TDA7429L Datasheet, PDF (1/16 Pages) STMicroelectronics – 3 BAND EQUALIZER AUDIO PROCESSOR WITH SUBWOOFER CONTROL

TDA7429L
3 BAND EQUALIZER AUDIO PROCESSOR
WITH SUBWOOFER CONTROL
s 3 STEREO INPUTS
s AUXILIARY MONO INPUT
s INPUT ATTENUATION CONTROL IN 0.5dB
STEP
s TREBLE MIDDLE AND BASS CONTROL
s FOUR SPEAKERS ATTENUATORS:
- 4 INDEPENDENT SPEAKERS CONTROL IN
1dB STEPS FOR BALANCE FACILITY
- INDEPENDENT MUTE FUNCTION
s SUBWOOFER OUTPUT (L+R) CONTROLLED
IN 1dB STEP INPUTS
s ALL FUNCTIONS PROGRAMMABLE VIA
SERIAL BUS
DESCRIPTION
The TDA7429L is volume tone (bass middle and tre-
ble) balance (Left/Right) processors for quality audio
applications in TV and Hi-Fi systems, providing also
Figure 1. Test Circuit
SDIP42
ORDERING NUMBER: TDA7429L
an additional subwoofer control.
The AC signal setting is obtained by resistor networks
and switches combined with operational amplifiers.
Thanks to the used BIPOLAR/CMOS Technology,
Low Distortion, Low Noise and DC stepping are ob-
tained.
2.2µF
2.2µF
0.47µF
BASSO_R VAR_R BASSO_L VAR_L MONO INPUT
14
13
12
11
10
L+R OUTPUT 9
0.47µF
R_IN3
40
0.47µF
R_IN2
39
38
R_IN1
0.47µF
N.C. 1
N.C. 2
N.C. 3
N.C. 4
N.C. 7
LP
100nF
LP1
100nF
TREBLE_R
5.6nF
TREBLE_L
100nF
MONITOR_R
22nF
MIDDLE_LO
18nF
2.7K
MIDDLE_LI
22nF
MIDDLE_RO
18nF
2.7K
MIDDLE_RI
5
6
23
24
37
19
20
21
22
32
31
30
29
28
27
AUXOUT_L AUXOUT_R L_OUT R_OUT DIG_GND SCL
26
SDA
25
AGND
36 MONITOR_L
L_IN1
35
0.47µF
L_IN2
34
0.47µF
L_IN3
33
0.47µF
V_S
42
10µF
100nF
CREF
41
22µF
8
HP2
220nF
100nF
15
BASS_LO
100nF
16
BASS_LI
5.6K
100nF
BASS_RO
17
100nF
18
BASS_RI
5.6K
D99AU1029
March 2000
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