CXA1580Q

CXA1580Q Dolby B Type Noise Reduction System with Playback Equalizer For the availability of this product, please contact the sales office. 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. 40 pin QFP (Plastic) 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). Absolute Maximum Ratings (Ta=25°C) • Supply voltage Vcc 12 • Operating temperature Topr –40 to +85 • Storage temperature Tstg –65 to +150 • Allowable power dissipation PD 430 V °C °C mW Recommended Operating Condition Supply voltage Vcc 6.5 to 11 V Applications • Car stereos • Stereo cassette deck players (playback only) Structure Bipolar silicon monolithic IC * “Dolby” and the double D symbols are trademarks 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— E93503-TE CXD1580Q Block Diagram and Pin Configuration RADIOIN1 LINEOUT1 PBOUT1 TAPEIN1 CDIN1 GND VCT TC1 30 29 28 27 26 25 24 23 22 RADIO/CD 31 INSW 21 NC1 PBTC1 300k 32 TAPE/AUX 19 18 17 16 20 AUXSW TAPESW DRSW NRSW MSSW MODESW PBFB1 PBRIN1 PBFIN1 PBGND E IREF PBFIN2 PBRIN2 PBFB2 PBTC2 33 300k IN A UX TA PE DR NR 10dB LPF G1/G2 35 34 MS MODE 36 15 14 13 12 37 G1 (FF) G2 (NOR) MSTC MSOUT 38 300k 300k 39 DET TAPE/AUX 40 RADIO/CD 1 2 3 4 5 6 7 8 9 10 CDIN2 LINEOUT2 D IREF NC2 TC2 VCC TAPEIN2 RADIOIN2 PBOUT2 —2— MSGND 11 CXD1580Q Pin Description Pin No. 1 30 32 39 33 34 37 38 2 10 29 35 31 40 Symbol PBOUT PBFB PBIN DC I/O value resistance 2.8V 1.4V 0V — 150kΩ 70kΩ Equivalent circuit Refer to Page 6. (Ta=25°C, Vcc=8.0V, no signal) Description PBEQ output PBEQ feedback PBEQ input Vcc GND MSGND PBGND PBTC 8.0V 0.0V — — Power supply Ground — — Vcc PBEQ capacitance 147 31 40 42µ 30µ GND 36 E IREF 1.25V — Vcc Connection of reference current setting resistor for PBEQ block. 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 10k GND —3— CXD1580Q Pin No. 12 Symbol MSTC DC I/O value resistance Approx. 1.4V for signal detection; 5.0V for no signal detection 12 Equivalent circuit VDD Vcc 147 1k 50µ Description Connection of MS detection time constant — GND 13 14 G2(NOR) G1(FF) 4.0V — 10µ Vcc MS feedback 147 13 14 100k 100µ GND 3 28 4 27 5 26 6 TAPEIN 4.0V 40kΩ 3 15µ 28 Vcc TAPE input RADIOIN 147 4 27 40k to VGS RADIO input CDIN 5 26 GND CD input D IREF 1.25V — Vcc Connection of reference current setting resistor for Dolby block 147 8k 6 1.25V 50µ GND 7 24 LINEOUT 4.0V — Vcc Line output 147 200 200 7 24 GND —4— CXD1580Q Pin No. 9 22 Symbol TC DC I/O value resistance 0.3V — Equivalent circuit Vcc X2 0.5µ 20k 6µ 0.5µ Description Connection of Dolby detection capacitor 9 22 147 600k GND 15 17 18 19 20 21 MODESW NRSW DRSW TAPESW AUXSW INSW — — Vcc 15 17 147 18 19 20 21 GND 50µ Refer to Page 6. 16 MSSW — — Vcc 50µ 147 16 50µ Refer to Page 6. GND 25 VCT 4.0V — Vcc 30k 50µ 45k 25 147 to VGS 30k GND Vcc/2 output 8 23 NC — — No connection. —5— CXD1580Q * PBOUT, PBFB, PBIN equivalent circuit Vcc VREG 1k OUT 147 300k FB 1k 147 IN 147 300k 70k GND * 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 —6— CXD1580Q Electrical Characteristics (Ta=25°C, Vcc=8.0V, RL: output load resistance, Rg: head equivalent impedance) Item 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 Playback equalizer amplifier block 120µs FWD frequency characteristics PBREF PBFIN 315Hz –70dBm VPBO=0dB 120µs FWD frequency characteristics F120F 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 Signal detection level 1 Signal detection level 2 MS output leak current MS output saturation voltage Logic voltage F70F F120R THD5 SN2 Vos2 CT4 CT5 VMS1 VMS2 IOH VOL VIL VIH TAPEIN 5kHz AMS ON (G1 mode) TAPEIN 5kHz AMS ON (G2 mode) TAPEIN 5kHz -10dBm, 5V applied to AMSOUT TAPEIN 5kHz -30dBm, 1mA applied to AMSOUT AUXSW, MODESW, INSW, MSSW, TAPESW, NRSW, DRSW PBFIN 2.7kHz –58.5dBm for 315Hz PBFIN 4.5kHz –53.8dBm for 315Hz PBRIN 315Hz –70dBm for 315Hz PBFIN 1kHz –52dBm RL=2.7kΩ No signal "A" weighting filter No signal Rg=2.2kΩ TAPEIN 1kHz –42dBm –1.0 –10.0 0.0 1.0 –27.0 –1.5 –25.0 0.0 –23.0 dBm 1.5 dB Symbol Icc VTIN VRIN VCIN BP1 BP2 BP3 BP4 BP5 THD1 THD2 THD3 THD4 SN1 CT1 CT2 CT3 Vos1 Measurement conditions* (input pin, input level, frequency etc.) No signal LINEOUT= 0 dB 1kHz LINEOUT= 0 dB 1kHz LINEOUT= 0 dB 1kHz TAPEIN 500Hz NR-ON Vlo=–25dB TAPEIN 2kHz NR-ON Vlo=–25dB TAPEIN 5kHz NR-ON Vlo=–25dB TAPEIN 10kHz NR-ON Vlo=–40dB TAPEIN 10kHz NR-ON Vlo=0dB TAPEIN –20dBm 1kHz RL=2.7kΩ TAPEIN –20dBm 1kHz NRON RL=2.7kΩ RADIOIN –20dBm 1kHz RL=2.7kΩ CDIN –20dBm 1kHz RL=2.7kΩ No signal NR ON CCIR/ARM filter TAPEIN –24dBm 1kHz RADIOIN –24dBm 1kHz TAPEIN –24dBm 1kHz No signal Min. 9.0 –32.0 Typ. 12.4 –30.0 Max. Unit 16.0 mA Dolby block (Dolby level -6dBm=0dB) –28.0 dBm 1.4 5.5 3.9 9.7 –1.1 2.9 6.4 5.2 10.4 0.4 0.02 4.4 8.5 6.9 11.9 1.9 0.2 dB — % 77.0 13.0 82.8 14.4 –87 –86 –67 4.0 VOMAX1 1kHz THD=1% RL=2.7kΩ — — –65 –60 –55 4.1 dB dB dB — — — 3.9 V VOMAX2 PBFIN 1kHz THD=1% RL=2.7kΩ —3.0 0.07 58.0 2.8 –78 –75 — 0.5 dBm % dB V dB — 55.0 2.4 — 3.2 –70 –65 Interval detection between tracks (MUSIC SENSOR) block — — — — 0.0 2.5 –35 –55 0.0 0.0 — — 1.0 1.0 1.0 Vcc dBm µA V V V — — *120µs, FWD mode, NR OFF, MS OFF unless otherwise specified. —7— 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. SW INSW AUXSW TAPESW DRSW NRSW MSSW MODESW Function for Low input AUX (CD/RADIO) IN RADIO 70µS PB FWD DOLBY B NR MS OFF G2(NOR) MODE Function for High input TAPE IN CD 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. —8— R43 100 10k 100 S19 0dB or 30dB S17 S18 R42 R41 R40 Electrical Characteristics Measurement Circuit 10k S16 DC Voltmeter R19 100k R25 100k R21138.5k R23 Amp S13 50k S26 R17 5.1k 5.1k R27 5.1k R44 S9 S7 S11 S5 R30 C24 0.1µ OFF : 0dB ON : 30dB GND C29 C10 1µ C22 2.7k 0.1µ R14 2.7k 10µ 30 27 25 21 23 22 R13 29 28 26 24 C13 1µ C15 1µ C17 1µ C18 22µ V1 GND NC1 GND VCT TC1 S28 1.2k 1.2k 31 CDIN1 INSW PBOUT1 TAPEIN1 C2 10n RADIOIN1 R1 R2 32 33 34 17 Power Supply 4.7µ C5 R5 S2 V5 19.2k PBRIN1 DRSW V6 18 GND S1 2.2k C6 V4 R6 PBFB1 TAPESW 19 R10 LINEOUT1 V3 Audio SG PBTC1 AUXSW 33µ 270 C8 20 V2 S29 "A" WTG 19.2k R9 PBFIN1 NRSW V7 S30 35 R15 15k PBGND MSSW MODESW E IREF CXA1580Q 1 5 R32 37 14 38 PBRIN2 PBFB2 13 39 C7 C1 R33 10n C25 MSTC 12 4.7µ 19.2k R7 2.2k 0.1µ 1MEG 40 R12 270 33µ PBOUT2 Vcc TAPEIN2 RADIOIN2 CDIN2 D IREF LINEOUT2 NC2 TC2 PBTC2 MSOUT 11 C12 R11 2.7k 10µ C16 1µ R28 C9 S8 S10 C14 S12 18k C19 2.7k C23 MSGND S6 1µ 2.2µ C21 0.1µ A 1µ 0.1µ S15 C11 10µ R16 5.1k 5.1k R26 5.1k R29 R18 R20 138.5k R22 100k R24 100k S14 —9— S3 4.7µ C3 R8 2.2k C4 R4 36 16 Vcc 4.7µ 2.2k DIN Audio S31 10k R31 1k C27 0.015µ C26 1.5µ 19.2k R3 S4 PBFIN2 G1(FF) G2(NOR) 1kHz BPF R39 10K R38 100 S20 S32 S21 CCIR 1 2 3 5 7 4 6 8 9 10 DC Ammeter AC Voltmeter Distortion Analyzer R37 R36 R35 R34 10k 10k 100 100 S22 S23 S24 S25 CXD1580Q Oscillo -scope Application Circuit 2.2µ 0.22µ C10 0.22µ C15 0.22µ 0.1µ C6 C8 C12 10µ RADIOIN1 LINEOUT1 C13 CDIN1 PBOUT1 TAPEIN1 VCT GND NC1 TC1 INSW H : TAPE, L : AUX TO MICROCOMPUTER AUXSW 20 30 29 28 27 26 25 24 23 22 21 31 R4 10n TAPESW 19 32 C4 PBTC1 RADIO/CD C2 300k 300k PB HEAD PBFB1 PBRIN1 33 18 1k TAPE/AUX TAPE/AUX H : 120µs, L : 70µs DRSW NRSW H : CD, L : RADIO VDD REV1 300k 300k 17 16µ IN IN AUX AUX H : RVS, L : FWD R11 22µ 35 PBGND 36 MSSW PBFIN2 38 37 RVS2 39 PBRIN2 PBFB2 40 G1/G2 G1/G2 DET DET TAPE/AUX TAPE/AUX 13 300k 300k 10dB 10dB LPF 14 C1 C17 0.1µ 10n RADIO/CD RADIO/CD MSOUT 7 8 9 10 R8 R7 NC2 TC2 2.2µ C16 0.1µ MSGND 1k 1 2 3 4 5 6 PBTC2 11 1MEG R3 C3 16µ 300k 300k 12 PBOUT2 Vcc 8V C5 10µ TAPEIN2 C7 0.22µ C9 RADIOIN2 0.22µ C11 0.22µ CDIN2 R6 D IREF 18k C14 LINEOUT2 100k —10— 16 TAPE TAPE 15 R5 DR DR E IREF NR NR 15k MS MS MODE MODE MSSW H : MSON, L : MSOFF MODESW G1 G2 R10 (H : G1, L : G2) C19 10k 0.015µ C18 R9 MSTC 1k 1.5µ L : SIGNAL EXIST H : NO SIGNAL FWD2 LPF C20 FWD1 PBFIN1 34 22k H : OFF, L : DOLBY B CXD1580Q 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. CXD1580Q (1) Signal route Dolby level (–30dBm) PBOUT TAPEIN CDIN RADIOIN (–6dBm) LINEOUT PBFB PBTC Op 1 Op 2 4dB 20dB TAPE AUX 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 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 P B I N 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 0dBm –5 –10 –15 –20 –25 –30 –35 –40 –45 –50 –55 –60 –65 –70 –75 –6dBm Dolby level –30dBm VR adjustment –30dBm (400Hz 217nWb/m) Dolby level –30dBm –30dBm –70dBm (315Hz 160n/Wb/m) —11— CXD1580Q (3) Adjustment of playback equalizer R1 C2 C1 2 3 PBTC Ri PBOUT G1 3 PBFB 1 R3 G2 G3 2 fc Fig. 4 PBIN F R E IREF 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), (G1G3). 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. G1=20log R1+R3 R1 G2=G3=20log R1+Ri 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. —12— CXD1580Q (4) MS (interval detection between tracks) adjustment method 2 NOR (BS) G1 G2 FF (AMS) 1 1 2 MSTC 25kHz LPF TAPEIN 10dB DET MSOUT Ri G1 G2 1 2 R1 C1 1 R2 C2 2 Fig. 5 1) MS gain (G1/G2 mode gain) adjustment → External resistors R1, R2 MS gain is expressed by the following equations. G1=10+20log R1+Ri R1 (dB) G2=10+20log R2+Ri R2 (dB) 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 cutoff frequency of MS frequency characteristics. —13— CXD1580Q Characteristics Graphs Current consump tion vs. Sup p ly voltage Ta=25˚C For no signal NR OFF, MS OFF V cc=8.0V NR OFF, MS OFF Outp ut level 25dBm constant Playb ack equalizer frequency characteristics Ta=25˚C 60 Current consump tion [mA] G ain [dB ] 50 12.5 40 120µs 30 70µs 12.0 50 100 1k 10k Frequency [Hz] OUT 300k 11.5 0.01µ 7.0 8.0 9.0 10.0 11.0 12.0 33µ 270 Sup p ly voltage [V] Decode b oost frequency characteristics Ta=25˚C V cc=8.0V 0dB=Dolb y Level –40dB 10 Decode b oost [dB ] 8 –30dB 6 4 2 0 100 1k –20dB –10dB 0dB 10k Frequency [Hz] —14— CXD1580Q Total harmonic distortion (p re-amp lifier b lock) Ta=25˚C 101 Total harmonic distortion (Dolb y b lock) Ta=25˚C 100 Inp ut : PB FIN1 O utp ut : PB O UT1 Vcc=8.0V f=10kHz Inp ut : TAPEIN1 O utp ut : LINEO UT1 Vcc=8.0V 0dB =Dolb y Level Distortion [%] Distortion [%] OFF f= 1kHz 10–1 ON f=100Hz 100 f=1kHz ON f=10kHz f=100Hz 10–1 10–2 OFF f=1kHz –24 –20 –16 –12 –8 –4 0 –6 –2 2 6 10 14 O utp ut level [dB m] O utp ut level [dB m] Rip p le elimination ratio (PB O UT) 0 V cc=8.0V R L=2.7kΩ Ta=25˚C 0 Rip p le elimination ratio (LINEO UT) Ta=25˚C V cc=8.0V –10 Rip p le elimination ratio [dB ] –10 –20 Rip p le elimination ratio [dB ] –20 –30 –40 –30 NR OFF –40 NR ON –50 –50 –60 –60 –70 100 1k 10k –70 100 1k 10k Frequency [Hz] Frequency [Hz] —15— CXD1580Q –20 Cross talk b etween channels (1ch → 2ch) V cc=8.0V Inp ut : PBFIN1 Outp ut : LINEOUT1 Ta=25˚C –30 Cross talk [dB ] –40 –50 –60 –70 20 100 1k 10k Frequency [Hz] B lank detection level frequency characteristics –10 Ta=25˚C V cc=8.0V Ta=25˚C Inp ut : TA PEIN1 Inp ut level [dB m] –20 –30 HPF gain 20dB –40 –50 HPF gain 40dB –60 20 100 1k 10k Frequency [Hz] Ta=25˚C MS b lock gain vs. B lank detection level V cc=8.0V Ta=25˚C Inp ut : TA PEIN1 f=1kHz –30 Inp ut level [dB m] –40 –50 –60 –70 10 20 30 40 50 60 HPF gain [dB ] —16— CXD1580Q 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 —17—