TDA7340 Datasheet, PDF (1/16 Pages) STMicroelectronics – AUDIO SIGNAL PROCESSOR

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TDA7340
AUDIO SIGNAL PROCESSOR
AUDIOPROCESSOR:
MUTE, SOFT MUTE AND ZERO CROSSING
MUTE
ONE DIFFERENTIAL, TWO STEREO AND
TWO MONO INPUTS
DIFFERENTIAL PHONE INPUT
VOLUME, BASS, TREBLE AND LOUDNESS
CONTROL
FOUR SPEAKER ATTENUATORS WITH IN-
DEPENDENT ATTENUATION CONTROL
STEREODECODER:
ADJUSTMENT FREE INTEGRATED 456KHz
VCO
HIGH CUT CONTROL
STEREO BLEND
NOISE BLANKER:
INTEGRATED HIGH-PASS FILTER
NOISE RECTIFIER OUTPUT FOR QUALITY
DETECTION
PROGRAMMABLE TRIGGER THRESHOLD
PAUSE DETECTOR:
PROGRAMMABLE THRESHOLD
ALLFUNCTIONS PROGRAMMABLEVIA I²C BUS
DESCRIPTION
The TDA7340 I²C bus controlled audio signal
processor contains all signal processing blocks of
a high performance car radio, including audio-
processor, stereodecoder, noise blanker, pause
PQFP44
ORDERING NUMBER: TDA7340P
detector and different mute functions.
The use of BICMOS technology allows the imple-
mentation of several filter functions with switched
capacitor techniques like fully integrated, adjust-
ment free PLL Loop filter, pilot detector with inte-
grator and two 19KHz notch filters.
This minimizes the number of external compo-
nents.
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 also in the stereodecoder
part. The audioprocessor contains several new
features like softmute, zero-crossing mute and
pause detector.
Very low Dc stepping is obtained by use of a
BICMOS technology.
September 1999
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