TDA7340G datasheet(1/27 Pages) STMICROELECTRONICS

部品番号	TDA7340G

部品情報	AUDIO SIGNAL PROCESSOR

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TDA7340G

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:

ROLL-OFF ADJUSTMENT

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

DEVIATION AND FIELD STRENGTH DE-

PENDENT TRIGGER ADJUSTMENT

PAUSE DETECTOR:

PROGRAMMABLE THRESHOLD

ALLFUNCTIONS PROGRAMMABLEVIA I

2CBUS

DESCRIPTION

The TDA7340G I

2C bus controlled audio signal

processor contains all signal processing blocks of

a high performance car radio, including audio-

processor, stereodecoder, noise blanker, pause

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 pilot cancellation.

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

®

ORDERING NUMBER: TDA7340G

PQFP44

1/27

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