TDA7345 datasheet(1/18 Pages) STMICROELECTRONICS

部件名	TDA7345

功能描述	DIGITALLY CONTROLLED AUDIO PROCESSOR WITH SURROUND SOUND MATRIX

PDF	18 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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TDA7345

DIGITALLY CONTROLLED AUDIO PROCESSOR

WITH SURROUND SOUND MATRIX

1 STEREO INPUT

VOLUME CONTROL IN 1.25dB STEP

TREBLE AND BASS CONTROL

THREE SURROUND MODES ARE AVAIL-

ABLE:

– MOVIE, MUSIC AND SIMULATED

FOUR SPEAKER ATTENUATORS:

– 4 INDEPENDENT SPEAKERS CONTROL

IN 1.25dB STEPS FOR BALANCE FACILITY

– INDEPENDENT MUTE FUNCTION

ALL FUNCTIONS PROGRAMMABLE VIA SE-

RIAL BUS

DESCRIPTION

The TDA7345 is a volume tone (bass and treble)

balance (Left/Right) processor for quality audio

applications in car radio and Hi-Fi systems.

It reproduces surround sound by using phase

shifters and a signal matrix. Control of all the

functions is accomplished by serial bus.

The AC signal setting is obtained by resistor net-

works and switches combined with operational

amplifiers.

Thanks to the used BIPOLAR/CMOS Technology,

Low Distortion, Low Noise and DC stepping are

obtained.

November 1999

®

HP2

L-in

BASS-LA

BASS-LB

TREBLE-L

REC_OUT_R

REC_OUT_L

Lout

Rout

1

3

2

4

5

6

7

8

9

AGND

SCL

SDA

TREBLE-R

DIG GND

BASS-RB

BASS-RA

R-in

REAR OUT

23

22

21

20

19

17

18

16

15

D94AU191A

10

11

12

13

14

28

27

26

25

24

CREF

PS2

PS1

LP1

HP1

REAR IN

LP

PS4

PS3

Vs

PIN CONNECTION

ORDERING NUMBER: TDA7345D

SO28

1/18

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