TDA7438 datasheet(1/17 Pages) STMICROELECTRONICS

部件名	TDA7438

功能描述	THREE BANDS DIGITALLY CONTROLLED AUDIO PROCESSOR

PDF	17 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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TDA7438

THREE BANDS

DIGITALLY CONTROLLED AUDIO PROCESSOR

INPUT MULTIPLEXER

- 3 STEREO INPUTS

- SELECTABLE INPUT GAIN FOR OPTIMAL

ADAPTATION TO DIFFERENT SOURCES

ONE STEREO OUTPUT

TREBLE, MIDDLE AND BASS CONTROL IN

2.0dB STEPS

VOLUME CONTROL IN 1.0dB STEPS

TWO SPEAKER ATTENUATORS:

- TWO INDEPENDENT SPEAKER CONTROL

IN 1.0dB STEPS FOR BALANCE FACILITY

- INDEPENDENT MUTE FUNCTION

ALL FUNCTION ARE PROGRAMMABLE VIA

SERIAL BUS

DESCRIPTION

The TDA7438 is a volume tone (bass, middle and

treble) balance (Left/Right) processor for quality

audio applications in car-radio and Hi-Fi systems.

Selectable input gain is provided. 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.

April 1999

®

0/30dB

2dB STEP

MUXOUTL

INL

VOLUME

TREBLE

TREBLE(L)

MIDDLE

MUXOUTR

INR

TREBLE(R)

BOUT(L)

SPKR ATT

LEFT

LOUT

SCL

SDA

DIG_GND

ROUT

D96AU488A

I

2CBUS DECODER + LATCHES

100K

G

L-IN1

L-IN2

L-IN3

100K

R-IN1

R-IN2

R-IN3

G

INPUT MULTIPLEXER

+ GAIN

MOUT(L)

BASS

BIN(L)

BASS

SPKR ATT

RIGHT

MIN(R) MOUT(R)

BOUT(R)

BIN(R)

SUPPLY

CREF

AGND

VS

MIN(L)

27

3

4

5

2

1

28

21

22

20

26

24

25

8

9

19

10

11

12

13

23

6

7

18

17

16

14

15

R

M

R

B

RM

RB

V

REF

BLOCK DIAGRAM

ORDERING NUMBER: TDA7438D (SO28)

TDA7438 (DIP28)

SO28

DIP28

1/17

类似零件编号 - TDA7438

制造商	部件名	数据表	功能描述
STMicroelectronics	TDA7438	198Kb / 19P	THREE BANDS DIGITALLY CONTROLLED AUDIO PROCESSOR Jun-2004
	TDA7438D	198Kb / 19P	THREE BANDS DIGITALLY CONTROLLED AUDIO PROCESSOR Jun-2004
	TDA7438D013TR	198Kb / 19P	THREE BANDS DIGITALLY CONTROLLED AUDIO PROCESSOR Jun-2004
	TDA7438	198Kb / 19P	THREE BANDS DIGITALLY CONTROLLED AUDIO PROCESSOR Jun-2004

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