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廬

TDA7401

DIGITALLY CONTROLLED AUDIO PROCESSOR

WITH LOUDSPEAKERS EQUALIZER

FOUR HIGH PASS CHANNELS

ONE STEREO LOW PASS CHANNEL WITH

GAIN CONTROL

DIRECT MUTE PIN

FULLY PROGRAMMABLE VIA I

2

C BUS

DESCRIPTION

The TDA7401 is an upgrade of the TDA7435

audioprocessor.

Due to a highly linear signal processing, using

CMOS-switching techniques very low distortion

and very low noise are obtained.

Second order high pass and low pass filters with

programmable corner frequencies provide the

loudspeaker equalization.

BLOCK DIAGRAM

SO28

ORDERING NUMBER:

TDA7401D

Very low DC stepping is obtained by using a

BICMOS technology.

MUTE

22

21

20

19

18

17

16

15

HP FILTER

HP FILTER

HP FILTER

MUTE

HP FILTER

3

SDA SCL DGND AGND CREF

27

26

25

24

23

V

CC

28

12

HP FL 1

HP FL 2

HP FR 1

HP FR 2

HP RL 1

HP RL 2

HP RR 1

HP RR 2

I

2

C BUS

SUPPLY

OUT REF

10

11

13

14

9

MUX

8

HP FL OUT

HP FR OUT

HP RL OUT

HP RR OUT

AUX 2 OUT L

AUX 2 OUT R

AUX 1 IN L

AUX 1 IN R

1

2

GAIN

+20/-79dB

4

5

7

CR2

6

CL2

D98AU822A

CR1 CL1

January 1999

1/10

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