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UDA1344TS

Low-voltage low-power stereo audio CODEC with DSP features

Philips Electronics 

Philips Semiconductors

Low-voltage low-power stereo audio

CODEC with DSP features

Product specification

UDA1344TS

FEATURES

General

• Low power consumption

• 3.0 V power supply

• System clock of 256fs, 384fs and 512fs

• Supports sampling frequencies from 8 to 55 kHz

• Non-inverting ADC plus integrated high-pass filter to

cancel DC offset

• ADC supports 2 V (RMS) input signals

• Overload detector for easy record level control

• Separate power control for ADC and DAC

• Integrated digital interpolation filter plus non-inverting

DAC

• Functions controllable either via L3 microcontroller

interface or via static pins

• UDA1344TS is pin and function compatible with

UDA1340M

• Small package size (SSOP28)

• Easy application.

Multiple format input interface

• I2S-bus, MSB-justified or LSB-justified

16, 18 and 20 bits format compatible

• Three combined data formats with MSB-justified output

and LSB-justified 16, 18 and 20 bits input

• 1fs input and output format data rate.

DAC digital sound processing

The sound processing features of the UDA1344TS can be

used in the L3 mode only:

• Digital tone control, bass boost and treble

• Digital dB-linear volume control (low microcontroller

load) via L3 microcontroller

• Digital de-emphasis for 32, 44.1 and 48 kHz

• Soft mute.

Advanced audio configuration

• Stereo single-ended input configuration

• Stereo line output (under microcontroller volume

control), no post filter required

• High linearity, dynamic range and low distortion.

GENERAL DESCRIPTION

The UDA1344TS is a single-chip stereo Analog-to-Digital

Converter (ADC) and Digital-to-Analog Converter (DAC)

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 UDA1344TS supports the I2S-bus data format with

word lengths of up to 20 bits, the MSB-justified data format

with word lengths of up to 20 bits and the LSB-justified

data format with word lengths of 16, 18 and 20 bits. The

UDA1344TS also supports three combined data formats

with MSB-justified data output and LSB-justified

16, 18 and 20 bits data input.

The UDA1344TS can be controlled either via static pins or

via the L3 interface. In the L3 mode the UDA1344TS has

special Digital Sound Processing (DSP) features in

playback mode such as de-emphasis, volume control,

bass boost, treble and soft mute.

ORDERING INFORMATION

TYPE

NUMBER

UDA1344TS

NAME

SSOP28

PACKAGE

DESCRIPTION

plastic shrink small outline package; 28 leads; body width 5.3 mm

VERSION

SOT341-1

2001 Jun 29

2

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