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? e93z04-te absolute maximum ratings (ta=25?) supply voltage v cc 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 v cc 6.5 to 11 v description the CXA1910Q is an ic designed for use in car stereos. functions include dolby b type noise reduction, playback equalizer amplifier and music sensor into a single chip. features few external parts forward/reverse head switching 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 (cxa1911) music sense level can be set by external resistors/capacitors (2 modes). high-band cut filter frequency can be adjusted by the external capacitance. 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) CXA1910Q * 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. * 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.
? CXA1910Q block diagram and pin configuration nc tapesw drsw nrmode mssw msmode g1 (ff) g2 (nor) mstc msout msgnd tc2 nc2 lineout2 d iref mslpf nc tapein2 vcc pbout2 nrsw tc1 nc1 lineout1 vct nc nc tapein1 gnd pbout1 pbtc1 pbfb1 pbrin1 pbfin1 pbgnd e iref pbfin2 pbrin2 pbfb2 pbtc2 300k 300k 10db de t ms mode nr dr ta pe in g1/g2 lp f nr off nr on nr on nr off f/r f/r aux 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 22 21 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 nr nr
? CXA1910Q pin description (ta=25?, v cc =8.0v, no signal) pin symbol dc z (in) equivalent circuit description no. value 1 pbout 2.1v 30 32 pbfb 2.1v 300k 39 33 pbin 0v 34 37 38 2v cc 8.0v 10 msgnd 0.0v 29 gnd 35 pbgnd 31 pbtc 40 36 e iref 1.25v 11 msout 0.0v for signal detection; 5.0v for no signal detection pbeq output pbeq feedback pbeq input power supply ground pbeq capacitance reference current setting resistor pin ms output 147 42 30 vcc gnd 31 40 147 10 1.25v vcc gnd 36 147 vcc gnd 20k v dd =5v 11 refer to page 6.
? CXA1910Q pin symbol dc z (in) equivalent circuit description no. value 12 mstc approx. 1.4v for signal detection; 5.0v for no signal detection 13 g2(nor) 4.0v 14 g1(ff) 3 tapein 4.0v 40k 28 6 d iref 1.25v 7 lineout 4.0v 24 connection of ms detection time constant ms feedback tape input connection of reference current setting resistor for dolby block line output 147 vcc gnd 1k 50 v dd =5v 12 100k 147 vcc gnd 100 10 14 13 147 vcc gnd 40k 15 to vgs 28 3 147 50 1.25v vcc gnd 8k 6 147 vcc gnd 200 200 7 24
? CXA1910Q pin symbol dc z (in) equivalent circuit description no. value 9 tc 0.3v 22 15 msmode 17 nrmode 18 drsw 19 tapesw 21 nrsw 16 mssw 25 vct 4.0v 4nc 8 20 23 26 27 5 mslpf 4.0v 100k time constant pin for the level detector refer to page 6. refer to page 6. v cc /2 output no connection. capacitance connection for adjusting the ms lpf time constant. vcc gnd 20k 6 600k 22 9 0.5 0.5 147 2 147 vcc gnd 50 21 19 18 17 15 147 vcc gnd 50 50 16 147 vcc gnd to vgs 45k 30k 30k 50 25 147 v cc gnd 100 k 5 64p
? CXA1910Q * pbout, pbfb, pbin equivalent circuit * description for sw pins msmode - switching of ms signal detection/blank detection high: g1; low: g2 nrsw - switching of dolby b type noise reduction on/off high: noise reduction on; low: noise reduction off drsw - switching of tape direction high: reverse; low: forward tapesw - switching of high/normal tape high: normal tape; low: high tape nrmode - switching of noise reduction modes high: noise reduction off; low: dolby b mssw - switching of ms on/off high: ms on; low: ms off pbout pbfb pbin 147 600 500 vcc v reg gnd 500 10p 300k 30 32 33 34 37 38 1 39
? CXA1910Q 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. i cc v tin bp1 bp2 bp3 bp4 bp5 thd1 thd2 sn1 v omax 1 ct3 v os 1 pbref f120f f70f f120r v omax 2 thd5 sn2 v os 2 ct4 ct5 vms1 vms2 i oh v ol i crg v crg1 v crg2 v il v ih no signal lineout= 0 db 1khz tape in 500hz nr-on vlo=?5db tape in 2khz nr-on vlo=?5db tape in 5khz nr-on vlo=?5db tape in 10khz nr-on vlo=?0db tape in 10khz nr-on vlo=0db tape in ?0dbm 1khz rl=2.7k tape in ?0dbm 1khz nr-on rl=2.7k no signal nr-on ccir/arm filter 1khz thd=1% rl=2.7k tape in ?4dbm 1khz no signal pb f in 315hz ?0dbm vpbo=0db pb f in 2.7khz ?8.5dbm for 315hz pb f in 4.5khz ?3.8dbm for 315hz pb r in 315hz ?0dbm for 315hz pb f in 1khz thd=1% rl=2.7k pb f in 1khz ?2dbm rl=2.7k no signal "a" weighting filter no signal rg=2.2k pb in 1khz ?2dbm tape in 5khz ms-on g1 (10k , 0.015?) tape in 5khz ms-on g2 (1k , 1.5?) tape in 5khz -30dbm, 1ma applied to msout ams on (g1 mode) no signal, 3.4v applied to vct and 1.8v to pbfb no signal, vct level when boost charge on no signal, vct level when boost charge off msmode, nrmode, mssw, tapesw, nrsw, drsw 14.5 17.9 21.5 ma ?2.0 ?0.0 ?8.0 dbm 1.4 2.9 4.4 5.5 6.4 8.5 3.9 5.2 6.9 db 9.7 10.4 11.9 ?.1 0.4 1.9 0.03 0.2 % 0.04 0.2 77.0 82.8 db 13.0 14.4 db ?7 ?5 3.9 4.0 4.1 v ?7.0 ?5.0 ?3.0 dbm ?.5 0.7 1.5 ?.5 0.0 1.5 db ?.0 0.0 1.0 ?0.0 ?.0 dbm 0.07 0.5 % 57.0 60.0 db 1.55 1.95 2.35 v ?8 ?0 db ?5 ?5 ?3.0 ?9.0 ?5.0 dbm ?2.5 ?8.5 ?4.5 0.0 1.0 ? 0.28 1.0 v 1.0 3.0 ma 3.4 3.6 v 0.0 0.8 2.5 vcc current consumption tape in input sensitivity decode boost 1 decode boost 2 decode boost 3 decode boost 4 decode boost 5 tape in total harmonic distortion 1 tape in total harmonic distortion 2 decode s/n ratio signal handling cross talk tape 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 pbfb boost-charge current boost charge on vct level boost charge off vct level 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 boost charge circuit block
? CXA1910Q nc tapesw drsw namode mssw msmode g1(ff) g2(nor) mstc msout nrsw tc1 nc1 lineout1 vct nc nc tapein1 gnd pbout1 pbtc1 pbfb1 pbrin1 pbfin1 pbgnd e iref pbfin2 pbrin2 pbfb2 pbtc2 CXA1910Q c24 r22 s6 2.7k r11 2.7k r14 c7 audio sg vcc dc ammeter r35 s16 10k din audio "a" wtg off : 0db on : 30db 0db or 30db dc voltmeter r34 r32 100 10k 100 s17 s18 s19 gnd gnd s7 270 r13 33m c13 msgnd nc2 lineout2 d iref mslpf nc tapein2 vcc pbout2 tc2 31 32 35 36 38 39 40 33 34 37 ccir 1khz bpf amp r26 50k s26 oscillo -scope distortion analyzer ac voltmeter 100 r29 s22 10 k r28 s23 10 k r27 s24 r26 s25 100 20 19 18 17 16 14 11 13 12 15 s13 2.7k 10n 23 21 25 24 30 29 28 22 26 27 8 6 4 3 2 1 5 9 10 7 r33 v5 v4 v3 v2 v1 v7 0.1 + + + + c22 0.1 c20 2.2 c18 10 r17 5.1k r19 138.5k c13 1 c10 1 s7 + + + + + + + + + + + + + r24 r23 10k 1k c27 c26 0.015 1.5 c25 0.1 r25 1meg r31 10k r30 100 s20 s21 r45 100k s15 c23 0.1 r21 2.7k s14 c19 2.2 r20 10k s44 c16 0.1 c12 1 s8 r16 5.1k r18 138.5k c11 10 c9 10 15k r15 r8 2.2k c4 4.7 c3 4.7 r7 2.2k s3 s4 c1 33 r12 270 c7 10n r10 2.2k s1 s2 r9 2.2k c8 c5 4.7 4.7 power supply gnd a r3 r4 r5 r6 19.2k 19.2k 19.2k 19.2k gnd r1 r2 1.2k 1.2k s28 s29 s30 s31 s32 electrical characteristics measurement circuit
? CXA1910Q nc tapesw drsw nrmode mssw msmode g1 g2 mstc msout msgnd tc2 lineout2 d iref mslpf nc tapein2 vcc pbout2 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 h : off, l : dolby b h : mson, l : msoff h : rvs, l : fwd h : nr on, l: nr off v dd to microcomputer 0.1 c15 c13 2.2 c12 10 c6 0.22 nrsw tc1 lineout1 vct nc nc tapein1 gnd pbout1 nc1 1k r4 r3 1k c2 16 c4 10n c1 16 c3 10n r5 15k c7 0.22 8v c5 10 c20 r6 18k c14 2.2 c16 0.1 nc2 pb head h : 120s, l : 70s mssw 150p 300k 300k nr off nr on 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 nr off nr on nr nr 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 and other right due to same.
?0 CXA1910Q nc tapesw drsw nrmode mssw msmode g1 g2 mstc msout msgnd tch2 lineout2 d iref mslpf nc tapein2 vcc pbout2 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 h : off, l : dolby b h : mson, l : msoff h : rvs, l : fwd h : nr on, l: nr off v dd to microcomputer 0.1 c15 2.2 c12 10 c6 0.22 nrsw tch1 lineout1 vct nc nc tapein1 gnd pbout1 tcl1 1k r4 r3 1k c2 16 c4 10n c1 16 c3 10n r5 15k c7 0.22 8v c5 10 c20 r6 20k c14 2.2 c16 0.1 tcl2 pb head h : 120s, l : 70s mssw 150p c13 300k 300k nr off nr on 10db lpf det ms mode nr dr 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 nr off nr on nr nr c20 68n 68n c21 tape 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 and other right due to same.
?1 CXA1910Q operation mode control (insw, auxsw, tapesw, drsw, nrsw, mssw, modesw) the CXA1910Q 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 nrsw nr off nr on tapesw 70? 120? drsw pb fwd pb rvs nrmode dolby b nr off mssw ms off ms on msmode g2 (nor) mode g1 (ff) mode
?2 CXA1910Q description of operation (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 24db. reference input level for dolby is ?0dbm. the adjustment method of playback equalizer is described in the paragraph (3). (2) level diagram fig. 2 op2 4db 20db 20db nr off nr on op1 pbfb pbtc pbout dolby level (?dbm) lineout pbin f r nr (?0dbm) tapein ?0 ?5 ?0 ?5 ?0 ?5 ?0 ?5 ?0 ?5 ?0 ?5 ?0 ?5 p b i n vr adjustment 30dbm 6dbm dolby level 70dbm (315hz 160n/w b/m) ? p b o u t t a p e i n l i n e o u t 30dbm 0dbm
?3 CXA1910Q (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. g3 are obtained by the following equations. r1+300k g1=10+20log (db) r1 [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 pbtc pbout 300k e iref r4 1 g1 g2 g3 pbin fr ri 3 2 1 fc fig. 4
?4 CXA1910Q (4) ms (internal detection between tracks) adjustment method fig. 5 1) ms gain (ff/nor mode gain) adjustment ? external resistors r1 and r2 ms gain is expressed by the following equations. g1 = 10 + 20log r1 + 100k [db] g2 = 10 + 20log r2 + 100k [db] r1 r2 2) ms low-band cut-off frequency adjustment ? external resistors r1 and r2 and external capacitors c1 and c2 the external resistors r1 and r2 and external capacitors c1 and c2 should be adjusted to adjust the low- band cut-off frequency for the ms frequency response. 3) ms high-band cut-off frequency adjustment ? external capacitor c3 the external capacitor c3 should be adjusted to adjust the high-band cut-off frequency for the ms frequency response. (in this case, g1 and g2 have the same cut-off frequency.) det g2 g1 msout tapein 10db 25khz lpf (in the case of built-in cr only) 100k w g1 g2 r1 r2 c1 c2 2 1 mstc 2 1 2 1 2 1 100k w 64pf 3 3 mslpf c3
?5 CXA1910Q out 300k 0.01 33 270 supply voltage [v] 7.0 8.0 9.0 10.0 11.0 12.0 16.5 17.0 17.5 current consumption [ma] c urre nt co nsump tio n vs. sup p ly vo ltag e 50 100 1k 18.0 playb ack equalizer frequency resp onse gain [db] frequency [hz] 60 50 40 30 v cc =8.0v nr off, ms off output level 25dbm constant 120 s 70 s ta=25c 10 8 6 4 2 0 1k 100 10k v cc =8.0v 0db=dolby level decode b oost frequency resp onse decode boost [db] frequency [hz] ?0db ?0db ta=25c ta=25c 6.0 5.0 13.0 for no signal nr off, ms off 0db 10k ?0db ?0db characteristics graphs
?6 CXA1910Q total harmonic distortion (p re-amp lifier b lock) total harmonic distortion [%] output level [dbm] btyp e total harmonic distortion (dolb y b lock) r ip p le rejection ratio (pb o u t) frequency [hz] r ip p le rejection ratio (lin eo u t) ripple elimination ratio [db] frequency [hz] ta=25c 10 -2 10 0 10 -1 ? ? 0 4 8 12 14 ?4 ?0 ?6 ?2 ? ? 0 10 0 10 1 10 -1 ta=25c f=10khz f=1khz f=100hz nr off f=1khz nr b f=100khz nr b f=1khz nr b f=10khz 1k 100 10k ?0 ?0 ?0 ?0 ?0 ?0 ta=25c 50 500 5k ?0 ?0 ?0 ?0 ?0 ?0 ?0 ta=25c 1k 100 10k 500 5k nr off nr b total harmonic distortion [%] output level [db] ripple elimination ratio [db] v cc =8.0v input : pbfin1 output : pbout1 r l =2.7k w input : t apein1 output : lineout1 v cc =8.0v 0db=dolby level rl=2.7k w v cc =8.0v r l =2.7k w v cc =8.0v r l =2.7k w
?7 CXA1910Q ?0 ?0 ?0 ?0 ?0 10 20 30 40 50 60 ms b lock gain vs. blank detection level input level [dbm] v cc =8.0v input : t apein1 f=1khz ta=25c 0 ?0 ?0 ?0 ?0 ?0 ?0 20 100 1k 10k blank detection level frequency resp onse frequency [hz] ta = 25c hpf gain 20 db hpf gain 40 db input level [dbm] vcc = 8.0 v input : t apein 1 mslpf pin : 120 pf cross talk [db] frequency [hz] ?0 1k 100 5k ?0 ?0 ?0 ?0 ta=25c v cc =8.0v input : pbfin1 output : lineout2 (lineout1 level constant) nr off 500 10k hpf gain [db] c ro ss talk b e twe e n channe ls (1ch ? 2ch)
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 CXA1910Q ?8

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