TDA7462 Datasheet, PDF (1/25 Pages) STMicroelectronics – DUAL AUDIOPROCESSOR WITH COMPANDER AND SUBWOOFER OUTPUT

®
TDA7462
DUAL AUDIOPROCESSOR WITH COMPANDER
AND SUBWOOFER OUTPUT
FULLY INTEGRATED AUDIOPROCESSOR
5 STEREO + 1 MONO INPUTS
FOUR INDEPENDENT SPEAKER OUTPUTS
DYNAMIC COMPRESSION STAGE FOR CD
SUBWOOFER OUTPUT
SOFTSTEP FEATURE FOR VOLUME
VOICE-BAND FILTER
DIRECT MUTE AND SOFTMUTE
PAUSE DETECTOR
FULLY PROGRAMMABLE BY I²C BUS IN-
TERFACE
SO28
ORDERING NUMBER: TDA7462D
DESCRIPTION
The TDA7462 is a high performance audioproc-
essor with fully integrated audio filters. The digi-
tal control allows the programming of all filter
characteristics in a wide range without the need
of external components. New innovative features
are included , a dynamic compression stage to
BLOCK DIAGRAM
optimize audio response of CD sources an addi-
tional output channel for subwoofer and a sepa-
rate source selector for rear channel. The use of
a dedicated BICMOS process makes signal proc-
essing very linear thus achieving low distortion
and low noise figures.
CD R+ CD L- CD L+
8
6
5
CD R-
PDR
PDGND
PDL
SE1L
SE1R
SE2R
SE2L
MD+
MD-
SEM/SE3L
SE3R
7
9
10
FRONT
11
SELECTOR
1
INPUT
2
MULTIPLEXER
+ MIXING-STAGE
13
12
REAR
3
SELECTOR
4
28
27
IN-GAIN +
AUTO ZERO
LOUDNESS
VOLUME
COMPANDER
IN-GAIN
MUTE
26
SOFT
MUTE
TREBLE
LOUDNESS
BASS
VOICE-BANDPASS
HP
LP
SUBWOOFER
LP
MONO
FADER
PAUSE ^{23 PAUSE}
DETECT.
BEEP
SUPPLY
16
V_S
15
GND
14
CREF
DIGITAL CONTROL
FRONT ²²
FADER
OUT LF
FRONT ²¹
FADER
OUT RF
REAR ¹⁹ _{OUT RR}
FADER
REAR
FADER
20
OUT RL
18
SUBWOOFER
OUT
17
SUBOUT+
SUBOUT-
I²C BUS
25
SDA
24
SCL
D96AU864
November 2001
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