TDA7435D ST Microelectronics, TDA7435D Datasheet

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TDA7435D

Manufacturer Part Number
TDA7435D
Description
DIGITALLY CONTROLLED AUDIO PROCESSOR WITH LOUDSPEAKERS EQUALIZER
Manufacturer
ST Microelectronics
Datasheet

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

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TDA7435D Summary of contents

Page 1

... GAIN 2 0-15dB/1dB step AUX November 1996 WITH LOUDSPEAKERS EQUALIZER 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- ...

Page 2

TDA7435 ABSOLUTE MAXIMUM RATINGS Symbol V Operating Supply Voltage S T Operating Ambient Temperature amb T Storage Temperature Range stg PIN CONNECTION AUX AUX AUX 1 OUT R AUX 1 OUT L AUX 2 ...

Page 3

ELECTRICAL CHARACTERISTICS ( 1KHz. Refer to the test circuit, unless otherwise specified.) Symbol Parameter INPUT STAGE: AUX1 R Input Resistance I V Clipping Level CL S Input Separation I G Minimum Input Gain I MIN G Maximum Input ...

Page 4

TDA7435 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter V Soft Mute Threshold THSM R Pullup Resistor (pin 3) INT V (pin 3) Level High SMH V (pin 3) Level Low SML GENERAL V Supply Voltage CC I Supply Current CC PSRR Power ...

Page 5

I C BUS INTERFACE Data transmission from microprocessor to the TDA7435 and viceversa takes place thru the 2 2 wires I C BUS interface, consisting of the two lines SDA and SCL (pull-up resistors to positive supply voltage must ...

Page 6

TDA7435 SOFTWARE SPECIFICATION Interface Protocol The interface protocol comprises: A start condition (s) A chip address byte,(the LSB bit determines CHIP ADDRESS MSB LSB R/W ACK ACK = Acknowledge S = Start ...

Page 7

DATA BYTE SPECIFICATION MUX & GAIN MSB Mute MSB LSB AUX 1 Input Gain 0dB ...

Page 8

TDA7435 Speaker MSB ...

Page 9

SO28 PACKAGE MECHANICAL DATA DIM. MIN. TYP 0.1 b 0. 1.27 e3 16.51 F 7 MAX. MIN. 2.65 0.3 0.004 0.49 0.014 0.32 0.009 0.5 ...

Page 10

TDA7435 2 Purchase Components of SGS-THOMSON Microlectronics, conveys a license under the Philips Patent Rights to use these components the I C Standard Specifications as defined by Philips. Information furnished ...

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