7464 Fast Delivery |IC PHOENIX CO.,LIMITED

7464 ,DIGITALLY CONTROLLED AUDIO PROCESSOR WITH SRS SURROUND SOUND AND VOICE CANCELLERTDA7464DIGITALLY CONTROLLED AUDIO PROCESSOR WITHSRS SURROUND SOUND AND VOICE CANCELLERThe Device in ..
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7464
DIGITALLY CONTROLLED AUDIO PROCESSOR WITH SRS SURROUND SOUND AND VOICE CANCELLER
TDA7464
DIGITALLY CONTROLLED AUDIO PROCESSOR WITH
SRS SURROUND SOUND AND VOICE CANCELLER STEREO INPUTS
INPUT ATTENUATION CONTROLIN 0.5dB
STEP
TREBLE MIDDLE AND BASS CONTROL
VOICE CANCELLERIS AVAILABLE
STEREO SRS SURROUND SOUND WITH
CENTER& SPACE CONTROLIS AVAILABLE
THREE STANDARD SURROUND MODES
ARE AVAILABLE: MUSICIN4 DIFFERENT SELECTABLE
RESPONSES MOVIE AND SIMULATEDIN 256
DIFFERENTSELECTABLE RESPONSES SPEAKERS OUTPUTS INDEPENDENT ATTENUATORSIN 1dB
STEP FOR BALANCEFACILITY ZEROCROSSINGATTENUATIONAVAILABLE INDEPENDENT MUTE FUNCTION RECORD OUTPUTS INDEPENDENT ATTENUATORSIN 1dB
STEP FOR BALANCEFACILITY MUXAVAILABLE FORPROCESSES SIGNAL
SELECTION INDEPENDENT MUTE FUNCTION
ALL FUNCTIONS PROGRAMMABLE VIA SE-
RIAL BUS
DESCRIPTION
The TDA7464isa volume tone (bass middle and
treble) balance (Left/Right) processorswith stereo
SRS and voice cancellerfor quality audio applica-
tionsincar radio, Hi-Fi,TV systems. reproduces SRS (Sound Retrieval System)
soundby external components and surround
soundby using phase shifters anda signal ma-
trix. TheAC signal settingis obtainedby resistor
networks and switches combined with operational
amplifiers accordingto the SRS laboratories
specification. Controlofallthe functionsis ac-
complishedby serial bus.
Thankstothe used BIPOLAR/CMOSTechnology,
Low Distortion, Low Noise andDC steppingare
obtained.
February 1998
ORDERING NUMBER: TDA7464
TQFP4419202122434241 3940 3837363534
VAR_L
NETW2
NETW1
HP1
LP1
HP2
BASS_LI
BASS_LO
BASSO_R
BASSO_L
VAR_R
BASS_RO
BASS_RI
MIDDLE_LO
MIDDLE_LI
MIDDLE_RI
MIDDLE_RO
TREBLE_R
TREBLE_L
AGND
SDA
SCLPS1PS2PS3 V
PS4 CREFR_IN4R_IN3R_IN2LPVC
L_IN4
RECOUT_L
RECOUT_R
R_OUT
DIG_GND
L_OUT
R_IN1
L_IN1
L_IN2
L_IN3
VREFOUT
D96AU483C13141516
PIN CONNECTION
The Device incorporatestheSRS
(Sound Retrieval System) under
licencefromSRS Labs,Inc.
1/21
L-IN1
RLP1
L-R
SUPPLY
AGND
CREF
TREBLE
18nF
MIDDLE
2.7K
MIDDLE-LI
MIDDLE-LO
22nF
BASS
BASS-LI
MUTE
D96AU481D
MUTE
I2C
BUS
DECODER
LATCHES
SPKR
ATT
REC
ATT
TREBLE
MIDDLE
BASS
18nF
22nF
2.7K
5.6nF
MUTE
SPKR
ATT
MUTE
REC
ATT
SCLSDADIG_GND R-OUT RECOUT-RL-OUTRECOUT-L+
RHP1
LP1
HP1
HP2
5.6nF
680nF
PS1
90Hz
100nF
PS1
RPS1
SIMMOVIE/ MUSIC
MUSIC
PS2
4KHz
PS3
400Hz
PS4
400Hz
4.7nF
PS2
RPS2
22nF
PS3
RPS3
22nF
PS4
RPS4
MOVIE/
SIM
MIXING
AMP
LPF
9KHz
EFFECT
CONTROL
MIXING
AMP
1.2nF
MIDDLE-RI
MIDDLE-RO 222123 24 26-
LPF
100nF
LPVC
TREBLE-R
79dB
CONTROL
5.6nF
TREBLE-L
100nF
5.6K
100nF
BASS-LO
100nF
100nF
5.6K
BASS-RI
BASS-RO
79dB
CONTROL
79dB
CONTROL
BASSO-R
VAR-R
30K- +-
BASSO-L
VAR-L
30K
79dB
CONTROL
31.5dB control
R-IN4
31.5dB
control
NETW1
NETW2
VOICE
SURR
SRS
SURRREAR
FIX
3BAND
SURRREAR
FIX
3BAND
FIX
VAR
FIX
VAR
50K 50K
STEREO
SRS
CENTER
SPACE
4.42K
1.5K
32.4K
130K
47.5K
4.7nF
3.74K
VREFOUT
VREF
OFF
FIX
SURR
SRS
FIX
100K
MIX
MIX
N.B.
N.B.
L-IN2
50K
L-IN3
50K
L-IN4
50K
R-IN3
50K
R-IN2
50K
R-IN1
50K
BLOCK DIAGRAM
TDA7464
2/21
THERMAL DATA
Symbol Description Value Unit
Rthj-pins Thermal Resistance Junction-pins Max. 85 °C/W
QUICK REFERENCE DATA
Symbol Parameter Min. Typ. Max. Unit Supply Voltage 7 9 10.2 V
VCL Max. input signal handling 2 Vrms
THD Total Harmonic DistortionV= 1Vrmsf= 1KHz 0.01 0.1 %
S/N Signalto Noise RatioVout= 1Vrms (mode= OFF) 106 dB Channel Separationf= 1KHz 90 dB
Input Attenuation Control (0.5dB) -31.5 0 dB
Treble Control (2db step) -14 +14 dB
Middle Control (2db step) -14 +14 dB
Bass Control (2dB step) -14 +14 dB
Balance Control 1dB step (LCH, RCH) -79 0 dB
Mute Attenuation 100 dB
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit Operating Supply Voltage 11 V
Tamb Operating Ambient Temperature -10to85 °C
Tstg Storage Temperature Range -55to +150 °C
ELECTRICAL CHARACTERISTICS (refertothetest circuit Tamb =25°C,VS=9V,RL= 10KΩ,
Vin= 1Vrms;RG= 600Ω,all controlsflat(G= 0dB), EffectCtrl= -6dB, MODE= OFF;f= 1KHz
unless otherwise specified)
Symbol Parameter Test Condition Min. Typ. Max. Unit
SUPPLY Supply Voltage 7 9 10.2 V Supply Current 25 mA
SVR Ripple Rejection LCH /RCHout, Mode= OFF 60 80 dB
INPUT STAGE
RIN Input Resistance 37.5 50 62.5 KΩ
VCL Clipping Level THD= 0.3% 2 2.5 Vrms
ARANGE Attenuation Range 31.5 dB
AVMIN Min. Attenuation -1 0 1 dB
AVMAX Max. Attenuation 31 31.5 32 dB
ASTEP Step Resolution -1 0.5 1 dB
VDC DC Steps Adjacentatt. step -3 0 3 mV
AVO1 Voice Canceller Output1 LIN =RIN,RIN=ON,
Vmix=0VFIX,0dB attenuation 7 dB
AVO2 Voice Canceller Output2 LIN =RIN =0VVmix =1VrmsFIX,
0dB attenuation 0 1 dB
TDA7464
3/21
ELECTRICAL CHARACTERISTICS (continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
SUPPLY
AVO3 Voice Canceller Output3 LIN =-RIN,Vmix=0VFIX,
0dB attenuation 7 dB
RLPV Low Pass Filter Resistance 24 32 40 KΩ
BASS CONTROL Control Range Max. Boost/cut +12.0 +14.0 +16.0 dB
BSTEP Step Resolution 1 2 3 dB Internal Feedback Resistance 33 44 55 KΩ
MIDDLE CONTROL Control Range Max. Boost/cut +12.0 +14.0 +16.0 dB
MSTEP Step Resolution 1 2 3 dB Internal Feedback Resistance 18.75 25 31.25 KΩ
TREBLE CONTROL Control Range Max. Boost/cut +13.0 +14.0 +15.0 dB
TSTEP Step Resolution 1 2 3 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 Parameter Test Condition Min. Typ. Max. Unit
GOFF In-phase Gain (OFF) Mode OFF, Input signalof
1kHz,1.4 Vp-p,Rin→Rout
Lin→Lout 0 1 dB
DGOFF LR In-phase Gain Difference
(OFF)
Mode OFF, Input signalof
1kHz,1.4Vp-p
Rin→ Rout,Lin→Lout 0 1 dB
GMOV In-phase Gain (Movie) Moviemode, EffectCtrl= -6dB
Input signalof 1kHz,1.4Vp-p
Rin→ Rout,Lin→Lout
8dB
DGMOV LR In-phase Gain Difference
(Movie)
Moviemode, EffectCtrl= -6dB
Input signalof 1kHz,1.4Vp-p
(Rin→ Rout)–(Lin→ Lout)
0dB
GMUS In-phase Gain (Music) Music mode, EffectCtrl= -6dB
Input signalof 1kHz,1.4Vp-p
(Rin→ Rout),(Lin→ Lout)
7dB
DGMUS LR In-phase Gain Difference
(Music)
Music mode, EffectCtrl= -6dB
Input signalof 1kHz,1.4Vp-p
(Rin→ Rout)-(Lin→ Lout)
0dB
LMON1 SimulatedL Output1 Simulated Mode, EffectCtrl= -6dB
Input signalof 250Hz,
1.4 Vp-p,RinandLin→Lout
4.5 dB
LMON2 SimulatedL Output2 Simulated Mode, EffectCtrl= -6dB
Input signalof 1kHz,
1.4 Vp-p,RinandLin→Lout4.0 dB
LMON3 SimulatedL Output3 Simulated Mode, EffectCtrl=-6dB
Input signalof 3.6kHz,
1.4 Vp-p,RinandLin→Lout
7.0 dB
TDA7464
4/21
ELECTRICAL CHARACTERISTICS (continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
RMON1 SimulatedR Output1 Simulated Mode, EffectCtrl= -6dB
Input signalof 250Hz,
1.4 Vp-p,RinandLin →Rout4.5 dB
RMON2 SimulatedR Output2 Simulated Mode, EffectCtrl= -6dB
Input signalof 1kHz,
1.4 Vp-p,RinandLin →Rout
3.8 dB
RMON3 SimulatedR Output3 Simulated Mode, EffectCtrl= -6dB
Input signalof 3.6kHz,
1.4 Vp-p,RinandLin→Rout
–20 dB
RLP1 Low Pass Filter Resistance 7.5 10 12.5 KΩ
RHPI High Pass Filter Resistance 45 60 75 KΩ
RLPF LPPin Impedance 7.5 10 12.5 KΩ
STANDARD SURROUND SOUND EFFECT CONTROL
CRANGE Control Range -21 -6 dB
SSTEP Step Resolution 1 dB
SURROUND SOUND MATRIX PHASE
RPS10 Phase Shifter1:D1=0,D0=0 8.8 11.8 14.8 KΩ
RPS11 Phase Shifter1:D1=0,D0=1 10.6 14.1 17.6 KΩ
RPS12 Phase Shifter1:D1=1,D0=0 13.4 17.9 22.4 KΩ
RPS13 Phase Shifter1:D1=1,D0=1 28 37.3 46.6 KΩ
RPS20 Phase Shifter2:D3=0,D2=0 4.2 5.6 7 KΩ
RPS21 Phase Shifter2:D3=0,D2=1 5.1 6.8 8.5 KΩ
RPS22 Phase Shifter2:D3=1,D2=0 6.3 8.4 10.5 KΩ
RPS23 Phase Shifter2:D3=1,D2=1 13.7 18.3 22.9 KΩ
RPS30 Phase Shifter3:D5=0,D4=0 9 12.1 15.1 KΩ
RPS31 Phase Shifter3:D5=0,D4=1 10.9 14.5 18.1 KΩ
RPS32 Phase Shifter3:D5=1,D4=0 13.6 18.1 22.6 KΩ
RPS33 Phase Shifter3:D5=1,D4=1 29.3 39.1 48.9 KΩ
RPS40 Phase Shifter4:D7=0,D6=0 9 12.1 15.1 KΩ
RPS41 Phase Shifter4:D7=0,D6=1 10.9 14.5 18.1 KΩ
RPS42 Phase Shifter4:D7=1,D6=0 13.6 18.1 22.6 KΩ
RPS43 Phase Shifter4:D7=1,D6=1 29.3 39.1 48.9 KΩ
SRS SURROUND SOUND MATRIX
CENTER SRS Control Range -31 0 dB
StepC Center Step Resolution 1 dB
SPACE SRS Space Control Range -31 0 dB
StepS Space Step Resolution 1 dB
PERSP1 Perspective1 Input Signalof 125Hz
SPACE= 0dB, CENTER =MUTE
Rin= GND;Lin→ ROUT dB
PERSP2 Perspective2 Input Signalof 2.15KHz
SPACE= 0dB, CENTER =MUTE
Rin= GND;Lin→ ROUT
0dB
L+R L+R SRS Curve SPACE= MUTE, CENTER=0dB
Rin= GND;Lin→ ROUT
-8.5 dBR L,R SRS Curve SPACE= MUTE,
CENTER= MUTE
Rin= GND;Lin→ LOUT
Lin= GND;Rin→ ROUT
-13.4 dB
TDA7464
5/21
ELECTRICAL CHARACTERISTICS (continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
SPEAKER& RECORD ATTENUATORS
Crange Control Range 79 dB
SSTEP Step Resolution 0.5 1 1.5 dB Attenuationset error Av=0to -20dB -1.5 0 1.5 dB=-20to -79dB -3 0 2 dB
VDC DC Steps Adjacentatt. steps -3 0 3 mV
AMUTE Output Mute Condition 70 100 dB
RVAR Input Impedance 22.5 30 37.5 KΩ
SPEAKER ATTENUATORS
VTH Zero CrossingThreshold D7=0 VS+20
AUDIO OUTPUTS
NO(OFF) Output Noise (OFF) Output Mute,Flat= 20Hzto 20KHz
μVrms
μVrms
NO(MOV) Output Noise (Movie) Standard
Surround Sound
Mode= Movie,= 20Hzto 20KHz μVrms
NO(MUS) Output Noise (Music) Standard
Surround Sound
Mode= Music,= 20Hzto 20KHz,
NO(SIM) Output Noise (Simulated)
Standard Surround Sound
Mode= Simulated,= 20Hzto 20KHz μVrms
NO(SRS) Output Noise (SRS)
Surround Sound= 20Hzto 20KHz 50 μVrms Distorsion Av=0;Vin= 1Vrms 0.01 0.1 % Channel Separation 70 90 dB
VOCL Clipping Level d= 0.3% 2 2.5 Vrms
ROUT Output Resistance 10 30 50 Ω
VOUT DC Voltage Level 3.8 V
BUS INPUTS
VIL InputLow Voltage 1V
VIH Input High Voltage 3 V
IIN Input Current -5 +5 μA Output Voltage SDA
Acknowledge= 1.6mA 0.4 V
μVrms
TDA7464
6/21
2C BUS INTERFACEData transmission from microprocessorto the
TDA7464 and viceversa takes place throughthe wiresI2C BUS interface, consistingofthe two
lines SDA and SCL (pull-up resistorsto positive
supply voltage mustbe connected).
Data Validity showninfig.3,the dataonthe SDAline must stable duringthe high periodofthe clock. The
HIGH and LOW stateof the data line can only
change whenthe clock signalonthe SCL lineis
LOW.
Start and Stop Conditions shownin fig.4a start conditionisa HIGHto
LOW transitionof the SDA line while SCLis
HIGH. The stop conditionisa LOWto HIGH tran-
sitionofthe SDAline while SCLis HIGH.
Byte Format
Every byte transferredonthe SDA line must con-
tain8 bits. Each byte mustbe followedbyanac-
knowledgebit. The MSBis transferred first.
Acknowledge
The master (μP) putsa resistive HIGH levelonthe
SDAline duringthe acknowledge clock pulse (see
fig.5). The peripheral (audioprocessor) that ac-
knowledges hasto pull-down (LOW)the SDA line
during thisclock pulse.
The audioprocessor which has been addressed
hasto generatean acknowledge afterthe recep-
tionof each byte, otherwisethe SDAline remains the HIGH level during the ninth clock pulse
time.In this casethe master transmitter can gen-
eratethe STOP informationin orderto abortthe
transfer.
Transmission without Acknowledge
Avoidingto detectthe acknowledgeofthe audio-
processor,theμP can usea simpler transmission:
simplyit waits one clock without checking the
slave acknowledging, and sendsthe new data.
This approachof courseis less protected from
misworking.
Figure3: Data Validityon theI2 CBUS
Figure4: Timing DiagramofI2 CBUS
Figure5: AcknowledgeontheI2 CBUS
TDA7464
7/21
SOFTWARE SPECIFICATION
InterfaceProtocol
The interface protocol comprises: start condition(S) chip address byte, containingthe TDA7464
address subaddress bytes sequenceof data(N byte+ achnowledge) stop condition(P)
ACK= Achnowledge= Start= Stop= Address= Auto Increment 100000A0 ACK ACK DATA ACKP
MSB LSB MSB LSB MSB LSB
CHIP ADDRESS
D95AU226A DATA
SUBADDRESS DATA1to DATAn
EXAMPLES Incremental Bus
The TDA7464 receivesa start condition,the cor-
rect chip address,a subaddress withthe MSB=0
(no incremental bus), N-data(all these data con-
cernthe subaddressselected),a stop condition. 100000A0 ACK ACK DATA ACKP
MSB LSB MSB LSB MSB LSB
CHIP ADDRESS
D95AU306
0D3
SUBADDRESS DATAXX D2D1D0
Incremental Bus
The TDA7464 receivesa start condition,the cor-
rect chip address,a subaddresswiththe MSB=1
(incremental bus): nowitisina loop condition
withan autoincreaseofthe subaddress whereas
SUBADDRESS from ”1XXX1010”to ”1XXX1111” DATAare ignored.
The DATA1 concerns thesubaddress sent, and
the DATA2 concernsthe subaddress sent plus
oneinthe loop etc. and,atthe end,it receivesthe
stop condition. 100000A0 ACK ACK DATA ACKP
MSB LSB MSB LSB MSB LSB
CHIP ADDRESS
D95AU307
1D3
SUBADDRESS DATA1to DATAnXX D2D1D0
TDA7464
8/21
MSB LSB INPUT ATTENUATION D6 D5 D4 D3 D2 D1 D0 0.5dB STEPS 000 0 0 0 1 -0.5 010 -1 0 1 1 -1.5 100 -2 1 0 1 -2.5 110 -3 1 1 1 -3.5dB STEPS
1000 0
1001 -4
1010 -8
1011 -12
1100 -16
1101 -20
1110 -24
1111 -28
INPUT ATTENUATION=0∼ -31.5dB
INPUT ATTENUATION SELECTION
MSB LSB SUBADDRESS D6 D5 D4 D3 D2 D1 D0 X X X 0 0 0 0 INPUT ATTENUATION X X X 0 0 0 1 SURROUND& OUT& EFFECT
CONTROL X X X 0 0 1 0 PHASE RESISTOR X X X 0 0 1 1 BASS X X X 0 1 0 0 MIDDLE& TREBLE X X X 0 1 0 1 SPEAKERATTENUATION”L” X X X 0 1 1 0 SPEAKERATTENUATION”R” X X X 0 1 1 1 RECORD ATTENUATION”L” X X X 1 0 0 0 RECORD ATTENUATION”R” X X X 1 0 0 1 INPUT MULTIPLEXER, VOICE
CANCELLER& REC OUT X X X 1 0 1 0 SRS/ SPACE ATTENUATION X X X 1 0 1 1 SRS/ CENTER ATTENUATION=1 INCREMENTAL BUS; ACTIVE=0 NO INCREMENTAL BUS;= DON’T CARE
The first byte (subaddress)
DATA BYTES (Address= 80(HEX)):
FUNCTION SELECTION:
TDA7464
9/21
MSB LSB D6 D5 D4 D3 D2 D1 D0 SURROUND MODE 0 SIMULATED 1 MUSIC 0 OFF 1 MOVIE
OUT VAR FIX
EFFECT CONTROL
0000 -6
0001 -7
0010 -8
0011 -9
0100 -10
0101 -11
0110 -12
0111 -13
1000 -14
1001 -15
1010 -16
1011 -17
1100 -18
1101 -19
1110 -20
1111 -21
PHASE RESISTOR SELECTION
MSB LSB SURROUND PHASE
RESISTOR D6 D5 D4 D3 D2 D1 D0 PHASE SHIFT1 (KΩ) 12 14 18 37
PHASE SHIFT2 (KΩ) 6 7 8 18
PHASE SHIFT3 (KΩ) 12 14 18 39
PHASE SHIFT4 (KΩ) 12 14 18 39
STANDARD SURROUND SELECTION
TDA7464
10/21
BASS SELECTION
MSB LSB BASS D6 D5 D4 D3 D2 D1 D0 2dB STEPS 000 -14 001 -12 010 -10 011 -8 100 -6 101 -4 110 -2 111 0 111 0 110 2 101 4 100 6 011 8 010 10 001 12 000 14
TDA7464
11/21

Partno	Mfg	Dc	Qty	Available	Descript
7464	CALEX	N/a	5	avai	DIGITALLY CONTROLLED AUDIO PROCESSOR WITH SRS SURROUND SOUND AND VOICE CANCELLER