SGS Thomson Microelectronics TDA7465 Datasheet
DIGITALLYCONTROLLEDAUDIO PROCESSOR WITH
SRS SURROUND SOUND AND VOICE CANCELLER
The Device incorporates the SRS
(Sound Retrieval System) under
licencefromSRS Labs, Inc.
1 STEREOINPUTAND 1 MIXER INPUT
INPUT ATTENUATION CONTROL IN 0.5dB
STEP
TREBLEMIDDLE AND BASS CONTROL
VOICECANCELLERIS AVAILABLE
STEREO SRS SURROUND SOUND WITH
CENTER& SPACECONTROL IS AVAILABLE
THREE STANDARD SURROUND MODES
ARE AVAILABLE:
- MUSICIN 4 DIFFERENTSELECTABLE
RESPONSES
- MOVIE ANDSIMULATED IN 256
DIFFERENTSELECTABLE RESPONSES
REAR OUTPUT IS AVAILABLE TO DRIVE
EXTRA SURROUNDSPEAKERS
2 SPEAKERSOUTPUTS
- INDEPENDENTATTENUATORS IN 1dB
STEPFOR BALANCEFACILITY
- ZEROCROSSINGATTENUAT IONAVAILABLE
- INDEPENDENTMUTE FUNCTION
2 RECORD OUTPUTS
- INDEPENDENTATTENUATORS IN 1dB
STEPFOR BALANCEFACILITY
- MUXAVAILABLE FORPROCESSESSIGN AL
SELECTIO N
- INDEPENDENTMUTE FUNCTION
ALL FUNCTIONS PROGRAMMABLE VIA SERIAL BUS
ADDRESSPIN AVAILABLE
DESCRIPTION
The TDA7465 is a volume tone (bass middle and
treble) balance (Left/Right) processorswith stereo
SRS and voicecanceller 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
TDA7465
SDIP42
ORDERING NUMBER: TDA7465
PIN CONNECTION
1
V
S
2
PS4
3
PS3
4
PS2
5
PS1 R_IN
6
LP
7
LP1
8
HP1
9
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
10
11
12
13
14
15
16
17
18
19
20
21
D96AU479B
connectmicrophone for KARAOKEfeature.
Control of all the functions is accomplishedby serial bus.
Thanks to the used BIPOLAR/CMOSTechnology,
Low Distortion, Low Noise and DC stepping are
obtained.
42
41
40
39
38
37
36
35
34
33
32
31
30
29
27
26
25
24
23
22
CREF
REAR_OUT
REAR_IN
LPVC
VREFOUT
L_IN
MIX
NETW2
NETW1
RECOUT_L
RECOUT_R
L_OUT
R_OUT
DIG_GND28
SCL
SDA
ADDR
AGND
TREBLE_L
TREBLE_R
May 1997
1/20
TDA7465
BLOCK DIAGRAM
2.7K
4.7µF
SCL
SDA
3BAND
BASS
MIDDLE
TREBLE
MIXING
AMP
272628
DIG_GND
25
C BUSDECODER + LATCHES
2
I
ADDR
AMP
MIXING
79dB CONTROL
REC
79dB CONTROL
SURR
FIX
ATT
SPKR
-
SRS
L-OUT
30
ATT
MUTE
+
FIX
VAR
MUTE
REAR
SURR
RECOUT-L
32
N.B.SW
30K
2.2µF
BASSO-L VAR-L
FIX
BASS-LO
100nF
14 11 10
RB
BASS-LI
5.6K
100nF
MIDDLE-LO
22nF
2.7K
18nF
5.6nF
22nF
MIDDLE-LI
19 18 15
23
TREBLE-L
PS4
RM
RPS4
PS4
400Hz
79dB CONTROL
FIX
FIX
TREBLE MIDDLE BASS
SPKR
SURR
2.7K
4.7µF
R-OUT
RECOUT-R
29
31
ATT
MUTE
-
+
VAR
ATT
REC
3BAND
REAR
SURR
FIX
SRS
MUTE
D96AU480C
N.B.SW
30K
1213162239
2.2µF
BASSO-R VAR-R
79dB CONTROL
BASS-RO
5.6K
BASS-RI
100nF 100nF
MIDDLE-RO
RM RB
21 20 17
50K
41 40
18nF 22nF
MIDDLE-RI
TREBLE-R
REAR_IN
2.2µF
REAR_OUT
2.7K
5.6nF
4.7nF
3.74K
47.5K
2/20
22nF
4.7nF
100nF
5.6nF 680nF
130K
CENTER SPACE
NETW2NETW1
SRS
STEREO
33 34
1K
0.47µF
LP
1.2nF
100K
1µF
35
MIX
37
12442 6
S
V
LPVC
CREF
AGND
VREFOUT
22µF
100nF
REF
V
SUPPLY
31.5dB
control
50K
R-IN
1.5K 32.4K
4.42K
0.47µF
RHP1
RLP1
PS3
PS2
PS1
400Hz
4KHz
90Hz
MOVIE/
MUSIC
R5
SIM
OFF
EFFECT
CONTROL
LPF
9KHz
MUSIC
SIM
MOVIE/
L-R
-
-
+
+
R6
-
+
+
+
MIX SW
+
ON
VOICE
+LPF
-
38
0.22µF
PS3
RPS3
PS2
RPS2
PS1
RPS1
MIX SW
+
789 5 4 3 2
LP1 HP1 HP2
31.5dB control
50K
36
L-IN
0.22µF
TDA7465
THERMAL DATA
Symbol Description Value Unit
R
thj-pins
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
T
amb
T
QUICK REFERENCE DATA
Symbol Parameter Min. Typ. Max. Unit
V
V
THD Total Harmonic Distortion V = 1Vrms f= 1KHz 0.01 0.1 %
S/N Signal to Noise Ratio V
S
Thermal Resistance Junction-pins Max. 85 °C/W
Operating Supply Voltage 11 V
S
Operating Ambient Temperature -10to 85 °C
Storage Temperature Range -55 to +150 °C
stg
Supply Voltage 7 9 10.2 V
S
CL
Max. input signal handling 2 Vrms
= 1Vrms (mode = OFF) 106 dB
out
Channel Separation f = 1KHz 90 dB
C
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 (L
) -79 0 dB
CH,RCH
Mute Attenuation 100 dB
ELECTRICALCHARACTERISTICS (referto the test circuit T
= 1Vrms;RG= 600Ω, allcontrols flat (G = 0dB),Effect Ctrl = -6dB,MODE = OFF; f = 1KHz
V
in
=25°C, VS= 9V,RL= 10KΩ,
amb
unless otherwise specified)
Symbol Parameter Test Condition Min. Typ. Max. Unit
SUPPLY
V
S
I
S
SVR Ripple Rejection L
Supply Voltage 7 9 10.2 V
Supply Current 25 mA
CH /RCH out, Mode = OFF 60 80 dB
INPUTSTAGE
R
IN
V
CL
A
RANGE
A
VMIN
A
VMAX
A
STEP
V
DC
A
VO1
A
VO2
Input Resistance 37.5 50 62.5 KΩ
Clipping Level THD = 0.3% 2 2.5 Vrms
Attenuation Range 31.5 dB
Min. Attenuation -1 0 1 dB
Max. Attenuation 31 31.5 32 dB
Step Resolution -1 0.5 1 dB
DC Steps Adjacent att. step -3 0 3 mV
Voice Canceller Output 1 LIN=RIN,RIN=ON,
V
= 0V FIX, 0dB attenuation
mix
Voice Canceller Output 2 LIN=RIN=0VV
mix
=1V
rms
FIX,
567dB
-1 0 1 dB
0dB attenuation
3/20
TDA7465
ELECTRICALCHARACTERISTICS (continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
SUPPLY
A
VO3
Voice Canceller Output 3 LIN=-RIN,V
= 0V FIX,
mix
567dB
0dB attenuation
R
LPV
R
MIX
Low Pass Filter Resistance 24 32 40 KΩ
Input Impedance 75 100 125 KΩ
BASSCONTROL
Gb Control Range Max. Boost/cut +12.0 +14.0 +16.0 dB
B
STEP
R
B
Step Resolution 1 2 3 dB
Internal Feedback Resistance 33 44 55 K
MIDDLE CONTROL
Gm Control Range Max. Boost/cut +12.0 +14.0 +16.0 dB
M
STEP
R
M
Step Resolution 1 2 3 dB
Internal Feedback Resistance 18.75 25 31.25 KΩ
TREBLECONTROL
Gt Control Range Max. Boost/cut +13.0 +14.0 +15.0 dB
T
STEP
Step Resolution 1 2 3 dB
STANDARDSURROUND SOUND MATRIX
TEST CONDITION (PhaseResistor SelectionD0=0, D1=1,D2=0.D3=1, D4=0, D5=1, D6=0, D7=1
Symbol Parameter Test Condition Min. Typ. Max. Unit
G
D
OFF
GOFF
In-phase Gain (OFF) Mode OFF, Input signal of
LR In-phase Gain Difference
(OFF)
G
MOV
D
GMOV
In-phase Gain (Movie) Movie mode, Effect Ctrl = -6dB
LR In-phase Gain Difference
(Movie)
G
MUS
D
GMUS
In-phase Gain (Music) Music mode, Effect Ctrl = -6dB
LR In-phase Gain Difference
(Music)
L
MON1
L
MON2
L
MON3
Simulated L Output 1 SimulatedMode, EffectCtrl = -6dB
Simulated L Output 2 SimulatedMode, EffectCtrl = -6dB
Simulated L Output 3 SimulatedMode, EffectCtrl= -
1kHz, 1.4 V
Lin→ L
out
p-p,Rin
→
R
out
Mode OFF, Input signal of
1kHz, 1.4 V
R
→
in
Input signal of 1kHz, 1.4 V
R
→
in
R
out,Lin
R
out,Lin
p-p
→
→
L
out
L
p-p
out
Movie mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 V
(Rin→ R
)–(Lin→ L
out
Input signal of 1kHz, 1.4 V
(Rin→ R
), (Lin→ L
out
out
out
p-p
)
p-p
)
Music mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 V
(Rin→ R
)-(Lin→ L
out
out
p-p
)
Input signal of 250Hz,
1.4 V
p-p,Rin
and L
L
→
in
out
Input signal of 1kHz,
1.4 V
p-p,Rin
and Lin→ L
out
6dB
Input signal of 3.6kHz,
1.4 V
p-p,Rin
and Lin→ L
out
-1 0 1 dB
-1 0 1 dB
8dB
0dB
7dB
0dB
4.5 dB
– 4.0 dB
7.0 dB
Ω
4/20
TDA7465
ELECTRICALCHARACTERISTICS (continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
R
MON1
R
MON2
R
MON3
R
LP1
R
HPI
R
LPF
R
REARIN
R
REAROUT
V
OUT
STANDARDSURROUND SOUNDEFFECTCONTROL
C
RANGE
S
STEP
SURROUND SOUNDMATRIX 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
Simulated R Output 1 SimulatedMode,EffectCtrl= -6dB
– 4.5 dB
Input signal of 250Hz,
1.4 V
Simulated R Output 2 SimulatedMode,EffectCtrl= -6dB
p-p,Rin
and Lin→R
out
3.8 dB
Input signal of 1kHz,
1.4 V
p-p,Rin
and L
Simulated R Output 3 SimulatedMode,EffectCtrl= -6dB
R
→
in
out
–20 dB
Input signal of 3.6kHz,
1.4 V
p-p,Rin
and L
R
→
in
out
Low Pass Filter Resistance 7.5 10 12.5 KΩ
High Pass Filter Resistance 45 60 75 K
LP Pin Impedance 7.5 10 12.5 KΩ
Rear Input Resistance D6 = 0 37.5 50 62.5 KΩ
Rear Output Resistance D6 = 0 10 30 50 Ω
DC Rear Voltage Level D6 = 0 4.5 V
Control Range - 21 - 6 dB
Step Resolution 1 dB
Phase Shifter 1:D1 = 0, D0 =0 8.8 11.8 14.8 KΩ
Phase Shifter 1:D1 = 0, D0 =1 10.6 14.1 17.6 K
Phase Shifter 1:D1 = 1, D0 =0 13.4 17.9 22.4 KΩ
Phase Shifter 1:D1 = 1, D0 =1 28 37.3 46.6 K
Phase Shifter 2:D3 = 0, D2 =0 4.2 5.6 7 KΩ
Phase Shifter 2:D3 = 0, D2 =1 5.1 6.8 8.5 K
Phase Shifter 2:D3 = 1, D2 =0 6.3 8.4 10.5 KΩ
Phase Shifter 2:D3 = 1, D2 =1 13.7 18.3 22.9 KΩ
Phase Shifter 3:D5 = 0, D4 =0 9 12.1 15.1 KΩ
Phase Shifter 3:D5 = 0, D4 =1 10.9 14.5 18.1 KΩ
Phase Shifter 3:D5 = 1, D4 =0 13.6 18.1 22.6 K
Phase Shifter 3:D5 = 1, D4 =1 29.3 39.1 48.9 KΩ
Phase Shifter 4:D7 = 0, D6 =0 9 12.1 15.1 K
Ω
Ω
Ω
Ω
Ω
Ω
SRS SURROUND SOUND MATRIX
CENTER SRS Control Range -31 0 dB
Step
SPACE SRS Space Control Range -31 0 dB
Step
P
ERSP1
P
ERSP2
L+R L+ R SRS Curve SPACE= MUTE,CENTER=0dB
Center Step Resolution 1 dB
C
Space Step Resolution 1 dB
S
Perspective 1 Input Signal of 125Hz
12 dB
SPACE= 0dB,CENTER= MUTE
R
in = GND; Lin → ROUT
Perspective 2 Input Signal of 2.15KHz
0dB
SPACE= 0dB,CENTER= MUTE
R
= GND; Lin→ R
in
OUT
-8.5 dB
R
in = GND; Lin → ROUT
5/20
TDA7465
ELECTRICALCHARACTERISTICS (continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
SPEAKER & RECORDATTENUATORS
C
range
S
STEP
E
A
V
DC
A
MUTE
R
VAR
SPEAKER ATTENUATORS
V
TH
AUDIOOUTPUTS
N
O(OFF)
N
O(MOV)
N
O(MUS)
N
O(SIM)
N
O(SRS)
d Distorsion Av = 0 ; V
S
C
V
OCL
R
OUT
V
OUT
BUS INPUTS
V
IL
V
IH
I
IN
V
O
Control Range 79 dB
Step Resolution 0.5 1 1.5 dB
Attenuation set error Av = 0 to -20dB -1.5 0 1.5 dB
Av = -20 to -79dB -3 0 2 dB
DC Steps Adjacent att. steps -3 0 3 mV
Output Mute Condition 70 100 dB
Input Impedance 22.5 30 37.5 KΩ
Zero CrossingThreshold D7 = 0
Output Noise (OFF) Output Mute, Flat
B
= 20Hz to 20KHz
W
Output Noise (Movie) Standard
Surround Sound
Output Noise (Music) Standard
Surround Sound
Output Noise (Simulated)
Standard Surround Sound
Output Noise (SRS)
Mode =Movie ,
B
= 20Hz to 20KHz
W
Mode = Music ,
B
= 20Hz to 20KHz,
W
Mode = Simulated,
B
= 20Hz to 20KHz
W
BW= 20Hz to 20KHz 50 µVrms
V
S
+
20 mV
2
4
5
30 µVrms
30 µVrms
30 µVrms
Surround Sound
= 1Vrms 0.01 0.1 %
in
Channel Separation 70 90 dB
Clipping Level d = 0.3% 2 2.5 Vrms
Output Resistance 10 30 50 Ω
DC Voltage Level 3.8 V
Input Low Voltage 1V
Input High Voltage 3 V
Input Current -5 +5 µA
Output Voltage SDA
IO= 1.6mA 0.4 V
Acknowledge
Vrms
µ
Vrms
µ
6/20
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