TDA7435 Datasheet, PDF (1/10 Pages) STMicroelectronics – DIGITALLY CONTROLLED AUDIO PROCESSOR WITH LOUDSPEAKERS EQUALIZER

TDA7435
DIGITALLY CONTROLLED AUDIO PROCESSOR
WITH LOUDSPEAKERS EQUALIZER
INPUT
- FOUR HIGH PASS CHANNELS
- TWO AUX STEREO CHANNELS
VOLUME CONTROL IN 1dB STEPS WITH
GAIN UP TO 15dB
SOFT MUTE AND DIRECT MUTE
FOUR AUXILIARY CHANNELS:
- TWO SPEAKERS CONTROL IN 1dB STEP
- TWO CHANNELS MULTIPLEXED WITH
THE HIGH PASS CHANNELS
ALL FUNCTIONS PROGRAMMABLE VIA SE-
RIAL I² CBUS
DESCRIPTION
The audioprocessor TDA7435 is an upgrade of
the TDA731X audioprocessor family.
Due to a highly linear signal processing, using
CMOS-switching techniques instead of standard
bipolar multipliers, very low distortion and very
low noise are obtained.
SO28
ORDERING NUMBER: TDA7435D
A second programmable high pass filtering pro-
vides the loudspeakers equalization.
The soft Mute function is implemented andcan be
activated in two ways:
1 Via serial bus (Mute byte, bit D0)
2 Directly on pin 3 through an I/O line of the mi-
crocontroller
Very low DC stepping is obtained by use of a
BICMOS technology.
BLOCK DIAGRAM
22
HP FL 1
21
HP FL 2
20
HP FR 1
19
HP FR 2
18
HP RL 1
17
HP RL 2
16
HP RR 1
15
HP RR 2
6
AUX 2 IN L
7
AUX 2 IN R
HP FILTER
HP FILTER
HP FILTER
HP FILTER
1
AUX 1 IN L
2
AUX 1 IN R
GAIN
0-15dB/1dB step
CSM
3
SOFT
MUTE
SDA SCL DGND AGND CREF V_CC
27 26 25 24 23 28
I²C BUS
SUPPLY
12
OUT REF
MUX
ATTENUATOR
0/-79dB
ATTENUATOR
0/-79dB
10
HP FL OUT
11
HP FR OUT
13
HP RL OUT
14
HP RR OUT
9
AUX 2 OUT L
8
AUX 2 OUT R
5
AUX 1 OUT L
4
AUX 1 OUT R
November 1996
D96AU437A
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