TDA7437 datasheet(1/23 Pages) STMICROELECTRONICS

部件名	TDA7437

功能描述	DIGITALLY CONTROLLED AUDIO PROCESSOR

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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TDA7437

DIGITALLY CONTROLLED AUDIO PROCESSOR

INPUT MULTIPLEXER

- FOUR STEREO, ONE MONO INPUT, AND

ONE DIFFERENTIAL INPUT

- SELECTABLE INPUT GAIN FOR OPTIMAL

ADAPTATION TO DIFFERENT SOURCES

FULLY

PROGRAMMABLE

LOUDNESS

FUNCTION

VOLUME CONTROL IN 1dB STEPS INCLUD-

ING GAIN UP TO 16dB

ZERO CROSSING MUTE, SOFT MUTE AND

DIRECT MUTE

BASS AND TREBLE CONTROL

FOUR SPEAKER ATTENUATORS

- FOUR INDEPENDENT SPEAKERS

CONTROL IN 1dB STEPS FOR

BALANCE AND FADER FACILITIES

PAUSE

DETECTOR

PROGRAMMABLE

THRESHOLD

ALL FUNCTIONS PROGRAMMABLE VIA SE-

RIAL I

2 CBUS

DESCRIPTION

The audioprocessor TDA7437 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. Several new features like

softmute, and zero-crossing mute are imple-

mented.

The soft Mute function can be activated in two

ways:

1 Via serial bus (Mute byte, bit D0)

2 Directly on pin 28 through an I/O line of the

microcontroller

Very low DC stepping is obtained by use of a

BICMOS technology.

December 1999

ORDERING NUMBERS: TDA7437 (PQFP44)

TDA7437T (TQFP44)

PQFP44 and TQFP44

1

2

3

5

6

4

7

8

9

10

17

11

18 19 20 21 22

44 43 42 41

39

40

38 37 36 35 34

28

27

26

24

23

25

33

32

31

29

30

DIFF_R

DIFFGND_R

LOUD_R

IN_R

TREB_R

MUXOUT_R

MONO

STEREO3_R

STEREO2_R

STEREO4_R

STEREO1_R

SMEXT

BASS_RO

BASS_RI

BASS_LI

MID_LO

BASS_LO

OUT_RF

OUT_LR

MID_RI

OUT_RR

MID_RO

D96AU435A

12 13 14 15 16

PIN CONNECTION

®

1/23

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