whom licensing and applications information may be obtained. * "dolby" and the double d symbols are trade marks of dolby laboratories licensing corporation.
2 CXA1897Q block diagram 10 4 pb outb2 pb out a2 pb fb22 pb fb12 pb inb2 pb ina2 pb ina1 pb inb1 gnd pb fb1 1 pb fb21 pb out a1 pb outb1 gnd gnd gnd gnd deck a pb head vcc rfc ams out vcc ams gain agc in gnd gnd gnd agc out d rec in1 gnd d iref d pb in1 dolby nr on/off/hi d l out1 gnd tc gnd mpx iref d rec in2 gnd gnd d r out1 rec in deck a/b deck a eq deck b eq (n/cr/me) (120/70us) rec pb deck b r/p head rec out1 rec out2 fp cal gp cal rec pb gnd gnd speed rec in d r out2 gnd gnd gnd gnd tc d l out2 dolby nr rec/pb d pb in2 gnd rec mute agc out gnd gnd gnd gnd vg iref agc in agc tc gnd mpx gnd gnd gnd gnd gnd gnd gnd gnd 40k 10k 10db amp 10db amp 40k 10k iref mute agc rec eq rec eq pbeq ctl receq ctl ams vcc nr nr + 24 23 22 21 20 19 18 17 16 15 14 9 1 1 12 13 8 7 6 5 3 2 1 31 30 29 28 27 26 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 25 + + + + + + + + + + + + + + + + + + + + + +
3 CXA1897Q pin configuration 24 23 22 21 20 19 18 17 16 15 14 9 1 1 12 13 8 7 6 5 4 3 2 1 31 30 29 28 27 26 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 25 10 vcc rfc ams out ams gain agc in1 agc out1 d recin1 d iref d pbin1 nrsw d l out1 d tc1 gnd iref vg agc tc agc in2 agc out2 d recin2 rec mute d pbin2 mode d l out2 d tc2 d r out2 rec in2 gp cal fp cal speed rec out2 rec out1 b eq a eq deck ab rec in1 d r out1 pb outb2 pb out a2 pb fb22 pb fb12 pb inb2 pb ina2 pb ina1 pb inb1 pb fb1 1 pb fb 21 pb out a1 pb outb1 CXA1897Q
4 CXA1897Q pin description (ta=25 c, vcc=8 v, no signals) pin symbol dc i/o i/o equivalent circuit description no. voltage resistance 1 vcc 8.0v 2 rfc 8.0v 3 ams out 8.0v o 4 ams gain 2.8v 5 agc in1 4.0v i 50k 32 agc in2 power supply pin. connects the resistor and capacitor for providing a ripple eliminated stable voltage in the power supply. ams output pin. connects the resistor and capacitor which determine the attack and recovery time constants of the output to vcc. no signal supplied ? high level signal supplied ? low level connects the resistor which determines the ams signal detection level. agc signal input pin. the input resistance varies from 50k to 10k . agc is applied when a signal of ?0db or more level is input to agc. (pin 33 external 47 f // 300k ) 2 vcc gnd 147 3 3 vcc 250 to rfs 3 vcc gnd 147 2 4 vcc gnd 147 2 vcc 10k 5p 32 vcc gnd 147 vcc 10k 40k 5 vgs 4 1 vcc
5 CXA1897Q pin symbol dc i/o i/o equivalent circuit description no. voltage resistance 6 agc out1 4.0v o 147 31 agc out2 7 d recin1 4.0v i 40k 30 d recin2 9 d pbin1 4.0v i 40k 28 d pbin2 8 d iref 1.2v 10 nrsw 2.5v i 53k (for open) agc output pin. dolby nr recording (encoding) input pin. dolby nr playback (decoding) input pin. connects the 18k resistor for providing the reference current of the dolby nr section internal filter. dolby nr on/off switch. low : on medium : off high : 1.7 times normal speed vcc gnd 147 vgs 21k 500 500 2 4 5k 10k vcc 6 31 7 30 28 vcc gnd 147 vcc 40k 15k 9 15k vgs vgs vcc gnd 147 4k 2 4 vcc 8 vcc gnd 147 50k 5k 5k 10 gnd vcc
6 CXA1897Q pin symbol dc i/o i/o equivalent circuit description no. voltage resistance 11 d l out1 4.0v o 147 26 d l out2 12 d tc1 0.3v 25 d tc2 13 d r out1 4.0v o 147 24 d r out2 14 rec in1 4.0v i 50k 23 rec in2 dolby nr line (decoding) output pin. connects the capacitors (0.1 f) which determine the time constants of the input signal level detector. dolby nr recording (encoding) output pin. recording equalizer input pin. 1 1 26 vcc gnd 147 vcc 6k 200 200 10 gnd 2 25 vcc gnd 147 vcc 700k 20k 2 gnd 12 24 vcc gnd 147 300 gnd vcc 13k 10k 300 10 2 13 23 vcc gnd 147 vcc 50k 23k gnd 1.8k 14 vgs vgs
7 CXA1897Q pin symbol dc i/o i/o equivalent circuit description no. voltage resistance 15 deck ab i 16 a eq 20 speed 27 mode 17 b eq 2.5v i 53k (for open) 18 rec out1 4.0v o 147 19 rec out2 15 playback input deck a/b selector switch low : pb ina high : pb inb 16 deck a equalizer selector switch. low : 120 s eq high : 70 s eq 20 recording/playback equalizer speed selector switch. low : normal speed high : high speed (1.7 times normal speed) 27 dolby nr mode selector switch. low : recording (encoding) high : playback (decoding) deck b equalizer selector switch. low : normal tape, 120 s eq medium : cro 2 tape, 70 s eq high : metal tape, 70 s eq recording equalizer output. 20 15 27 vcc gnd 147 vcc gnd 16 vcc gnd 147 50k 5k 5k gnd vcc 17 19 vcc gnd 147 500 gnd vcc 500 3 10 2 40k 5p 18
8 CXA1897Q pin symbol dc i/o i/o equivalent circuit description no. voltage resistance 21 fp cal 1.2v 35 iref 22 gp cal 1.2v 29 rec mute i 33 agc tc 0.0v 34 vg 4.0v 60k connects the resistor to determine the high-band peak frequency of the recording equalizer. reference setting resistance is 27k . connects the 12k resistor to determine each gain of the equalizers. connects the resistor to determine the high-band peak gain of the recording equalizer. reference setting resistance is 27k . recording mute on/off selector switch. low : muting on high : muting off * fader function can be achieved with an external time constant circuit. connects the resistor and capacitor to determine the attack and recovery time constants of the agc. signal reference voltage. connects the capacitor for eliminating ripple. 35 vcc vcc gnd 2 5p 147 gnd 21 vcc vcc gnd 2 147 gnd 22 30k vcc gnd 147 vcc 20k 2 gnd 20k 2 50 m a 2.7v 29 vcc gnd 147 vcc 200 2 gnd 500 2 2 5k 100k 200 500 33 vcc gnd 147 500 gnd vcc 2 34 45k 500 4 2 30k 30k v s g
9 CXA1897Q pin symbol dc i/o i/o equivalent circuit description no. voltage resistance 36 gnd 0.0v 43 pb ina1 0.0v i 70k 42 pb ina2 44 pb inb1 41 pb inb2 45 pb fb11 1.4v 105k 40 pb fb12 46 pb fb21 2.8v 39 pb fb22 47 pb outa1 38 pb outa2 2.8v o 48 pb outb1 37 pb outb2 gnd pin. playback equalizer input pin. playback equalizer negative feedback pin. connects the capacitors which determine the 120 s, 70 s or other time constant of the playback equalizer. playback equalizer output pin. the pin selected by the deck ab switching has a low output resistance; the other pin has a 50k output resistance. 40 41 42 43 45 5p vcc gnd 147 gnd 6 10k 70k 6 10k vcc vcc rfs 1k 1k 147 210k 210k vcc 44 gnd 2 vcc gnd 147 gnd rfs 3 7k 39 46 gnd 3 4 4 2k 2k 37 38 47 48 vcc gnd 147 500 gnd vcc 500 3 6 5k 50k 5k 2 2 rfs on/off on/off 36 gnd 147 50k
10 CXA1897Q electrical characteristics (ta=25 c, v cc =8.0v) item conditions min. typ. max. unit operating voltage 6.5 8.0 10.0 v current consumption no signal 15.0 19.5 24.0 ma item conditions min. typ. max. unit agc on output level 1khz, ?5dbm, agc tc external 47 f // 300k ?4.0 ?2.5 ?0.0 dbm agc on channel balance 1khz, ?5dbm, agc tc external 47 f // 300k ?.0 0.0 2.0 db agc on distortion 1khz, 0dbm, agc tc external 47 f // 300k 0.1 1.5 % agc item conditions min. typ. max. unit f=315hz, vin=?0dbm reference level ?7.0 ?5.0 ?3.0 dbm f=2.7khz, vin=?8.5dbm, against 315hz ?.5 ?.1 1.5 db f=4.5khz, vin=?3.8dbm, against 315hz ?.5 0.3 1.5 db f=5.3khz, vin=?2.5dbm, against 315hz 0.1 1.3 3.1 db f=9.1khz, vin=?7.8dbm, against 315hz 0.1 1.6 3.1 db 120 s-norm mode, f=1khz, r l =2.7k , thd+n=1% ?0.0 ?.0 dbm 120 s-norm mode, f=1khz, r l =2.7k , vin=?2dbm 0.3 0.7 % 120 s-norm mode, rg=2.2k , "a" wtg filter 55 62 db 120 s-norm, rg=70k 2.40 2.70 3.20 v 120 s norm mode frequency characteristics 70 s norm mode frequency characteristics 120 s high mode frequency characteristics 70 s high mode frequency characteristics signal handling total harmonic distortion s/n ratio output offset voltage playback equalizer amplifier block item conditions min. typ. max. unit no signal detection ams gain=4.7k , 1khz level reference output level for pb equalizer system ?3.0 db (?5.0dbm) ams
11 CXA1897Q item conditions min. typ. max. unit reference input level reference output level s/n ratio signal handling total harmonic distortion output offset voltage norm-norm mode against norm-norm frequency characteristics mode at 315hz, ?0db cro 2 -norm mode against norm-norm frequency characteristics mode at 315hz, ?0db metal-norm mode against norm-norm frequency characteristics mode at 315hz, ?0db norm-high mode against norm-norm frequency characteristics mode at 315hz, ?0db cro 2 -high mode against norm-norm frequency characteristics mode at 315hz, ?0db metal-high mode against norm-norm frequency characteristics mode at 315hz, ?0db maximum muting amount muting characteristics norm-norm, 315hz ?9.4 ?7.9 ?6.4 dbm norm-norm, 315hz ?0.0 dbm rg=5.1k, "a"-wtg filter 57.0 60.6 db norm-norm, r l =2.7k , 1khz, thd=1% 8.0 8.8 db norm-norm, r l =2.7k , 1khz, 0db 0.2 0.5 % norm-norm 3.6 4.0 4.4 v 3khz, ?0db ?.3 ?.2 1.1 db 8khz, ?0db 3.7 5.7 7.3 db 12khz, ?0db 10.4 13.4 16.4 db 3khz, ?0db 1.8 3.0 4.2 db 8khz, ?0db 6.7 8.4 9.7 db 12khz, ?0db 13.2 15.8 18.2 db 3khz, ?0db 3.3 4.5 5.7 db 8khz, ?0db 5.9 7.4 8.9 db 12khz, ?0db 11.3 13.7 15.8 db 5khz, ?0db ?.7 0.2 1.7 db 15khz, ?0db 8.3 10.5 12.3 db 20khz, ?0db 13.5 16.7 19.5 db 5khz, ?0db 3.6 4.9 6.0 db 15khz, ?0db 12.0 14.2 16.0 db 20khz, ?0db 17.0 20.0 22.5 db 5khz, ?0db 4.9 6.1 7.3 db 15khz, ?0db 10.5 12.4 14.0 db 20khz, ?0db 14.7 17.4 19.7 db norm-norm mode, 1khz, +8db ?00 ?0 db norm-norm mode, 1khz, ?.0 ?.6 ?.0 db 2.0v (mute pin voltage) recording equalizer amplifier block
12 CXA1897Q item conditions min. typ. max. unit pb, nr-off, 1khz, d-r-out ?0dbm ?2 ?0 ?8 dbm rec, nr-off, 1khz, d-r-out ?0dbm ?2 ?0 ?8 dbm rec, nr-off, 1khz, d-r-out ?0dbm ? ? 5 dbm dolby nr rec out pin (0db) ?0 dbm rec, nr-on, 500hz ?5db 1.4 3.0 4.4 db rec, nr-on, 2khz ?5db 5.5 6.3 8.5 db rec, nr-on, 5khz ?5db 3.9 5.0 6.9 db rec, nr-on, 10khz, ?0db 9.7 10.6 11.9 db rec, nr-on, 10khz 0db ?.1 0.7 1.9 db rec, nr-?.7 times, 850hz ?5db 1.4 3.1 4.4 db rec, nr-?.7 times, 8.5khz ?5db 3.9 5.1 6.9 db rec, nr-?.7 times, 17khz ?0db 9.7 10.4 11.9 db rec, nr-off, 1khz, thd+n=1% 14.0 15.5 db rec, nr-off, 1khz, 10db 0.01 0.2 % rec, nr-on, 1khz, 10db 0.03 0.2 % rec, nr-on, ccir-filter 65.0 66.5 db pb, nr-off, 1khz, 0db ?5 db rec, nr-off, 1khz, 0db ?0 db rec, nr-off, 1khz, 0db ?5 db rec, nr-off, 1khz, 0db ?5 db pb in input sensitivity rec in input sensitivity lineout level dolby level encode boost 1-(1) encode boost 1-(2) encode boost 1-(3) encode boost 1-(4) encode boost 1-(5) encode boost 2-(1) encode boost 2-(2) encode boost 2-(3) signal handling total harmonic distortion (1) total harmonic distortion (2) encode s/n ratio (rec-pb) (pb-rec) (rec 1ch-2ch) (pb 1ch-2ch) dolby block cross talk
13 CXA1897Q note) norm-norm : normal tape-normal speed norm-high : normal tape-high speed cro 2 -norm : cro 2 tape-normal speed cro 2 -high : cro 2 tape-high speed metal-norm : metal tape-normal speed metal-high : metal tape-high speed 120 s-norm : eq=120 s-normal speed 120 s-high : eq=120 s-high speed 70 s-norm : eq=70 s-normal speed 70 s-high : eq=70 s-high speed item conditions min. typ. max. unit control voltage "l" level 1 nrsw (10pin), b eq (17pin) 0.0 0.5 v control voltage "m" level 1 nrsw (10pin), b eq (17pin) 2.2 2.8 v control voltage "h" level 1 nrsw (10pin), b eq (17pin) 4.2 vcc v control voltage "l" level 2 rec mute (29pin) 0.0 0.5 v control voltage "h" level 2 rec mute (29pin) 3.5 vcc v control voltage "l" level 3 other control pins 0.0 0.5 v control voltage "h" level 3 other control pins 2.5 vcc v
14 CXA1897Q 6 7 8 9 10 1 1 12 5 4 3 2 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 2.2k 2.2k + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + r1* 1.2k r2* 1.2k c1 22 m /25v gnd r10* r9* r8* r7* r6* 1 + r5* r4* r3* gnd 68k 27k 68k 27k 27k 68k 27k 68k r20* v1 s5a 2.7k r12* c13 4.7 m /25v c15* 0.015 m c7 r18* 47 m ?25v s6a r16* c1 1 s1 c5 s6b 4.7 m /25v 4.7 m /25v 4.7 m /25v 4.7 m /25v 2.2k 2.2k r13* 180 180 r17* c10 c9 c8 r14* 47 m /25v c4 c3 c2 c6 s6c s6d s2 s3 s4 0.1 m 0.1 m 0.1 m 0.1 m c14* 0.015 m s5b 2.7k r1 1* c12 4.7 m /25v v2 v3 v4 v5 4.5v 2.5v 2v 0v 3.5v 12k c21 c22 47 m /25v 47 m /25v r23* 300k s7a s1 1 r25* r27* 10k 5.1k 4.7 m /25v 4.7 m /25v 4.7 m /25v 4.7 m /25v c25 c27 c31 5.1k s10a 0.1 m c29 s8 r33* r29* r31* 330k 240k s12 s13 on off c32 4.7 m /25v r35 1k c34 0.1 m s10c r41* c36 s14 5.1k c37 4.7 m /25v r42 1k r37* r40* 330k 240k s16 rec pb c40 c42 0.1 m 0.018 m s20a r82 s41 100 100 r81 s42 r71 s31 10k r70 s32 10k r69 s33 10k r68 s21 10k r67 s34 10k r80 s58 100 r79 s43 100 r78 s44 100 r75 s59 100 r77 s45 100 r76 s46 100 r72 s49 100 r73 s48 100 r74 s47 100 r60 s40 10k r61 s39 10k r62 s38 10k r64 s37 10k 10k r63 s57 r65 s36 10k 10k r66 s35 c54 4.7 m /25v 10k r53* s24e c53 4.7 m /25v 10k r52* s24c c44 4.7 m /25v 5.1k r49* s10e 0.1 m c56 s22 *r59 100k 27k r45* 27k r44* c50 4.7 m /25v 1k r57 r47* 4.7 m /25v c47 2.7k 2.7k r48* c46 4.7 m /25v s24a s24b s25 norm high c45 4.7 m /25v 1k r56 c49 4.7 m /25v 1k r55 r55 c48 4.7 m /25v 1k r54 c43 4.7 m /25v 5.1k r46* s10f 0.1 m c55 s23 *r58 100k met al s26 cr02 s27 norm s28 s29 120 m s 70 m s s30 deck a deck b c52 4.7 m /25v 10k r51* s24d 4.7 m /25v c51 r50* 10k s24f c41 c39 0.1 m 0.018 m *s20b 4.7 m /25v c38 s56 s19 s18 s17 on off x1.7 gnd v6 ac 4.7 m /25v 4.7 m /25v c35 5.1k r39* s10d 0.1 m c33 s15 c30 5.1k r32* s10b 0.1 m c28 s9 18k r34* 1k r43 240k r38* 330k r36* 240k r30* 330k r28* 4.7 m /25v c26 10k r26* 2.2 m /25v c24 5.1k r24* s7b r22* 4.7k c23 0.47 m c20 4.7 m /25v 47 m /25v r21 100k c19 c18 0.1 m c17 0.1 m c16 100 m /25v r19* 1k s51 r83 50k s50 gnd gnd s52 r15* audio sg power supply vcc 5v dc ammeter dc v oltmeter amp "a"wtg din audio 1khz bpf ccir ac v oltmeter distortion analyzer oscillo -scope 0db or 30db a s54 s53 s55 pb outb2 pb fb12 pb fb22 pb out a2 pb out a1 pb outb1 pb ina2 pb fb21 pb fb1 1 pb inb2 d r out2 fp cal gp cal rec in2 rec in1 d r out1 rec out2 rec out1 deck ab a eq b eq speed pb inb1 pb ina1 vcc rfc ams out ams gain agc in1 agc out1 d recin1 d iref d pbin1 nrsw dl out1 d tc1 agc tc gnd iref vg agc in2 agc out2 d recin2 rec mute d pbin2 mode d l out2 d tc2 to each sw electrical characteristics test circuit
15 CXA1897Q 1. description of control mode (1) playback and recording equalizers 1) playback equalizer (120 s/70 s) 2) recording equalizer (normal, cro 2 , metal) 3) speed control 4) recording mute (29 pin) the muting function is achieved by varying the gain of the recording equalizer amplifier as with an electric volume, depending on the dc voltage level supplied to the rec mute pin. mute on/off and the agc on/off are interlocked. notes for executing the fader function the recording mute and the agc are interlocked and if the agc is turned off, the agc output level is increased. therefore, when the level of 3db or more is input to the agc to execute the fader function, the natural characteristics cannot be obtained. take care of setting the input level to the agc. 5) fp cal (21 pin) the standard setting resistance is 27k . however, fo (hz) is reduced by increasing and increased by reducing this resistance. 6) gp cal (22 pin) the standard setting resistance is 27k . however, the gain is increased by increasing or reduced by reducing this resistance. a eq (16 pin) b eq (17 pin) l h l m/h l 120 s 70 s a eq control complied with (a deck) (a deck) h b eq control complied with 120 s 70 s (b deck) (b deck) deck ab (15 pin) b eq (17 pin) l m h rec mode normal (type i) cro 2 (type ii) metal (type iv) recording mute mute on ?db attenuation mute off control voltage gnd vcl 0.5v 2.0v 3.5v vch vcc speed (20 pin) l h playback equalizer normal speed 1.7 times normal speed recording equalizer normal speed 1.7 times normal speed rec mute mute on mute off agc off on
16 CXA1897Q (2) dolby b noise reduction 1) dolby nr input mode 2) dolby nr on/off/ 1.7 mode (27 pin) l h input rec in (7, 30 pin) pb in (9, 28 pin) dolby nr encoding decoding nrsw (10 pin) l m h dolby nr on off 1.7
17 CXA1897Q 2. ams (1) ams output logic when the pins have been connected as shown on the left figure, low : approximately 0.3v (v ce (sat) voltage) high : vcc (v) (2) ams level setting with the reference output level (?5dbm) of the playback equalizer as 0db, consider at how many decibels the ams level is to be set. use formula 1 to determine external resistance r. ex. 1) to set the detection level at 20db lower than the reference (calculated on the assumption that 1ch=2ch) ?5dbm?0db=?5dbm=6.16mvpeak r=6.16 10 ? 10 6 6.2k in which case, external resistance r is 6.2k . ex. 2) to set the detection level at 30db lower than the reference, ?5dbm?0db=?5dbm=1.95mvpeak r=1.95 10 ? 10 6 2k in which case, external resistance r is 2k . (3) ams band setting by inserting a capacitor in series with the external resistor determined in (2), the direct current of the ams is cut off. the lower end of the ams band can be limited by adjusting the capacitor value because the cut-off frequency of the high-pass filter is determined by this external resistor and capacitor. detection status signal detected no signal detected ams out l h 1 3 36 vcc gnd ams out inside of ic { vpeak (pbout1)+vpeak (pbout2) } 2 5 ? 5 a r (external resistance) compare r= vpeak (pbout1)+vpeak (pbout2) 10 6 ? 1 2
18 CXA1897Q application circuit + + + gnd 2.7k 4.7 m /25v 10k 10k gnd + gnd gnd + 4.7 m /25v + + + + + + 24 23 22 21 20 19 18 17 16 15 14 9 1 1 12 13 8 7 6 5 4 3 2 1 31 30 29 28 27 26 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 25 + 10 + + + + bias osc 2.2 m /25v 22k 22k 5.6k 0.47 m gnd 2.2 m /25v 27k gnd gnd 27k 4.7 m /25v 10k gnd norm/high 2.2 m /25v 2.2 m /25v 820p 180p 10k 12mh 10k 12mh 820p 4.7 m /25v 10k 4.7 m /25v 10k gnd norm/cro2 /met al gnd 120 m s/70 m s gnd deck a /deck b 4.7 m /25v 10k gnd gnd 0.47 m 5.6k 22k 2.2 m /25v 2.2 m /25v 22k + gnd 0.1 m 4.7 m /25v 4.7 m /25v 10k to line out1 on/off/x1.67 gnd gnd gnd 10k 100p 18k + + mpx gnd agc in1 0.47 m 4.7k + gnd + 47 m /25v 100 m /25v v cc v cc ams out 4.7 m /25v 4.7 m /25v 2.2 m /25v 100k 1k 12mh 180p + gnd 2.7k 4.7 m /25v 10k 10k 0.015 m + 180 47 m /25v gnd deck a pb head + 180 47 m /25v 0.015 m gnd gnd + + + mpx + + + + gnd gnd gnd gnd gnd gnd gnd gnd gnd gnd gnd agc in2 to line out2 pb/rec 12mh 180p on/off 12k 47 m /25v 33 m /25v 1m 4.7 m /25v 4.7 m /25v 4.7 m /25v ?db 47 m /25v 10k 100p 10k 4.7 m /25v 4.7 m /25v 10k 4.7 m /25v 0.1 m ?db pb outb2 pb out a2 pb fb22 pb fb12 pb inb2 pb ina2 pb ina1 pb inb1 pb fb1 1 pb fb21 pb out a1 pb outb1 d r out2 rec in2 gp cal fp cal speed rec out2 rec out1 b eq a eq deck ab rec in1 d r out1 vcc rfc ams out ams gain agc in1 agc out1 d recin1 d iref d pbin1 nrsw d l out1 d tc1 gnd iref vg agc tc agc in2 agc out2 d recin2 rec mute d pbin2 mode d l out2 d tc2 CXA1897Q + 4.7 m /25v gnd rec pb 180p pb rec gnd deck b r/p head 150p 150p application circuits shown are typical examples illustrating the operation of the devices. sony cannot assume responsibility fo r any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same .
19 CXA1897Q examples of representative characteristics ?0 10 25 20 15 7 8 9 1 1 quiescent current vs. supply voltage icc-quiescent current (ma) v cc -supply voltage (v) ?0 agc output voltage characteristics output level (dbm) input level (dbm) ?0 0 ?0 ?0 ?0 ?0 0 agc on agc off 0.5 agc input level (dbm) 0.1 0.05 0.01 ?0 ?0 ?0 ?0 0 t otal harmonic distortion (%) agc total harmonic distortion ?0 ams no signal detection level frequency response ams input level (playback equalizer output level) (db) frequency (hz) ?0 ?0 0 20 100 1k 10k 2k 20k 50 200 500 5k 50k 10 + 4 3 to 8v 100k 2.2 m 4.7k 0.47 m ams out ams gain 1.0 output level (dbm) 0.1 ?0 ?0 ?0 ? t otal harmonic distortion (%) ?5 ?5 play back equalizer total harmonic distortion vcc=8v agc tc 47 m f/300k w f=1khz v cc =8v r l =2.7k w mode 120 m s-ns f=1khz v cc =8v 120 m s-ns ams out 7v 0db=?5dbm, 315hz (playback equalizer reference output level)
20 CXA1897Q 10 playback equalizer frequency response gain (db) 20 100 1k 10k 2k 20k 50 200 500 5k 50k 0.015 m 2.2k 4.7 m pb in pb fb1 20 30 40 50 60 + + 180 + m pb fb2 pb out 120 m s-ns 120 m s-hs 70 m s-ns 70 m s-hs recording equalizer frequency response output response (db) frequency (hz) 20 100 1k 10k 2k 20k 50 200 500 5k 50k 100k 2 4 6 8 10 12 14 16 18 20 22 24 26 0 ? ? b type encode characteristics encode boost (db) frequency (hz) 20 100 1k 10k 2k 20k 50 200 500 5k 2 4 6 8 10 0 ?0db ?0db ?0db ?0db 0db frequency (hz) 47 m 4.7 m v cc =8v 0db=dolby level =?0dbm norm-norm cro 2 -norm met al-norm norm-high cro 2 -high met al-high v cc =8v 0db=norm-norm, 315hz, ?0dbm (t ape) (speed)
21 CXA1897Q 1.0 output level (db) 0.1 ?0 0 t otal harmonic distortion (%) recording equalizer total harmonic distortion 10 ?0 0.0 output level vs. mute voltage output level (db) rec mute pin voltage (v) ?0 ?0 ?0 ?0 ?0 ?0 ?0 ?0 0 1.0 2.0 3.0 4.0 5.0 6.0 v cc =8v mode : norm-norm (t ape) (speed) 0db=1khz, +8db f=1khz 1.0 output level (db) 0.01 ?0 0 t otal harmonic distortion (%) nr of f total harmonic distortion 10 0.1 ? 5 15 1.0 output level (db) 0.01 ?0 0 t otal harmonic distortion (%) b type total harmonic distortion 10 0.1 ? 5 15 ? 5 15 v cc =8v 0db=?0dbm r l =2.7k w mode : norm-norm (t ape) (speed) 100hz 1khz 10khz v cc =8v encode mode, r l =10k w 0db=dolby level 100hz 1khz 10khz v cc =8v encode mode, r l =10k w 0db=dolby level 100hz 1khz 10khz
s o n y c o d e e i a j c o d e j e d e c c o d e m p a c k a g e s t r u c t u r e p a c k a g e m a t e r i a l l e a d t r e a t m e n t l e a d m a t e r i a l p a c k a g e m a s s e p o x y r e s i n s o l d e r / p a l l a d i u m p l a t i n g 4 2 / c o p p e r a l l o y 4 8 p i n q f p ( p l a s t i c ) 1 5 . 3 0 . 4 1 2 . 0 0 . 1 + 0 . 4 0 . 8 0 . 3 0 . 1 + 0 . 1 5 0 . 2 4 1 3 2 4 2 5 3 6 3 7 4 8 1 1 2 2 . 2 0 . 1 5 + 0 . 3 5 0 . 9 0 . 2 0 . 1 0 . 1 + 0 . 2 1 3 . 5 0 . 1 5 0 . 0 5 + 0 . 1 q f p - 4 8 p - l 0 4 q f p 0 4 8 - p - 1 2 1 2 0 . 7 g 0 . 1 5 package outline unit : mm CXA1897Q 22 n o t e : p a l l a d i u m p l a t i n g t h i s p r o d u c t u s e s s - p d p p f ( s o n y s p e c . - p a l l a d i u m p r e - p l a t e d l e a d f r a m e ) .

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