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

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.

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.

This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

November 1994

ORDERING NUMBER: TDA7348 (DIP28)

TDA7348D (SO28)

DIP28

SO28

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