TDA7348 Digitally controlled audio processor

Features:

Input multiplexer
Three stereo and one mono inputs
Selectable input gain for optimal adaptation to different sources
Volume control in 0.3db steps including 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 serial I2C bus

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, either via the serial bus (bit D0, Mute Byte), or directly on pin 22 through an I/O line of the microcontroller Very low DC stepping is obtained by use of a BICMOS technology.

Circuit Diagram:

Circuit Diagram

Datasheet TDA7348: Download

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