TDA7437N Datasheet, PDF (1/23 Pages) STMicroelectronics – DIGITALLY CONTROLLED AUDIO PROCESSOR

TDA7437N
DIGITALLY CONTROLLED AUDIO PROCESSOR
s INPUT MULTIPLEXER
– FOUR STEREO, ONE MONO INPUT, AND
ONE DIFFERENTIAL INPUT
– SELECTABLE INPUT GAIN FOR OPTIMAL
ADAPTATION TO DIFFERENT SOURCES
s FULLY PROGRAMMABLE LOUDNESS
FUNCTION
s VOLUME CONTROL IN 1dB STEPS
INCLUDING GAIN UP TO 16dB
s ZERO CROSSING MUTE, SOFT MUTE AND
DIRECT MUTE
s BASS AND TREBLE CONTROL
s FOUR SPEAKER ATTENUATORS- FOUR
INDEPENDENT SPEAKERS CONTROL IN
1dB STEPS FOR BALANCE AND FADER
FACILITIES
s PAUSE DETECTOR PROGRAMMABLE
THRESHOLD
s ALL FUNCTIONS PROGRAMMABLE VIA
SERIAL I²C BUS
PIN DESCRIPTION (Top view)
TQFP44
ORDERING NUMBER: TDA7437N
DESCRIPTION
The audioprocessor TDA7437N is an upgrade of the
TDA731X audioprocessor family.
Due to a highly linear signal processing, using
CMOS-switching techniques instead of standard bi-
polar multipliers, very low distortion and very low
noise are obtained. Several new features like soft-
mute, and zero-crossing mute are implemented.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 BIC-
MOS technology.
October 2003
TREB_R
IN_R
MUXOUT_R
LOUD_R
DIFFGND_R
DIFF_R
STEREO4_R
STEREO1_R
STEREO2_R
STEREO3_R
MONO
44 43 42 41 40 39 38 37 36 35 34
1
33
2
32
3
31
4
30
5
29
6
28
7
27
8
26
9
25
10
24
11
23
12 13 14 15 16 17 18 19 20 21 22
OUT_RF
OUT_LR
MID_LI
MID_LO
OUT_RR
SMEXT
BASS_RO
BASS_RI
BASS_LO
BASS_LI
MID_RO
D96AU435B
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