TDA7465 DIGITALLY CONTROLLED AUDIO PROCESSOR WITH SRS SURROUND SOUND AND VOICE CANCELLER The Device incorporates the SRS (Sound Retrieval System) under licence from SRS Labs, Inc. 1 STEREO INPUT AND 1 MIXER INPUT INPUT ATTENUATION CONTROL IN 0.5dB STEP TREBLE MIDDLE AND BASS CONTROL VOICE CANCELLER IS AVAILABLE STEREO SRS SURROUND SOUND WITH CENTER & SPACE CONTROL IS AVAILABLE THREE STANDARD SURROUND MODES ARE AVAILABLE: - MUSIC IN 4 DIFFERENT SELECTABLE RESPONSES - MOVIE AND SIMULATED IN 256 DIFFERENT SELECTABLE RESPONSES REAR OUTPUT IS AVAILABLE TO DRIVE EXTRA SURROUND SPEAKERS 2 SPEAKERS OUTPUTS - INDEPENDENT ATTENUATORS IN 1dB STEP FOR BALANCE FACILITY - ZERO CROSSING ATTENUATION AVAILABLE - INDEPENDENT MUTE FUNCTION 2 RECORD OUTPUTS - INDEPENDENT ATTENUATORS IN 1dB STEP FOR BALANCE FACILITY - MUX AVAILABLE FOR PROCESSES SIGNAL SELECTION - INDEPENDENT MUTE FUNCTION ALL FUNCTIONS PROGRAMMABLE VIA SERIAL BUS ADDRESS PIN AVAILABLE DESCRIPTION The TDA7465 is a volume tone (bass middle and treble) balance (Left/Right) processors with stereo SRS and voice canceller for quality audio applications in car radio, Hi-Fi, TV systems. It reproduces SRS (Sound Retrieval System) sound by external components and surround sound by using phase shifters and a signal matrix. The AC signal setting is obtained by resistor networks and switches combined with operational amplifiers according to the SRS laboratories specification. An Extra Mix Input is available to May 1997 SDIP42 ORDERING NUMBER: TDA7465 PIN CONNECTION VS PS4 PS3 PS2 PS1 LP LP1 HP1 HP2 VAR_L BASSO_L VAR_R BASSO_R BASS_LO BASS_LI BASS_RO BASS_RI MIDDLE_LO MIDDLE_LI MIDDLE_RO MIDDLE_RI 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 CREF REAR_OUT REAR_IN LPVC R_IN VREFOUT L_IN MIX NETW2 NETW1 RECOUT_L RECOUT_R L_OUT R_OUT DIG_GND SCL SDA ADDR AGND TREBLE_L TREBLE_R D96AU479B connect microphone for KARAOKE feature. Control of all the functions is accomplished by serial bus. Thanks to the used BIPOLAR/CMOS Technology, Low Distortion, Low Noise and DC stepping are obtained. 1/20 L-IN R-IN 0.22µF 0.22µF 38 36 50K 50K 31.5dB control 100nF LPVC 39 LPF - + RLP1 1 VS RHP1 9 8 7 31.5dB control HP1 24 + + VOICE ON R6 42 SUPPLY + - R5 HP2 AGND LP1 22µF 37 VREF VREFOUT + L-R 0.47µF 32.4K 4.42K 1.5K 130K 1K 0.47µF 1.2nF NETW2 NETW1 LP CENTER MIX STEREO SRS EFFECT CONTROL 34 LPF 9KHz OFF MOVIE/ SIM PS3 400Hz RPS3 3 33 MOVIE/ MUSIC MUSIC PS2 4KHz RPS2 4 PS3 6 1µF 100K MIX SW + - SIM PS1 90Hz RPS1 5 PS2 22nF 35 + + MIX SW PS1 4.7nF 47.5K SRS FIX SPACE 41 4.7nF 5.6nF 40 FIX SURR 5.6nF 21 22 18 22nF 2.7K 18nF 22nF RM 20 MIDDLE TREBLE 50K MIDDLE 19 RM 2.7K 18nF TREBLE 23 TREBLE-L 2.2µF SURR MIXING AMP MIXING AMP 2 3.74K PS4 400Hz RPS4 PS4 22nF REAR_IN 100nF TREBLE-R SRS REAR_OUT MIDDLE-LI MIDDLE-RI 680nF 5.6K 100nF MUTE REC ATT 79dB CONTROL 3BAND BASS-RO FIX BASSO-R 79dB CONTROL MUTE REC ATT 11 BASSO-L I2C BUS DECODER + LATCHES 3BAND FIX 100nF RB 16 SURR REAR REAR BASS 17 RB 14 SURR BASS 15 BASS-LO 100nF BASS-LI 5.6K 100nF BASS-RI MIDDLE-LO MIDDLE-RO 2/20 5.6nF 2.2µF 13 10 2.2µF 30K VAR-R 12 VAR FIX FIX VAR 30K VAR-L - - + + N.B. SW MUTE 31 29 25 28 26 27 30 32 2.7K 4.7µF RECOUT-R 2.7K 4.7µF R-OUT ADDR DIG_GND SDA SCL L-OUT RECOUT-L D96AU480C SPKR ATT 79dB CONTROL MUTE SPKR ATT 79dB CONTROL N.B. SW TDA7465 BLOCK DIAGRAM CREF TDA7465 THERMAL DATA Symbol R th j-pins Description Thermal Resistance Junction-pins Value Unit 85 °C/W Ma x. ABSOLUTE MAXIMUM RATINGS Symbol VS Parameter Value Operating Supply Voltage T amb Operating Ambient Temperature Tstg Storage Temperature Range Unit 11 V -10 to 85 °C -55 to +150 °C QUICK REFERENCE DATA Symbol Min. Typ. Max. VS Supply Voltage Parameter 7 9 10.2 VCL Max. input signal handling 2 Total Harmonic Distortion V = 1Vrms f = 1KHz 0.01 S/N Signal to Noise Ratio V out = 1Vrms (mode = OFF) 106 SC Channel Separation f = 1KHz Treble Control 0.1 % dB 90 -31.5 (2db step) V Vrms THD Input Attenuation Control (0.5dB) Unit dB 0 dB -14 +14 dB Middle Control (2db step) -14 +14 dB Bass Control (2dB step) -14 +14 dB Balance Control 1dB step (LCH, RCH) -79 Mute Attenuation 0 100 dB dB ELECTRICAL CHARACTERISTICS (refer to the test circuit Tamb = 25°C, VS = 9V, RL = 10KΩ, Vin = 1Vrms; RG = 600Ω, all controls flat (G = 0dB), Effect Ctrl = -6dB, MODE = OFF; f = 1KHz unless otherwise specified) Symbol Parameter Test Condition Min. Typ. Max. 9 10.2 Unit SUPPLY VS Supply Voltage IS Supply Current SVR Ripple Rejection 7 LCH / RCH out, Mode = OFF 60 V 25 mA 80 dB INPUT STAGE R IN Input Resistance V CL Clipping Level ARANGE THD = 0.3% 37.5 50 2 2.5 Vrms 31.5 dB Attenuation Range 62.5 KΩ AVMIN Min. Attenuation -1 0 1 AVMAX Max. Attenuation 31 31.5 32 dB dB ASTEP Step Resolution -1 0.5 1 dB VDC DC Steps Adjacent att. step -3 0 3 mV AVO1 Voice Canceller Output 1 LIN = RIN, R IN = ON, Vmix = 0V FIX, 0dB attenuation 5 6 7 dB AVO2 Voice Canceller Output 2 LIN = RIN = 0V Vmix = 1Vrms FIX, 0dB attenuation -1 0 1 dB 3/20 TDA7465 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter Test Condition Min. Typ. Max. Unit 5 6 7 dB SUPPLY AVO3 Voice Canceller Output 3 LIN = -RIN, Vmix = 0V FIX, 0dB attenuation RLPV Low Pass Filter Resistance 24 32 40 KΩ RMIX Input Impedance 75 100 125 KΩ dB BASS CONTROL Gb BSTEP RB Control Range +12.0 +14.0 +16.0 Step Resolution Max. Boost/cut 1 2 3 dB Internal Feedback Resistance 33 44 55 KΩ +12.0 +14.0 +16.0 dB 1 2 3 dB 18.75 25 31.25 KΩ +13.0 +14.0 +15.0 dB 1 2 3 dB MIDDLE CONTROL Gm M STEP RM Control Range Max. Boost/cut Step Resolution Internal Feedback Resistance TREBLE CONTROL Gt TSTEP Control Range Max. Boost/cut Step Resolution STANDARD SURROUND SOUND MATRIX TEST CONDITION (Phase Resistor Selection D0=0, D1=1, D2=0. D3=1, D4=0, D5=1, D6=0, D7=1 Symbol Parameter Test Condition Min. Typ. Max. Unit GOFF In-phase Gain (OFF) Mode OFF, Input signal of 1kHz, 1.4 Vp-p, Rin → Rout L in → Lout -1 0 1 dB D GOFF LR In-phase Gain Difference (OFF) Mode OFF, Input signal of 1kHz, 1.4 Vp-p R in → Rout, Lin → Lout -1 0 1 dB GMOV In-phase Gain (Movie) Movie mode, Effect Ctrl = -6dB Input signal of 1kHz, 1.4 Vp-p R in → Rout, Lin → Lout 8 dB DGMOV LR In-phase Gain Difference (Movie) Movie mode, Effect Ctrl = -6dB Input signal of 1kHz, 1.4 Vp-p (Rin → Rout) – (Lin → Lout) 0 dB GMUS In-phase Gain (Music) Music mode, Effect Ctrl = -6dB Input signal of 1kHz, 1.4 Vp-p (Rin → Rout), (Lin → Lout) 7 dB D GMUS LR In-phase Gain Difference (Music) Music mode, Effect Ctrl = -6dB Input signal of 1kHz, 1.4 Vp-p (Rin → Rout) - (Lin → Lout) 0 dB L MON1 Simulated L Output 1 Simulated Mode, Effect Ctrl = -6dB Input signal of 250Hz, 1.4 Vp-p, Rin and Lin → Lout 4.5 dB LMON2 Simulated L Output 2 Simulated Mode, Effect Ctrl = -6dB Input signal of 1kHz, 1.4 Vp-p, Rin and Lin → Lout – 4.0 dB L MON3 Simulated L Output 3 Simulated Mode, EffectCtrl = 6dB Input signal of 3.6kHz, 1.4 Vp-p, Rin and Lin → Lout 7.0 dB 4/20 TDA7465 ELECTRICAL CHARACTERISTICS (continued) Symbol R MON1 Parameter Simulated R Output 1 R MON2 Simulated R Output 2 R MON3 Simulated R Output 3 RLP1 R HPI RLPF R REARIN RREAROUT VOUT Test Condition Simulated Mode, Effect Ctrl = -6dB Input signal of 250Hz, 1.4 Vp-p, Rin and Lin →Rout Simulated Mode, Effect Ctrl = -6dB Input signal of 1kHz, 1.4 Vp-p, Rin and Lin →Rout Simulated Mode, Effect Ctrl = -6dB Input signal of 3.6kHz, 1.4 Vp-p, Rin and Lin → Rout Low Pass Filter Resistance High Pass Filter Resistance LP Pin Impedance Rear Input Resistance Rear Output Resistance DC Rear Voltage Level D6 = 0 D6 = 0 D6 = 0 Min. Typ. – 4.5 Max. Unit dB 3.8 dB – 20 dB 7.5 45 10 60 12.5 75 KΩ KΩ 7.5 37.5 10 10 50 30 4.5 12.5 62.5 50 KΩ KΩ Ω V STANDARD SURROUND SOUND EFFECT CONTROL C RANGE SSTEP Control Range - 21 Step Resolution -6 1 dB dB SURROUND SOUND MATRIX PHASE R PS10 R PS11 R PS12 R PS13 R PS20 R PS21 Phase Phase Phase Phase Phase Phase Shifter Shifter Shifter Shifter Shifter Shifter 1: D1 1: D1 1: D1 1: D1 2: D3 2: D3 = 0, D0 = 0, D0 = 1, D0 = 1, D0 = 0, D2 = 0, D2 =0 =1 =0 =1 =0 =1 8.8 10.6 13.4 28 4.2 5.1 11.8 14.1 17.9 37.3 5.6 6.8 14.8 17.6 22.4 46.6 7 8.5 KΩ KΩ KΩ KΩ KΩ KΩ R PS22 R PS23 R PS30 R PS31 R PS32 R PS33 R PS40 Phase Phase Phase Phase Phase Phase Phase Shifter Shifter Shifter Shifter Shifter Shifter Shifter 2: D3 2: D3 3: D5 3: D5 3: D5 3: D5 4: D7 = 1, D2 = 1, D2 = 0, D4 = 0, D4 = 1, D4 = 1, D4 = 0, D6 =0 =1 =0 =1 =0 =1 =0 6.3 13.7 9 10.9 13.6 29.3 9 8.4 18.3 12.1 14.5 18.1 39.1 12.1 10.5 22.9 15.1 18.1 22.6 48.9 15.1 KΩ KΩ KΩ KΩ KΩ KΩ KΩ SRS SURROUND SOUND MATRIX CENTER Step C SPACE SRS Control Range Space Step Resolution PERSP1 Perspective 1 PERSP2 0 1 SRS Space Control Range Step S L+R -31 Center Step Resolution -31 dB dB 0 dB 1 dB Input Signal of 125Hz SPACE = 0dB, CENTER = MUTE Rin = GND; Lin → ROUT 12 dB Perspective 2 Input Signal of 2.15KHz SPACE = 0dB, CENTER = MUTE Rin = GND; Lin → ROUT 0 dB L+ R SRS Curve SPACE = MUTE, CENTER =0dB Rin = GND; Lin → ROUT -8.5 dB 5/20 TDA7465 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter Test Condition Min. Typ. Max. Unit SPEAKER & RECORD ATTENUATORS Crange Control Range SSTEP Step Resolution EA VDC Attenuation set error DC Steps AMUTE Output Mute Condition RVAR Input Impedance 79 0.5 Av = 0 to -20dB dB 1 1.5 dB -1.5 0 1.5 dB Av = -20 to -79dB -3 0 2 dB Adjacent att. steps -3 0 3 mV 70 100 22.5 30 37.5 KΩ dB SPEAKER ATTENUATORS V TH Zero CrossingThreshold D7 = 0 VS + 20 2 mV AUDIO OUTPUTS NO(OFF) Output Noise (OFF) Output Mute, Flat BW = 20Hz to 20KHz 4 5 µVrms µVrms NO(MOV) Output Noise (Movie) Standard Surround Sound Mode =Movie , BW = 20Hz to 20KHz 30 µVrms NO(MUS) Output Noise (Music) Standard Surround Sound Mode = Music , BW = 20Hz to 20KHz, 30 µVrms NO(SIM) Output Noise (Simulated) Standard Surround Sound Mode = Simulated, BW = 20Hz to 20KHz 30 µVrms NO(SRS) Output Noise (SRS) Surround Sound BW = 20Hz to 20KHz 50 µVrms d Distorsion Av = 0 ; Vin = 1Vrms 0.01 SC Channel Separation VOCL Clipping Level ROUT Output Resistance VOUT DC Voltage Level d = 0.3% 0.1 % 70 90 dB 2 2.5 Vrms 10 30 50 3.8 Ω V BUS INPUTS 6/20 V IL Input Low Voltage VIH Input High Voltage IIN Input Current VO Output Voltage SDA Acknowledge 1 3 -5 IO = 1.6mA V V +5 µA 0.4 V TDA7465 I2C BUS INTERFACE Data transmission from microprocessor to the TDA7465 and viceversa takes place through the 2 wires I2C BUS interface, consisting of the two lines SDA and SCL (pull-up resistors to positive supply voltage must be connected). Data Validity As shown in fig. 3, the data on the SDA line must be stable during the high period of the clock. The HIGH and LOW state of the data line can only change when the clock signal on the SCL line is LOW. Start and Stop Conditions As shown in fig.4 a start condition is a HIGH to LOW transition of the SDA line while SCL is HIGH. The stop condition is a LOW to HIGH transition of the SDA line while SCL is HIGH. Byte Format Every byte transferred on the SDA line must contain 8 bits. Each byte must be followed by an ac- knowledge bit. The MSB is transferred first. Acknowledge The master (µP) puts a resistive HIGH level on the SDA line during the acknowledge clock pulse (see fig. 5). The peripheral (audioprocessor) that acknowledges has to pull-down (LOW) the SDA line during this clock pulse. The audioprocessor which has been addressed has to generate an acknowledge after the reception of each byte, otherwise the SDA line remains at the HIGH level during the ninth clock pulse time. In this case the master transmitter can generate the STOP information in order to abort the transfer. Transmission without Acknowledge Avoiding to detect the acknowledge of the audioprocessor, the µP can use a simpler transmission: simply it waits one clock without checking the slave acknowledging, and sends the new data. This approach of course is less protected from misworking. 2 Figure 3: Data Validity on the I CBUS Figure 4: Timing Diagram of I2CBUS Figure 5: Acknowledge on the I2CBUS 7/20 TDA7465 address A subaddress bytes A sequence of data (N byte + achnowledge) A stop condition (P) SOFTWARE SPECIFICATION Interface Protocol The interface protocol comprises: A start condition (S) A chip address byte, containing the TDA7465 CHIP ADDRESS SUBADDRESS MSB S 1 LSB 0 0 0 0 0 A 0 MSB ACK DATA 1 to DATA n LSB B DATA MSB ACK LSB DATA ACK P D95AU226A ACK = Achnowledge S = Start P = Stop A = Address B = Auto Increment EXAMPLES No Incremental Bus The TDA7465 receives a start condition, the cor- CHIP ADDRESS SUBADDRESS MSB S 1 LSB 0 0 0 0 0 rect chip address, a subaddress with the MSB = 0 (no incremental bus), N-data (all these data concern the subaddress selected), a stop condition. A 0 MSB ACK 0 DATA LSB X X MSB X D3 D2 D1 D0 ACK LSB DATA ACK P D95AU306 Incremental Bus The TDA7465 receives a start condition, the correct chip address, a subaddress with the MSB = 1 (incremental bus): now it is in a loop condition with an autoincrease of the subaddress whereas CHIP ADDRESS SUBADDRESS MSB S 1 LSB 0 0 0 D95AU307 8/20 0 0 SUBADDRESS from ”1XXX1010” to ”1XXX1111” of DATA are ignored. The DATA 1 concerns thesubaddress sent, and the DATA 2 concerns the subaddress sent plus one in the loop etc. and, at the end, it receives the stop condition. A 0 MSB ACK 1 DATA 1 to DATA n LSB X X X D3 D2 D1 D0 ACK MSB LSB DATA ACK P TDA7465 DATA BYTES (Address = 80(HEX) [82(HEX) if ADDRESS pin is connected to VS] FUNCTION SELECTION: The first byte (subaddress) MSB LSB SUBADDRESS D7 D6 D5 D4 D3 D2 D1 D0 B X X X 0 0 0 0 INPUT ATTENUATION B X X X 0 0 0 1 SURROUND & OUT & EFFECT CONTROL B X X X 0 0 1 0 PHASE RESISTOR B X X X 0 0 1 1 BASS B X X X 0 1 0 0 MIDDLE & TREBLE B X X X 0 1 0 1 SPEAKER ATTENUATION ”L” B X X X 0 1 1 0 SPEAKER ATTENUATION ”R” B X X X 0 1 1 1 RECORD ATTENUATION ”L” B X X X 1 0 0 0 RECORD ATTENUATION”R” B X X X 1 0 0 1 VOICE CANCELLER & REC OUT B X X X 1 0 1 0 SRS / SPACE ATTENUATION B X X X 1 0 1 1 SRS / CENTER ATTENUATION B = 1 INCREMENTAL BUS; ACTIVE B = 0 NO INCREMENTAL BUS; X = DONT’ CARE INPUT ATTENUATION SELECTION MSB D7 D6 0 0 0 0 0 0 0 0 D5 D4 D3 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 LSB INPUT ATTENUATION D0 0 1 0 1 0 1 0 1 0.5 dB STEPS 0 -0.5 -1 -1.5 -2 -2.5 -3 -3.5 4 dB STEPS 0 -4 -8 -12 -16 -20 -24 -28 INPUT ATTENUATION = 0 ∼ -31.5dB 9/20 TDA7465 STANDARD SURROUND SELECTION MSB D7 LSB D6 D5 D4 D3 D2 D1 0 0 1 1 D0 0 1 0 1 0 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 SURROUND MODE SIMULATED MUSIC OFF MOVIE OUT VAR FIX EFFECT CONTROL -6 -7 -8 -9 -10 -11 -12 -13 -14 -15 -16 -17 -18 -19 -20 -21 PHASE RESISTOR SELECTION MSB D7 LSB D6 D5 0 0 1 1 0 0 1 1 10/20 0 1 0 1 D4 0 1 0 1 D3 D2 0 0 1 1 0 1 0 1 D1 0 0 1 1 D0 0 1 0 1 SURROUND PHASE RESISTOR PHASE SHIFT 1 (KΩ) 12 14 18 37 PHASE SHIFT 2 (KΩ) 6 7 8 18 PHASE SHIFT 3 (KΩ) 12 14 18 39 PHASE SHIFT 4 (KΩ) 12 14 18 39 TDA7465 BASS SELECTION MSB D7 D6 D5 D4 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 D2 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 D1 0 0 1 1 0 0 1 1 1 1 0 0 1 1 0 0 LSB BASS D0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 2 dB STEPS -14 -12 -10 -8 -6 -4 -2 0 0 2 4 6 8 10 12 14 11/20 TDA7465 MIDDLE & TREBLE SELECTION MSB D7 D6 D5 D4 LSB MIDDLE D3 D2 D1 D0 2 dB STEPS 0 0 0 0 -14 0 0 0 1 -12 0 0 1 0 -10 0 0 1 1 -8 0 1 0 0 -6 0 1 0 1 -4 0 1 1 0 -2 0 1 1 1 0 1 1 1 1 0 1 1 1 0 2 1 1 0 1 4 1 1 0 0 6 1 0 1 1 8 1 0 1 0 10 1 0 0 1 12 1 0 0 0 14 TREBLE 2 dB STEPS 0 0 0 0 -14 0 0 0 1 -12 0 0 1 0 -10 0 0 1 1 -8 0 1 0 0 -6 0 1 0 1 -4 0 1 1 0 -2 0 1 1 1 0 1 1 1 1 0 1 1 1 0 2 1 1 0 1 4 1 1 0 0 6 1 0 1 1 8 1 0 1 0 10 1 0 0 1 12 1 0 0 0 14 12/20 TDA7465 LEFT CHANNEL SPEAKER ATTENUATION SELECTION MSB D7 D6 D5 D4 D3 0 0 0 0 0 0 0 0 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 0 0 1 1 0 0 0 1 0 1 0 1 0 1 0 1 1 1 0 1 1 X X X D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 LSB SPEAKER/RECORD ATT D0 0 1 0 1 0 1 0 1 1 dB STEPS 0 -1 -2 -3 -4 -5 -6 -7 8 dB STEPS 0 -8 -16 -24 -32 -40 -48 -56 -64 -72 MUTE LSB ZERO CROSS ATT. MODE D0 1 dB STEPS ON OFF LEFT & RIGHT CHANNELS BOTH MSB D7 0 1 D6 D5 D4 D3 D2 D1 X = DON’ TCARE SPEAKER/RECORD ATTENUATION = 0dB ∼ -79dB 13/20 TDA7465 RECORD AND RIGHT CHANNEL SPEAKER ATTENUATION SELECTION MSB D7 D6 D5 D4 D3 0 0 0 0 0 0 0 0 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 0 0 1 1 0 0 0 1 0 1 0 1 0 1 0 1 1 1 0 1 1 X X X D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 LSB SPEAKER/RECORD ATT D0 0 1 0 1 0 1 0 1 1 dB STEPS 0 -1 -2 -3 -4 -5 -6 -7 8 dB STEPS 0 -8 -16 -24 -32 -40 -48 -56 -64 -72 MUTE X = DON’T CARE SPEAKER/RECORD ATTENUATION = 0dB ∼ -79dB VOICE CANCELLER RECOUT L & R SELECTION MSB D7 LSB D6 0 0 1 1 0 1 14/20 D5 0 1 0 1 D4 D3 D2 1 1 D1 1 1 0 0 1 1 0 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D0 0 1 VOICE CANCELLER OFF ON REC OUT ”L” VAR 1 (3BAND) VAR 2 (SURR) VAR 3 (REAR) FIX REC OUT ”R” VAR 1(3BAND) VAR 2 (SURR) VAR 3 (REAR) FIX MIX SWITCH MIX PIN ACTIVE NO MIX PIN TDA7465 SRS SPACE CONTROL: ATTENUATION SELECTION MSB D7 D6 D5 D4 D3 0 0 0 0 0 0 1 1 0 1 0 1 1 X X LSB SPACE ATTENUATION D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 D0 0 1 0 1 0 1 0 1 1 dB STEPS 0 -1 -2 -3 -4 -5 -6 -7 8 dB STEPS 0 -8 -16 -24 MUTE X X X X = DON’T CARE SPEAKER/RECORD ATTENUATION = 0dB ∼ -31dB SRS CENTER CONTROL: ATTENUATION SELECTION MSB D7 D6 0 1 0 1 D5 D4 D3 0 0 0 0 0 0 1 1 0 1 0 1 1 X X LSB CENTER ATTENUATION 1 dB STEPS 0 -1 -2 -3 -4 -5 -6 -7 8 dB STEPS 0 -8 -16 -24 MUTE D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 D0 0 1 0 1 0 1 0 1 X X X SRS INPUT NO SURROUND SIGNAL SURROUND SIGNAL SRS SWITCH SRS ON SRS OFF X = DONT’ CARE SPACE ATTENUATION = 0dB ∼ -31dB RECOMMENDED TO ATTENUATE -3dB IN INPUT ATTENUATION DURING ”SRS OFF” TO FULFILL SRS BYPASS MODE WHEN SRS FUNCTION IS USED 15/20 TDA7465 POWER ON RESET SURROUND & OUT CONTROL+ EFFECT CONTROL OFF + FIX + MAX ATTENUATION SPEAKER/RECORD ATTENUATION L &R MODE MUTE + ZERO CROSS ATT.OFF INPUT ATTENUATION + REAR SWITCH MAX ATTENUATION + ON VOICE CANCELLER OFF INPUT IN1 MIX SWITCH NO MIX PIN SRS SURROUND OFF + MAX ATTENUATION BASS & MIDDLE 2dB TREBLE 0dB PIN DESCRIPTION PIN: REAR OUT PIN: HP1 LP1 VS VS 10K 20µA 10Ω 60K GND HP2 D96AU472 PIN: HP2 GND D94AU198 PIN: MIX VS VS 20µA 20µA 5.5K 60K HP1 GND 5.5K D94AU199 16/20 100K VREF D96AU478 TDA7465 PINS: VAR-L, VAR-R, PIN: CREF VS VS 20µA 20µA 20K 42K SW 30K 20K GND Vref D95AU227 D95AU336 GND PINS: SCL, SDA PIN: LP1 VS 20µA 20µA 10K GND GND HP1 D94AU205 D94AU211 PINS: PS1, PS2, PS3, PS4, LP PINS: L-OUT, R-OUT, RECOUT-L, RECOUT-R VS VS 20µA 10Ω GND GND 20µA GND D95AU308 D96AU477 GND 17/20 TDA7465 PINS: BASSO-L, BASSO-R PINS: BASS-LI,BASS-RI,MIDDLE-LI, MIDDLE-RI, VS VS 20µA 20µA 45K : Bass or 25K : MIDDLE GND BASS-LO GND BASS-RO,MIDDLE-LO,MIDDLE-RO D95AU231A D95AU230 PINS: BASS-LO, BASS-RO, MIDDLE-LO, MIDDLE- PINS: TREBLE-L, TREBLE-R VS VS 20µA 20µA (*) 25K GND BASS-LI,BASS-RI,MIDDLE-LI,MIDDLE-RI D95AU232 GND (*) 45K : Bass 25K : MIDDLE D95AU309 PINS: L-IN, R-IN PIN: VOUT REF VS VS 20µA 20µA GND 50K D95AU233A 10K GND 18/20 GND VREF D94AU200 TDA7465 SDIP42 PACKAGE MECHANICAL DATA mm DIM. MIN. inch TYP. MAX. A MIN. TYP. MAX. 5.08 0.20 A1 0.51 0.020 A2 3.05 3.81 4.57 0.120 0.150 0.180 B 0.38 0.46 0.56 0.0149 0.0181 0.0220 B1 0.89 1.02 1.14 0.035 0.040 0.045 c 0.23 0.25 0.38 0.0090 0.0098 0.0150 D 36.58 36.83 37.08 1.440 1.450 1.460 E 15.24 16.00 0.60 E1 12.70 14.48 0.50 13.72 0.629 0.540 e 1.778 0.070 e1 15.24 0.60 0.570 e2 18.54 0.730 e3 1.52 0.060 L 2.54 3.30 3.56 0.10 0.130 0.140 E A2 A L A1 E1 B B1 e e1 e2 D c E 42 22 .015 0,38 Gage Plane 1 e3 21 e2 SDIP42 19/20 TDA7465 Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as criticalcomponents in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. 1997 SGS-THOMSON Microelectronics – Printed in Italy – All Rights Reserved The Sound Retrieval System and are registered trademarks of SRS Labs, Inc. SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 20/20