SGS Thomson Microelectronics TDA7432D Datasheet
BASIC FUNCTION AUDIO PROCESSOR
ONE STEREOANDONE MONOINPUTS
MUTE FUNCTION (SOFTWARE AND HARD-
WARE) CONTROLLED
VOLUMECONTROL IN 1dB STEP
BASS ANDTREBLECONTROL IN 2dBSTEP
FULLY PROGRAMMABLE LOUDNESS CON-
TROL
FOURSPEAKERATTENUATORS:
– Independentattenuationcontrol
– Independentmutefunction
ALL FUNCTIONS PROGRAMMABLE VIA
2
CBUS
I
DESCRIPTION
The TDA7432 is a volume, tone (bass and treble)
balance (Left/Right) processor for quality audio
applicationsincar radio and Hi-Fi systems.
Control is accomplished by serial bus microprocessor interface.
The AC signal setting is obtained by resistor net-
TDA7432
SO20
ORDERING NUMBER: TDA7432D
works and switches combined with operational
amplifiers.
Thanks to the advanced BIPOLAR/CMOS Technology, the external components have been reduced.
BLOCK DIAGRAM
IN_L
MONO_IN/MUTE
IN_R
S
68nF
3
MUX
4
2
17
MUX
SUPPLYV
20
GND
10µF 2.7nF
68nF
VOL
+ LOUD
VOL
+ LOUD
4.7K
100nF100nF
BASS TREBLE
S BUS DECODER + LATCHES
BASS TREBLE
100nF100nF
4.7K
2.7nF
TRLBOUTLBINLLOUD_L
119106
127851
TRRBOUTRLOUD_R BINRCREF
SPKR
ATT
SPKR
ATT
SPKR
ATT
SPKR
ATT
16
14
18
19
15
13
D95AU357A
LEFT FRONT
LEFT REAR
SCL
SDA
RIGHT FRONT
RIGHT REAR
August 1996
1/10
TDA7432
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
S
T
amb
T
stg
QUICK REFERENCEDATA
Symbol Parameter Min. Typ. Max. Unit
V
S
V
CL
THD Total Harmonic Distortion (V = 1Vrms f = 1kHZ) 0.05 %
S/N Signal to Noise Ratio 102 dB
Sc Channel Separation f = 1kHz 100 dB
Operating Supply Voltage 10.2 V
Operating Temperature Range -40 to 85 °C
Storage Temperature Range -55 to +150 °C
Supply Voltage 7 9 10.2 V
Max. Input Signal Handling 1.3 1.6 Vrms
Volume Control 1dB step -79 +32 dB
Bass Control 2dB step -18 +18 dB
Treble Control2dB step -14 +14 dB
Speaker Attenuators -37.5 0 dB
Mute Attenuation 100 dB
PIN CONNECTION(Top View)
MONO_IN/MUTE
LOUD_R
LOUD_L
BOUT_R
BOUT_L TRR
CREF
IN_R
IN_L
2
3
4
5
6
7
BIN_R
8
9
BIN_L TRL
10
D95AU358
20
19
18
17
16
15
14
13
12
11
GND1
SDA
SCL
V
S
OUT_LF
OUT_RF
OUT_LR
OUT_RR
THERMAL DATA
Symbol Parameter Value Unit
Thermal ResistanceJunction-pins Max. 150 °C/W
2/10
R
th j-pins
APPLICATIONCIRCUIT
TDA7432
68nF
IN_L
3
MUX
4
MONO_IN
/MUTE
IN_R
2
V
17
9V
V
S
100nF
S
MUX
SUPPLY
20
GND
4.7µF 2.7nF
68nF
VOL
+ LOUD
VOL
+ LOUD
4.7K
100nF100nF
BASS TREBLE
S BUS DECODER + LATCHES
BASS TREBLE
100nF100nF
4.7K
2.7nF
TRLBOUTLBINLLOUD_L
119106
127851
TRRBOUTRLOUD_R BINRCREF
SPKR
ATT
SPKR
ATT
SPKR
ATT
SPKR
ATT
16
14
18
19
15
13
D95AU359B
LEFT FRONT
LEFT REAR
SCL
SDA
RIGHT FRONT
RIGHT REAR
3/10
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