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TDA7466
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 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 2 SPEAKERS OUTPUTS - INDEPENDENT ATTENUATORS IN 1dB STEP FOR BALANCE FACILITY - ZERO CROSSING ATTENUATION AVAILABLE - AVAILABILITY OF LOUDSPEAKERS EQUALIZATION FIXED BY EXTERNAL COMPONENTS - 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
SDIP42
ORDERING NUMBER: TDA7466
PIN CONNECTION
DESCRIPTION The TDA7466 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. Control of all the functions is acMay 1997
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
D96AU445A
42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22
CREF NBRO NBRIN LPVC R_IN VREFOUT L_IN NBLIN NBLO NETW2 NETW1 RECOUT_L RECOUT_R L_OUT R_OUT DIG_GND SCL SDA AGND TREBLE_L TREBLE_R
complished by serial bus. Thanks to the used BIPOLAR/CMOS Technology, Low Distortion, Low Noise and DC stepping are obtained.
1/21
MIDDLE-LI
LP1 5 MIX SW RPS1 FIX 30K + RPS2 RPS3 RPS4 RM RB 4 3 2 23 19 18 15 14 11 10 35 34
HP1
HP2
PS1
PS2
PS3
PS4
TREBLE-L
MIDDLE-LO
SRS
AGND
CREF
VREFOUT
MIDDLE-RI
5.6nF 4.42K 1.5K 32.4K 47.5K 4.7nF
18nF 2.7K
22nF
MIDDLE-RO
100nF 0.47F 130K
22F
1.2nF
BASS-RI
2/21
NB1 100nF 2.2F NB2 VAR-L NBLIN NBLO BASS-LI BASS-LO BASSO-L NB-LA NB-LB 100nF 4.7nF 22nF 22nF 5.6nF 2.7K 18nF 5.6K 22nF 100nF PS1 90Hz MUSIC MOVIE/ SIM SRS SURR REAR MUTE 3BAND 26 25 I2C BUS DECODER + LATCHES 27 OFF FIX SURR REC ATT VAR FIX 79dB CONTROL 79dB CONTROL + SPKR ATT MUTE PS2 4KHz PS3 400Hz PS4 400Hz 31 RECOUT-L 29 + MIXING AMP TREBLE MIDDLE BASS + L-R MOVIE/ MUSIC SIM L-OUT SCL SDA DIG_GND LPF 9KHz TREBLE SURR MIDDLE BASS FIX FIX + 3BAND FIX REAR SURR 100K CENTER 33 22 TREBLE-R NETW2 SPACE 21 37 LP 1K NETW1 6 32 STEREO SRS REC ATT MUTE 30K RM 20 17 RB 16 BASS-RO 79dB CONTROL BASSO-R 2.2F 100nF 5.6K NB4 100nF NB-RA 13 12 VAR-R 40 NBRIN NB3 NB-RB 41 NBRO
D96AU446B
TDA7466
BLOCK DIAGRAM
5.6nF
680nF
0.22F
7 31.5dB control
8
9
36
L-IN
50K
RLP1 RHP1
R5
R6
-
+
+
+
EFFECT CONTROL
MIXING AMP 79dB CONTROL SPKR ATT VAR MUTE 30 RECOUT-R 28
-
R-OUT
0.22F + V REF
38
LPF
+
VOICE ON
R-IN
50K
100K
31.5dB control
SUPPLY
39
1
24
42
LPVC
VS
0.47F
3.74K
TDA7466
THERMAL DATA
Symbol R th j-pins Thermal Resistance Junction-pins Description Ma x. Value 85 Unit C/W
ABSOLUTE MAXIMUM RATINGS
Symbol VS T amb Tstg Operating Supply Voltage Operating Ambient Temperature Storage Temperature Range Parameter Value 11 -10 to 85 -55 to +150 Unit V C C
QUICK REFERENCE DATA
Symbol VS VCL THD S/N SC Supply Voltage Max. input signal handling Total Harmonic Distortion V = 1Vrms f = 1KHz Signal to Noise Ratio V out = 1Vrms (mode = OFF) Channel Separation f = 1KHz Input Attenuation Control (0.5dB) Treble Control (2db step) Middle Control (2db step) Bass Control (2dB step) Balance Control Mute Attenuation 1dB step (LCH, RCH) -31.5 -14 -14 -14 -79 100 Parameter Min. 7 2 0.01 106 90 0 +14 +14 +14 0 0.1 Typ. 9 Max. 10.2 Unit V Vrms % dB dB dB dB dB dB dB dB
ELECTRICAL CHARACTERISTICS (refer to the test circuit Tamb = 25C, VS = 9V, RL = 10K, Vin = 1Vrms; RG = 600, all controls flat (G = 0dB), Effect Ctrl = -6dB, MODE = OFF; f = 1KHz unless otherwise specified)
Symbol Parameter Test Condition Min. Typ. Max. Unit
SUPPLY
VS IS SVR Supply Voltage Supply Current Ripple Rejection LCH / RCH out, Mode = OFF 60 7 9 25 80 10.2 V mA dB
INPUT STAGE
R IN V CL ARANGE AVMIN AVMAX ASTEP VDC AVO1 AVO2 Input Resistance Clipping Level Attenuation Range Min. Attenuation Max. Attenuation Step Resolution DC Steps Voice Canceller Output 1 Voice Canceller Output 2 Adjacent att. step LIN = RIN, R IN = ON, Vmix = 0V FIX, 0dB attenuation LIN = RIN = 0V Vmix = 1Vrms FIX, 0dB attenuation -1 31 -1 -3 5 -1 THD = 0.3% 37.5 2 50 2.5 31.5 0 31.5 0.5 0 6 0 1 32 1 3 7 1 62.5 K Vrms dB dB dB dB mV dB dB
3/21
TDA7466
ELECTRICAL CHARACTERISTICS (continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
SUPPLY
AVO3 RLPV Voice Canceller Output 3 Low Pass Filter Resistance LIN = -RIN, Vmix = 0V FIX, 0dB attenuation 5 24 6 32 7 40 dB K
BASS CONTROL
Gb BSTEP RB Control Range Step Resolution Internal Feedback Resistance Max. Boost/cut +12.0 1 33 +14.0 2 44 +16.0 3 55 dB dB K
MIDDLE CONTROL
Gm M STEP RM Control Range Step Resolution Internal Feedback Resistance Max. Boost/cut +12.0 1 18.75 +14.0 2 25 +16.0 3 31.25 dB dB K
TREBLE CONTROL
Gt TSTEP Control Range Step Resolution Max. Boost/cut +13.0 1 +14.0 2 +15.0 3 dB dB
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 GOFF Parameter In-phase Gain (OFF) Test Condition Mode OFF, Input signal of 1kHz, 1.4 Vp-p, Rin Rout L in Lout Mode OFF, Input signal of 1kHz, 1.4 Vp-p R in Rout, Lin Lout Movie mode, Effect Ctrl = -6dB Input signal of 1kHz, 1.4 Vp-p R in Rout, Lin Lout Movie mode, Effect Ctrl = -6dB Input signal of 1kHz, 1.4 Vp-p (Rin Rout) - (Lin Lout) Music mode, Effect Ctrl = -6dB Input signal of 1kHz, 1.4 Vp-p (Rin Rout), (Lin Lout) Music mode, Effect Ctrl = -6dB Input signal of 1kHz, 1.4 Vp-p (Rin Rout) - (Lin Lout) Simulated Mode, Effect Ctrl = -6dB Input signal of 250Hz, 1.4 Vp-p, Rin and Lin Lout Simulated Mode, Effect Ctrl = -6dB Input signal of 1kHz, 1.4 Vp-p, Rin and Lin Lout Simulated Mode, EffectCtrl = 6dB Input signal of 3.6kHz, 1.4 Vp-p, Rin and Lin Lout Min. -1 Typ. 0 Max. 1 Unit dB
D GOFF
LR In-phase Gain Difference (OFF) In-phase Gain (Movie)
-1
0
1
dB
GMOV
8
dB
DGMOV
LR In-phase Gain Difference (Movie) In-phase Gain (Music)
0
dB
GMUS
7
dB
D GMUS
LR In-phase Gain Difference (Music) Simulated L Output 1
0
dB
L MON1
4.5
dB
LMON2
Simulated L Output 2
- 4.0
dB
L MON3
Simulated L Output 3
7.0
dB
4/21
TDA7466
ELECTRICAL CHARACTERISTICS (continued)
Symbol R MON1 Parameter Simulated R Output 1 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 Min. Typ. - 4.5 Max. Unit dB
R MON2
Simulated R Output 2
3.8
dB
R MON3
Simulated R Output 3
- 20
dB
RLP1 R HPI RLPF C RANGE SSTEP
Low Pass Filter Resistance High Pass Filter Resistance LP Pin Impedance
7.5 45 7.5
10 60 10
12.5 75 12.5
K K K
STANDARD SURROUND SOUND EFFECT CONTROL
Control Range Step Resolution - 21 1 -6 dB dB
SURROUND SOUND MATRIX PHASE
R PS10 R PS11 R PS12 R PS13 R PS20 R PS21 R PS22 R PS23 R PS30 R PS31 R PS32 R PS33 R PS40 R PS41 R PS42 R PS43 Phase Shifter 1: D1 = 0, D0 = 0 Phase Shifter 1: D1 = 0, D0 = 1 Phase Phase Phase Phase Phase Phase Phase Phase Phase Phase Phase Phase Phase Phase Shifter Shifter Shifter Shifter Shifter Shifter Shifter Shifter Shifter Shifter Shifter Shifter Shifter Shifter 1: D1 1: D1 2: D3 2: D3 2: D3 2: D3 3: D5 3: D5 3: D5 3: D5 4: D7 4: D7 4: D7 4: D7 = 1, D0 = 1, D0 = 0, D2 = 0, D2 = 1, D2 = 1, D2 = 0, D4 = 0, D4 = 1, D4 = 1, D4 = 0, D6 = 0, D6 = 1, D6 = 1, D6 =0 =1 =0 =1 =0 =1 =0 =1 =0 =1 =0 =1 =0 =1 8.8 10.6 13.4 28 4.2 5.1 6.3 13.7 9 10.9 13.6 29.3 9 10.9 13.6 29.3 11.8 14.1 17.9 37.3 5.6 6.8 8.4 18.3 12.1 14.5 18.1 39.1 12.1 14.5 18.1 39.1 14.8 17.6 22.4 46.6 7 8.5 10.5 22.9 15.1 18.1 22.6 48.9 15.1 18.1 22.6 48.9 K K K K K K K K K K K K K K K K
SRS SURROUND SOUND MATRIX
CENTER Step C SPACE Step S PERSP1 SRS Control Range Center Step Resolution SRS Space Control Range Space Step Resolution Perspective 1 Input Signal of 125Hz SPACE = 0dB, CENTER = MUTE Rin = GND; Lin ROUT Input Signal of 2.15KHz SPACE = 0dB, CENTER = MUTE Rin = GND; Lin ROUT SPACE = MUTE, CENTER =0dB Rin = GND; Lin ROUT -31 1 -31 1 12 0 0 dB dB dB dB dB
PERSP2
Perspective 2
0
dB
L+R
L+ R SRS Curve
-8.5
dB
5/21
TDA7466
ELECTRICAL CHARACTERISTICS (continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
SPEAKER & RECORD ATTENUATORS
Crange SSTEP EA VDC AMUTE R VAR Control Range Step Resolution Attenuation set error DC Steps Output Mute Condition Input Impedance Av = 0 to -20dB Av = -20 to -79dB Adjacent att. steps 0.5 -1.5 -3 -3 70 22.5 79 1 0 0 0 100 30 37.5 1.5 1.5 2 3 dB dB dB dB mV dB K
SPEAKER ATTENUATORS
VTH Zero CrossingThreshold D7 = 0 VS + 20 2 mV
AUDIO OUTPUTS
NO(OFF) NO(MOV) NO(MUS) N O(SIM) NO(SRS) d SC VOCL ROUT VOUT Output Noise (OFF) Output Noise (Movie) Standard Surround Sound Output Noise (Music) Standard Surround Sound Output Noise (Simulated) Standard Surround Sound Output Noise (SRS) Surround Sound Distorsion Channel Separation Clipping Level Output Resistance DC Voltage Level d = 0.3% Output Mute, Flat BW = 20Hz to 20KHz Mode =Movie , BW = 20Hz to 20KHz Mode = Music , BW = 20Hz to 20KHz, Mode = Simulated, BW = 20Hz to 20KHz BW = 20Hz to 20KHz Av = 0 ; Vin = 1Vrms 70 2 10 4 5 30 30 30 50 0.01 90 2.5 30 3.8 50 0.1 Vrms Vrms Vrms Vrms Vrms Vrms % dB Vrms V
BUS INPUTS
V IL VIH IIN VO Input Low Voltage Input High Voltage Input Current Output Voltage SDA Acknowledge IO = 1.6mA 3 -5 +5 0.4 1 V V A V
6/21
TDA7466
I2C BUS INTERFACE Data transmission from microprocessor to the TDA7466 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 ac2 Figure 3: Data Validity on the I CBUS
knowledge bit. The MSB is transferred first. Acknowledge The master (P) 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 P 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.
Figure 4: Timing Diagram of I2CBUS
Figure 5: Acknowledge on the I2CBUS
7/21
TDA7466
SOFTWARE SPECIFICATION Interface Protocol The interface protocol comprises: A start condition (S) A chip address byte, containing the TDA7466 address A subaddress bytes A sequence of data (N byte + achnowledge) A stop condition (P)
CHIP ADDRESS MSB S 1 0 0 0 0 0 A LSB 0 ACK MSB B
SUBADDRESS LSB DATA ACK MSB
DATA 1 to DATA n LSB DATA ACK P
D95AU226A
ACK = Achnowledge S = Start P = Stop A = Address B = Auto Increment
EXAMPLES No Incremental Bus The TDA7466 receives a start condition, the cor-
rect chip address, a subaddress with the MSB = 0 (no incremental bus), N-data (all these data concern the subaddress selected), a stop condition.
CHIP ADDRESS MSB S 1 0 0 0 0 0 A LSB 0 ACK MSB 0 X
SUBADDRESS LSB X X D3 D2 D1 D0 ACK MSB
DATA LSB DATA ACK P
D95AU306
Incremental Bus The TDA7466 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
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.
CHIP ADDRESS MSB S 1 0 0 0 0 0 A LSB 0 ACK MSB 1 X
SUBADDRESS LSB X X D3 D2 D1 D0 ACK MSB
DATA 1 to DATA n LSB DATA ACK P
D95AU307
8/21
TDA7466
DATA BYTES (Address = 80(HEX)): FUNCTION SELECTION: The first byte (subaddress)
MSB D7 B B B B B B B B B B B B D6 X X X X X X X X X X X X D5 X X X X X X X X X X X X D4 X X X X X X X X X X X X D3 0 0 0 0 0 0 0 0 1 1 1 1 D2 0 0 0 0 1 1 1 1 0 0 0 0 D1 0 0 1 1 0 0 1 1 0 0 1 1 LSB D0 0 1 0 1 0 1 0 1 0 1 0 1 INPUT ATTENUATION SURROUND & OUT & EFFECT CONTROL PHASE RESISTOR BASS & NATURAL BASE MIDDLE & TREBLE SPEAKER ATTENUATION "L" SPEAKER ATTENUATION "R" RECORD ATTENUATION "L" RECORD ATTENUATION"R" INPUT MULTIPLEXER, VOICE CANCELLER & REC OUT SRS / SPACE ATTENUATION SRS / CENTER ATTENUATION SUBADDRESS
B = 1 INCREMENTAL BUS; ACTIVE B = 0 NO INCREMENTAL BUS; X = DONT'CARE INPUT ATTENUATION SELECTION
MSB D7 D6 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D5 D4 D3 D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 LSB D0 0 1 0 1 0 1 0 1 INPUT ATTENUATION 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
0 0 0 0 1 1 1 1
0 0 1 1 0 0 1 1
0 1 0 1 0 1 0 1
INPUT ATTENUATION = 0 -31.5dB
9/21
TDA7466
STANDARD SURROUND SELECTION
MSB D7 D6 D5 D4 D3 D2 D1 0 0 1 1 LSB D0 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
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
PHASE RESISTOR SELECTION
MSB D7 D6 D5 D4 D3 D2 D1 0 0 1 1 LSB D0 0 1 0 1 SURROUND PHASE RESISTOR PHASE SHIFT 1 (K) 12 14 18 37 PHASE SHIFT 2 (K) 6 7 8 18 PHASE SHIFT 3 (K) 12 14 18 39 PHASE SHIFT 4 (K) 12 14 18 39
0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1
0 1 0 1
10/21
TDA7466
BASS SELECTION
MSB D7 D6 D5 D4 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 D0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 BASS 2 dB STEPS -14 -12 -10 -8 -6 -4 -2 0 0 2 4 6 8 10 12 14 NATURAL BASE NBRIN, NBRO, NBLIN, NBLO PIN ACTIVE NO NBRIN, NBRO, NBLIN, NBLO PIN
0 1
When external components aren't connected, the data from NATURAL BASE must put "OFF"
11/21
TDA7466
MIDDLE & TREBLE SELECTION
MSB D7 D6 D5 D4 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 D0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 MIDDLE 2 dB STEPS -14 -12 -10 -8 -6 -4 -2 0 0 2 4 6 8 10 12 14 TREBLE 2 dB STEPS 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 0 0 1 1 1 1 0 0 1 1 0 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 -14 -12 -10 -8 -6 -4 -2 0 0 2 4 6 8 10 12 14
12/21
TDA7466
LEFT CHANNEL SPEAKER ATTENUATION SELECTION
MSB D7 D6 D5 D4 D3 D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 LSB D0 0 1 0 1 0 1 0 1 SPEAKER/RECORD ATT 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
0 0 0 0 0 0 0 0 1 1 1 1
0 0 0 0 1 1 1 1 0 0 0 1
0 0 1 1 0 0 1 1 0 0 1 X
0 1 0 1 0 1 0 1 0 1 X X
LEFT & RIGHT CHANNELS BOTH
MSB D7 0 1 D6 D5 D4 D3 D2 D1 LSB D0 ZERO CROSS ATT. MODE 1 dB STEPS ON OFF
X = DON'TCARE SPEAKER/RECORD ATTENUATION = 0dB -79dB
13/21
TDA7466
RECORD AND RIGHT CHANNEL SPEAKER ATTENUATION SELECTION
MSB D7 D6 D5 D4 D3 D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 LSB D0 0 1 0 1 0 1 0 1 SPEAKER/RECORD ATT 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
0 0 0 0 0 0 0 0 1 1 1 1
0 0 0 0 1 1 1 1 0 0 0 1
0 0 1 1 0 0 1 1 0 0 1 X
0 1 0 1 0 1 0 1 0 1 X X
X = DON'T CARE SPEAKER/RECORD ATTENUATION = 0dB -79dB VOICE CANCELLER/INPUT/RECOUT L & R SELECTION
MSB D7 1 1 1 1 1 1 1 1 1 1 0 0 1 1 0 1 0 1 D6 D5 D4 D3 D2 1 1 1 1 1 1 1 1 1 1 D1 1 1 1 1 1 1 1 1 1 1 LSB 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
0 0 1 1
0 1 0 1
14/21
TDA7466
SRS SPACE CONTROL: ATTENUATION SELECTION
MSB D7 D6 D5 D4 D3 D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 LSB D0 0 1 0 1 0 1 0 1 SPACE ATTENUATION 1 dB STEPS 0 -1 -2 -3 -4 -5 -6 -7 8 dB STEPS 0 -8 -16 -24 MUTE
0 0 0 0 1
0 0 1 1 X
0 1 0 1 X X X X
X = DON'T CARE SPEAKER/RECORD ATTENUATION = 0dB -31dB SRS CENTER CONTROL: ATTENUATION SELECTION
MSB D7 D6 D5 D4 D3 D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 LSB D0 0 1 0 1 0 1 0 1 CENTER ATTENUATION 1 dB STEPS 0 -1 -2 -3 -4 -5 -6 -7 8 dB STEPS 0 -8 -16 -24 MUTE SRS INPUT NO SURROUND SIGNAL SURROUND SIGNAL SRS SWITCH SRS ON SRS OFF
0 0 0 0 1 0 1 0 1
0 0 1 1 X
0 1 0 1 X X X X
X = DON'T 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
15/21
TDA7466
POWER ON RESET
SURROUND & OUT CONTROL+ EFFECT CONTROL SPEAKER/RECORD ATTENUATION L &R MODE INPUT ATTENUATION + REAR SWITCH NATURAL BASE VOICE CANCELLER INPUT MIX SWITCH SRS SURROUND BASS & MIDDLE TREBLE OFF + FIX + MAX ATTENUATION MUTE + ZERO CROSS ATT.OFF MAX ATTENUATION + ON OFF OFF IN1 NO MIX PIN OFF + MAX ATTENUATION 2dB 0dB
PIN DESCRIPTION PIN: L-OUT, R-OUT, RECOUT-L, RECOUT-R
VS
PIN: HP1
LP1
10
VS 10K
GND
20A
GND
60K GND
D94AU198
HP2
D96AU477
GND
PIN: HP2
PIN: L-IN, R-IN
VS 20A 5.5K 60K GND
D94AU199
VS 20A
50K
5.5K
HP1
GND
VREF
D94AU200
16/21
TDA7466
PIN: VAR-L, VAR-R, PIN: CREF
VS
20A
VS
20K 42K
20A
SW
30K GND Vref
D95AU227
20K
D95AU336
GND
PIN: LP1
VS 20A
PIN: SCL, SDA
20A
10K GND HP1
D94AU211
GND
D94AU205
PIN: PS1, PS2, PS3, PS4, LP
PIN: NETW2
VS 20A
VS 20A
GND
D95AU308
GND
D96AU473
17/21
TDA7466
PIN: BASSO-L, BASSO-R, NETW1 VS
VS
PIN: BASS-LI,BASS-RI,MIDDLE-LI,MIDDLE-RI,
20A
20A
GND BASS-LO
45K : Bass or 25K : MIDDLE
D95AU231A
GND
D95AU230
BASS-RO,MIDDLE-LO,MIDDLE-RO
PIN: BASS-LO,BASS-RO,MIDDLE-LO, MIDDLE-RO,
PIN: TREBLE-L, TREBLE-R
VS
VS
20A
20A
(*) GND BASS-LI,BASS-RI,MIDDLE-LI,MIDDLE-RI (*) 45K : Bass 25K : MIDDLE
D95AU309 D95AU232
25K
GND
PIN: VOUT REF
VS
PIN: NBLIN, NBRIN
VS
20A
20A
GND
D95AU233A
10K GND
GND
D95AU234
SW
18/21
TDA7466
PIN: NBLO, NBRO VS
VREF
GND
D95AU235A
19/21
TDA7466
SDIP42 PACKAGE MECHANICAL DATA
DIM. MIN. A A1 A2 B B1 c D E E1 e e1 e2 e3 L 2.54 3.30 0.51 3.05 0.38 0.89 0.23 36.58 15.24 12.70 13.72 1.778 15.24 18.54 1.52 3.56 0.10 0.130 3.81 0.46 1.02 0.25 36.83 4.57 0.56 1.14 0.38 37.08 16.00 14.48 mm TYP. MAX. 5.08 0.020 0.120 0.0149 0.035 0.0090 1.440 0.60 0.50 0.540 0.070 0.60 0.730 0.060 0.140 0.150 0.0181 0.040 0.0098 1.450 0.180 0.0220 0.045 0.0150 1.460 0.629 0.570 MIN. inch TYP. MAX. 0.20
E E1
A1
A2
B
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.015 0,38 Gage Plane
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20/21
TDA7466
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. (c) 1997 SGS-THOMSON Microelectronics - Printed in Italy - All Rights Reserved The Sound Retrieval System and are registered trademarks of SRS Labs, Inc.
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