CXA1910Q

CXA1910Q Dolby B Type Noise Reduction System with Playback Equalizer For the availability of this product, please contact the sales office. 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 40 pin QFP (Plastic) Absolute Maximum Ratings (Ta=25°C) • Supply voltage VCC 12 V • Operating temperature Topr –40 to +85 °C • Storage temperature Tstg –65 to +150 °C • Allowable power dissipation PD 430 mW Recommended Operating Condition Supply voltage VCC 6.5 to 11 V ∗ 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. —1— E93Z04-TE CXA1910Q Block Diagram and Pin Configuration TAPEIN1 LINEOUT1 PBOUT1 GND VCT 30 29 28 27 26 25 24 23 TC1 22 NC NRSW 21 NC NC1 NC PBTC1 32 31 20 PBFB1 PBRIN1 PBFIN1 PBGND E IREF 37 36 34 33 NR 300k F/R 19 18 NR OFF NR ON TAPESW DRSW NRMODE 17 IN A UX TA PE DR NR MSSW 16 35 MSMODE MS MODE 15 G1 (FF) PBFIN2 38 F/R 10dB 300k LPF G1/G2 13 14 G2 (NOR) MSTC MSOUT 11 PBRIN2 PBFB2 NR OFF 39 NR ON PBTC2 40 1 2 3 4 5 6 7 8 9 10 LINEOUT2 TAPEIN2 PBOUT2 MSLPF D IREF NC2 TC2 Vcc —2— MSGND NC 12 NR DET CXA1910Q Pin Description Pin No. 1 30 32 39 33 34 37 38 2 10 29 35 31 40 Symbol PBOUT PBFB PBIN DC value 2.1V 2.1V 0V Z (in) — 300kΩ — Equivalent circuit Refer to Page 6. (Ta=25°C, VCC=8.0V, no signal) Description PBEQ output PBEQ feedback PBEQ input VCC MSGND GND PBGND PBTC 8.0V 0.0V — — Power supply Ground — — Vcc PBEQ capacitance 147 31 40 42µ 30µ GND 36 E IREF 1.25V — Vcc Reference current setting resistor pin 147 36 10µ 1.25V GND 11 MSOUT 0.0V for signal detection; 5.0V for no signal detection — VDD=5V Vcc MS output 147 11 20k GND —3— CXA1910Q Pin No. 12 Symbol MSTC DC value Approx. 1.4V for signal detection; 5.0V for no signal detection Z (in) — VDD=5V Equivalent circuit Description Connection of MS detection time constant Vcc 147 12 1k 50µ GND 13 14 G2(NOR) G1(FF) 4.0V — 10µ Vcc MS feedback 147 13 14 100k 100µ GND 3 28 TAPEIN 4.0V 40k Vcc 15µ TAPE input 3 28 147 40k to VGS GND Vcc 6 D IREF 1.25V — Connection of reference current setting resistor for Dolby block 147 8k 6 1.25V 50µ GND 7 24 LINEOUT 4.0V — Vcc Line output 7 24 147 200 200 GND —4— CXA1910Q Pin No. 9 22 Symbol TC DC value 0.3V Z (in) — Equivalent circuit Vcc ×2 0.5µ 20k 6µ 0.5µ Description Time Constant pin for the level detector 9 147 22 600k GND 15 17 18 19 21 MSMODE NRMODE DRSW TAPESW NRSW — — 15 17 147 18 19 21 Vcc 50µ Refer to Page 6. GND 16 MSSW — — 50µ 147 16 Vcc 50µ Refer to Page 6. GND 25 VCT 4.0V — 30k Vcc 50µ 45k 25 147 to VGS 30k GND VCC/2 output 4 8 20 23 26 27 5 NC — — No connection. MSLPF 4.0V 100k 100 k VCC Capacitance connection for adjusting the MS LPF time constant. 5 147 64p GND —5— CXA1910Q * PBOUT, PBFB, PBIN equivalent circuit Vcc VREG PBOUT 147 500 1 30 PBFB 32 39 500 300k 10p PBIN 33 34 37 38 600 GND ∗ 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 —6— CXA1910Q Electrical Characteristics (Ta=25°C, Vcc=8.0V, RL: output load resistance, Rg: head equivalent impedance) Item Current consumption Symbol ICC No signal Measurement conditions∗ (input pin, input level, frequency etc.) 14.5 17.9 21.5 mA Min. Typ. Max. Unit Dolby block (Dolby level -6dBm=0dB) 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 VTIN BP1 BP2 BP3 BP4 BP5 THD1 THD2 SN1 VOMAX1 CT3 VOS1 LINEOUT= 0 dB 1kHz TAPE IN 500Hz NR-ON Vlo=–25dB TAPE IN 2kHz NR-ON Vlo=–25dB TAPE IN 5kHz NR-ON Vlo=–25dB TAPE IN 10kHz NR-ON Vlo=–40dB TAPE IN 10kHz NR-ON Vlo=0dB TAPE IN –20dBm 1kHz RL=2.7kΩ TAPE IN –20dBm 1kHz NR-ON RL=2.7kΩ No signal NR-ON CCIR/ARM filter 1kHz THD=1% RL=2.7kΩ TAPE IN –24dBm 1kHz No signal –32.0 1.4 5.5 3.9 9.7 –1.1 — — 77.0 13.0 — 3.9 –30.0 2.9 6.4 5.2 10.4 0.4 0.03 0.04 82.8 14.4 –67 4.0 –28.0 4.4 8.5 6.9 11.9 1.9 0.2 % 0.2 — — dB –55 4.1 V dB dB dBm Playback equalizer amplifier block 120µs FWD frequency characteristics 120µs FWD frequency characteristics 70µs FWD frequency characteristics 120µs RVS frequency characteristics Signal handling Total harmonic distortion S/N ratio Output offset voltage Cross talk between channels Cross talk between RVS and FWD PBREF F120F F70F F120R VOMAX2 THD5 SN2 VOS2 CT4 CT5 PB F IN 315Hz –70dBm VPBO=0dB PB F IN 2.7kHz –58.5dBm for 315Hz PB F IN 4.5kHz –53.8dBm for 315Hz PB R IN 315Hz –70dBm for 315Hz PB F IN 1kHz THD=1% RL=2.7kΩ PB F IN 1kHz –52dBm RL=2.7kΩ No signal "A" weighting filter No signal Rg=2.2kΩ PB IN 1kHz –42dBm –27.0 –1.5 –1.5 –1.0 –10.0 — 57.0 1.55 — — –25.0 0.7 0.0 0.0 –3.0 0.07 60.0 1.95 –78 –75 –23.0 1.5 1.5 1.0 — 0.5 — 2.35 –70 dB –65 dBm % dB V dB dBm Interval detection between tracks (MUSIC SENSOR) block Signal detection level 1 Signal detection level 2 MS output leak current MS output saturation voltage VMS1 VMS2 IOH TAPE IN 5kHz -30dBm, 1mA applied to MSOUT VOL AMS ON (G1 mode) — 0.28 1.0 V TAPE IN 5kHz MS-ON G1 (10kΩ, 0.015µF) TAPE IN 5kHz MS-ON G2 (1kΩ, 1.5µF) –43.0 –62.5 — –39.0 –58.5 0.0 –35.0 dBm –54.5 1.0 µA Boost charge circuit block PBFB boost-charge current Boost charge ON VCT level Boost charge OFF VCT level Logic voltage VIH TAPESW, NRSW, DRSW 2.5 — Vcc ICRG VCRG1 VCRG2 VIL 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, 1.0 — 3.6 0.0 3.0 — — — — 3.4 — V 0.8 mA ∗120µs, FWD mode, NR OFF, MS OFF unless otherwise specified. —7— Electrical Characteristics Measurement Circuit R35 10K R34 100 R33 10K R32 100 R19 138.5k S19 S18 S17 S16 DC Voltmeter 0dB or 30dB Amp R17 5.1k S13 S7 R26 50k 2.7k S26 1µ 1µ C13 C10 R14 2.7k C22 0.1µ + V5 + GND C18 + 10µ C20 + 2.2µ R22 C24 0.1µ S7 OFF : 0dB ON : 30dB GND 30 27 NC NC VCT NC1 TC1 NRSW NC 29 28 26 21 25 24 GND 23 22 R13 S28 C7 Audio SG 10n + 31 R1 PBOUT1 1.2k R2 1.2k 33m 270 C13 TAPEIN1 LINEOUT1 PBTC1 20 S29 V4 R10 + 32 33 18 R6 S1 2.2k 4.7µ C5 C8 PBFB1 PBRIN1 DRSW V3 V2 TAPESW GND + 34 17 Power Supply S2 R9 4.7µ 19.2k R5 19 "A" WTG 19.2k 35 16 Vcc 2.2k R15 PBFIN1 NAMODE PBGND S30 DIN Audio V1 36 CXA1910Q MSSW R8 15k C4 + 15 37 4.7µ + 14 38 19.2k 4.7µ R7 13 39 12 C7 10n C25 40 R12 C1 270 33µ 11 1MEG + 0.1µ R25 MSLPF D IREF LINEOUT2 PBOUT2 Vcc TAPEIN2 NC NC2 TC2 MSGND R45 R11 2.7k 1 10 S44 10µ C9 C12 1µ R20 10k S6 10µ S8 0.1µ R21 2.7k C23 C16 + C19 2.2µ + + + 2 3 4 5 6 7 8 9 DC Ammeter A C11 0.1µ S15 100k R16 R18 5.1k 138.5k S14 + —8— S3 2.2k R24 + 10k R23 + 1k 1.5µ 0.015µ C26 C27 C3 GND S4 R4 E IREF MSMODE G1(FF) G2(NOR) MSTC PBFIN2 PBRIN2 PBFB2 PBTC2 MSOUT V7 S31 1kHz BPF 19.2k R3 2.2k R31 S20 S32 10k R30 S21 100 CCIR AC Voltmeter Distortion Analyzer R29 10 k R28 10 k R27 100 R26 100 S22 S23 S24 S25 Oscillo -scope CXA1910Q Application Circuit 2.2µ C15 0.22µ 0.1µ C6 C12 10µ GND TAPEIN1 NC LINEOUT1 C13 PBOUT1 NC VCT NC1 TC1 NRSW H : NR ON, L: NR OFF TO MICROCOMPUTER NC 20 30 29 28 27 26 25 24 23 22 21 C2 PB HEAD TAPESW 19 32 300k 1k 10n PBFB1 NR 18 33 PBTC1 TAPE/AUX NR OFF NR ON H : 120µs, L : 70µs DRSW H : RVS, L : FWD NRMODE H : OFF, L : DOLBY B MSSW H : MSON, L : MSOFF MSMODE G1 G2 G1/G2 G1/G2 DET DET 13 REV1 PBRIN1 PBFIN1 35 34 17 16µ 31 R4 C4 RADIO/CD VDD 300k 300k AUX AUX 16 15 IN IN FWD1 TAPE TAPE PBGND 36 MSSW DR DR MS R5 E IREF PBFIN2 PBRIN2 NR NR OFF NR ON TAPE/AUX RADIO/CD 39 38 37 300k 300k 10dB 10dB LPF 14 C1 C17 0.1µ 40 10n MSOUT 7 8 9 10 R8 R7 NC2 TC2 1k 1 2 3 4 5 6 PBTC2 11 1MEG C16 0.1µ MSGND R3 C3 16µ PBFB2 300k 12 Vcc PBOUT2 8V C5 10µ TAPEIN2 NC C20 C7 0.22µ CXA1910Q 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. 150P MSLPF R6 D IREF 18k C14 LINEOUT2 2.2µ 100k —9— MS MODE MODE NR NR 15k FWD2 R10 (H : G1, L : G2) C19 10k 0.015µ C18 R9 MSTC 1k 1.5µ L : SIGNAL EXIST H : NO SIGNAL LPF RVS2 Application Circuit 2.2µ C20 68n C15 0.1µ C6 0.22µ C12 10µ PBOUT1 NC VCT TCL1 GND TAPEIN1 NC LINEOUT1 C13 TCH1 NRSW H : NR ON, L: NR OFF TO MICROCOMPUTER NC 20 30 29 28 27 26 25 24 23 22 21 C2 PB HEAD 32 1k 10n PBTC1 31 R4 TAPE/AUX NR OFF NR ON 19 C4 RADIO/CD TAPESW H : 120µs, L : 70µs DRSW H : RVS, L : FWD NRMODE H : OFF, L : DOLBY B VDD PBRIN1 PBFIN1 PBGND MSSW 36 35 16 34 33 300k 300k AUX AUX TAPE TAPE DR DR 17 18 REV1 IN IN FWD1 16µ PBFB1 NR R5 E IREF PBFIN2 38 37 14 300k RVS2 NR DET DET NR OFF NR ON TAPE/AUX RADIO/CD 39 PBRIN2 PBFB2 40 G1/G2 G1/G2 13 C1 C17 0.1µ R8 MSOUT 1k 1 2 3 4 5 6 7 C3 PBTC2 10n 11 R7 8 9 10 1MEG TCH2 C16 0.1µ MSGND R3 16µ 300k 12 Vcc NC PBOUT2 8V C5 10µ TAPEIN2 C20 150P MSLPF R6 C7 0.22µ CXA1910Q 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. D IREF 20k C14 LINEOUT2 2.2µ C21 68n TCL2 100k —10— MS MODE MODE 15 MS 15k NR NR 300k 300k 10dB LPF FWD2 MSSW H : MSON, L : MSOFF MSMODE (H : G1, L : G2) R10 C19 G1 G2 R9 MSTC L : SIGNAL EXIST H : NO SIGNAL 10k 0.015µ C18 1k 1.5µ 10dB LPF 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. SW NRSW TAPESW DRSW NRMODE MSSW MSMODE Function for Low input NR OFF 70µs PB FWD DOLBY B MS OFF G2 (NOR) MODE Function for High input NR ON 120µs PB RVS NR OFF MS ON G1 (FF) MODE Click noise can be reduced by the external CR time constant circuit for NR SW switching. —11— CXA1910Q Description of Operation (1) Signal route (–30dBm) TAPEIN Dolby level (–6dBm) LINEOUT PBFB PBTC PBOUT Op1 Op2 4dB NR 20dB NR ON NR OFF 20dB PBIN F R 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 –30dBm. The adjustment method of playback equalizer is described in the paragraph (3). (2) Level diagram P B I N P B O U T T A P E I N L I N E O U T 0dBm –5 –10 –15 –20 –25 –30 –35 –40 –45 –50 –55 –60 –65 –70 –75 –6dBm Dolby level –30dBm VR adjustment –30dBm –70dBm (315Hz 160n/Wb/m) Fig. 2 —12— CXA1910Q (3) Adjustment of playback equalizer R1 C1 C2 3 PBFB PBTC Ri PBOUT G1 1 300k G2 G3 2 fc Fig. 4 PBIN R E IREF F 1 R4 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. G1=10+20log R1+300k R1 (dB) [AC gain can be also adjusted by attaching VR to PBOUT pin, fixing R1. However, the low-band cutoff 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. —13— CXA1910Q (4) MS (internal detection between tracks) adjustment method 2 G1 G2 3 1 1 2 MSTC 25kHz LPF (in the case of built-in CR only) TAPEIN 10dB 100kΩ 64pF 100kΩ DET MSOUT MSLPF G1 G2 3 C3 2 1 R1 C1 1 R2 C2 2 Fig. 5 1) MS gain (FF/NOR mode gain) adjustment → External resistors R1 and R2 MS gain is expressed by the following equations. R1 + 100k [dB] R1 R2 + 100k [dB] R2 G1 = 10 + 20log G2 = 10 + 20log 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 lowband 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.) —14— CXA1910Q Characteristics Graphs Current consump tion vs. Sup p ly voltage 18.0 For no signal NR OFF, MS OFF 60 Ta=25°C VCC=8.0V NR OFF, MS OFF Output level 25dBm constant Playb ack equalizer frequency resp onse Ta=25°C Gain [dB] Current consumption [mA] 50 17.5 40 120µs 30 70µs 17.0 50 100 1k Frequency [Hz] 10k 16.5 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 OUT 300k 0.01µ 33µ 270 Supply voltage [V] Decode b oost frequency resp onse Ta=25°C VCC=8.0V 0dB=Dolby Level –40dB 10 8 Decode boost [dB] –30dB 6 4 –20dB 2 –10dB 0dB 100 1k Frequency [Hz] 10k 0 —15— CXA1910Q Total harmonic distortion (p re-amp lifier b lock) 101 VCC=8.0V Input : PBFIN1 Output : PBOUT1 RL=2.7k Ω f=10kHz Ta=25°C B typ e total harmonic distortion (Dolb y b lock) 100 Input : TAPEIN1 Output : LINEOUT1 VCC=8.0V 0dB=Dolby Level RL=2.7k Ω Ta=25°C Total harmonic distortion [%] Total harmonic distortion [%] 100 f=1kHz 10-2 NR OFF f=1kHz NR B f=100kHz 10-1 f=100Hz 10-1 NR B f=1kHz NR B f=10kHz 0 4 8 12 14 –8 –24 –20 –16 –12 –8 –4 0 Output level [dBm] –4 Output level [dB] Rip p le rejection ratio (PB O UT) –10 Ta=25°C Ripple elimination ratio [dB] –20 VCC=8.0V RL=2.7k Ω –30 –40 –50 –60 50 100 1k 500 Frequency [Hz] 5k 10k Rip p le rejection ratio (LINEO UT) Ta=25°C –10 VCC=8.0V RL=2.7k Ω NR OFF –30 NR B –40 –20 Ripple elimination ratio [dB] –50 –60 –70 100 500 1k Frequency [Hz] 5k 10k —16— CXA1910Q Cross talk b etween channels (1ch → 2ch) Ta=25°C –30 VCC=8.0V Input : PBFIN1 Output : LINEOUT2 (LINEOUT1 level constant) NR OFF –40 Cross talk [dB] –50 –60 –70 100 1k 500 Frequency [Hz] 5k 10k B lank detection level frequency resp onse 0 Ta = 25°C Vcc = 8.0 V Input : TAPEIN 1 MSLPF Pin : 120 pF –10 –20 Input level [dBm] –30 HPF Gain 20 dB –40 –50 HPF Gain 40 dB –60 20 100 1k Frequency [HZ] 10k MS b lock gain vs. B lank detection level Ta=25°C –30 VCC=8.0V Input : TAPEIN1 f=1kHz –40 Input level [dBm] –50 –60 –70 10 20 30 40 50 60 HPF gain [dB] —17— CXA1910Q Package Outline Unit : mm 40PIN QFP (PLASTIC) 9.0 ± 0.4 + 0.4 7.0 – 0.1 30 21 + 0.35 1.5 – 0.15 + 0.1 0.127 – 0.05 0.1 31 20 A 40 11 1 0.65 + 0.15 0.1 – 0.1 + 0.15 0.3 – 0.1 10 ± 0.12 M 0.5 ± 0.2 (8.0) PACKAGE STRUCTURE PACKAGE MATERIAL LEAD TREATMENT LEAD MATERIAL PACKAGE WEIGHT EPOXY RESIN SOLDER / PALLADIUM PLATING COPPER / 42 ALLOY 0.2g DETAIL A SONY CODE EIAJ CODE JEDEC CODE QFP-40P-L01 ∗QFP040-P-0707 —18—