描述 Description

Overview
The UDA1342TS is a single-chip 4 channel analog-to-digital converter and 2 channel digital-to-analog converter with signal processing features employing bitstream conversion techniques. The low power consumption and low voltage requirements make the device eminently suitable for use in low-voltage low-power portable digital audio equipment which incorporates recording and playback functions.

The UDA1342TS supports the I2S-bus data format with word lengths of up to 24 bits, the MSB-justified data format with word lengths of up to 24 bits and the LSB-justified serial data format with word lengths of 16, 20 and 24 bits. The device also supports a combination of the MSB-justified output format and the LSB-justified input format.

The UDA1342TS has special sound processing features in the playback mode such as de-emphasis, volume, mute, bass boost and treble, which can be controlled by the microcontroller via the L3-bus or I2C-bus interface.

特性 Features

General



2.7 to 3.6 V power supply

5 V tolerant digital inputs

High pin compatibility with UDA1341TS

24 bits data path

Selectable control via L3-bus interface, I2C-bus interface or static pin control; choice of 2 device addresses in L3-bus and I2C-bus mode

Supports sample frequencies from 16 to 110 kHz

Separate power control for ADC and DAC

ADC and Programmable Gain Amplifiers (PGA) plus integrated high-pass filter to cancel DC offset

Integrated digital filter plus DAC

Digital silence detection

No analog post filtering required for DAC

Slave mode only applications

Easy application.



Multiple format data interface



I2S-bus, MSB-justified and LSB-justified format compatible

1fs to 4fs input and 1fs output format data rate.



DAC digital sound processing



Separate digital logarithmic volume control for left and right channels in L3-bus mode or I2C-bus mode

Digital tone control, bass boost and treble in L3-bus mode or I2C-bus mode

Digital de-emphasis for sample frequencies of 32, 44.1, 48 and 96 kHz in L3-bus mode or I2C-bus mode

Soft or quick mute in L3-bus mode or I2C-bus mode

Output signal polarity control in L3-bus mode or I2C-bus mode

Digital mixer for ADC output signal and digital serial input signal.



Advanced audio configuration



4 channel (2 x stereo) single-ended inputs with programmable gain amplifiers and 2 channel (1 x stereo) single-ended outputs configuration

Output signal polarity control in L3-bus mode or I2C-bus mode

High linearity, wide dynamic range, low distortion

Double differential input configuration for enhanced ADC sound quality.

應(yīng)用 Application

Eminently suitable for MiniDisc (MD) home and portable applications.