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TDA7348 Datasheet

  • TDA7348

  • DIGITALLY CONTROLLED AUDIO PROCESSOR

  • 14頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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TDA7348
DIGITALLY CONTROLLED AUDIO PROCESSOR
PRODUCT PREVIEW
INPUT MULTIPLEXER
- THREE STEREO AND ONE MONO INPUTS
- SELECTABLE INPUT GAIN FOR OPTIMAL
ADAPTATION TO DIFFERENT SOURCES
VOLUME CONTROL IN 0.3dB STEPS IN-
CLUDING GAIN UP TO 20dB
ZERO CROSSING MUTE AND DIRECT
MUTE
PAUSE DETECTOR WITH PROGRAMMABLE
THRESHOLD
SOFT MUTE CONTROLLED BY SOFTWARE
OR HARDWARE PIN
BASS AND TREBLE CONTROL
FOUR SPEAKER ATTENUATORS
- FOUR INDEPENDENT SPEAKERS
CONTROL IN 1.25dB STEPS FOR
BALANCE AND FADER FACILITIES
- INDEPENDENT MUTE FUNCTION
ALL FUNCTIONS PROGRAMMABLE VIA SE-
RIAL I
2
CBUS
DESCRIPTION
The TDA7348 is an upgrade of the TDA7318
audioprocessor.
Thanks to the used BIPOLAR/CMOS technology,
very low distortion, low noise and DC-stepping
are obtained.
DIP28
SO28
ORDERING NUMBER:
TDA7348 (DIP28)
TDA7348D (SO28)
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, zero-crossing mute and pause detector
are implemented.
The Soft Mute function can be activated in two
ways:
1 Via serial bus (bit D0, Mute Byte)
2 Directly on pin 22 through an I/O line of the
microcontroller
Very low DC stepping is obtained by use of a
BICMOS technology.
November 1994
1/14
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

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