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UDA1340M

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

Philips Electronics 

Philips Semiconductors

Low-voltage low-power stereo audio

CODEC with DSP features

Preliminary specification

UDA1340

FEATURES

General

• Low power consumption

• 3.0 V power supply

• 256, 384 and 512fs system clock

• Small package size (SSOP28)

• ADC plus integrated high pass filter to cancel DC offset

• Overload detector for easy record level control

• Separate power control for ADC and DAC

• Integrated digital filter plus DAC

• No analog post filter required for DAC

• Easy application

• Functions controllable by microcontroller interface.

Multiple format input interface

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

compatible

• 1fs input and output format data rate.

DAC digital sound processing

• Digital volume control

• Digital tone control, bass boost and treble

• dB-linear volume and tone control (low microcontroller

load)

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

• Soft mute.

GENERAL DESCRIPTION

The UDA1340 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 UDA1340 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 serial

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

The UDA1340 has special sound processing features in

playback mode, de-emphasis, volume, bass boost, treble,

and soft mute, which can be controlled via the

microcontroller interface.

Advanced audio configuration

• Stereo single-ended input configuration

• Stereo line output (under microcontroller volume

control)

• Power-down click prevention circuitry

• High linearity, dynamic range, low distortion.

ORDERING INFORMATION

TYPE

NUMBER

UDA1340M

NAME

SSOP28

PACKAGE

DESCRIPTION

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

VERSION

SOT341-1

1997 Jul 09

2

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