UDA1342TS Просмотр технического описания (PDF) - Philips Electronics

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UDA1342TS

Audio CODEC

Philips Electronics 

Philips Semiconductors

Audio CODEC

Preliminary specification

UDA1342TS

1 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 × stereo) single-ended inputs with

programmable gain amplifiers and 2 channel

(1 × 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.

2 APPLICATIONS

• Eminently suitable for MiniDisc (MD) home and portable

applications.

3 GENERAL DESCRIPTION

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.

2000 Mar 29

3

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