UDA1345 Просмотр технического описания (PDF) - Philips Electronics

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UDA1345

Economy audio CODEC

Philips Electronics 

Philips Semiconductors

Economy audio CODEC

Product specification

UDA1345TS

1 FEATURES

1.1 General

• Low power consumption

• 2.4 to 3.6 V power supply range with 3.0 V typical

• 5 V tolerant TTL compatible digital inputs

• 256, 384 and 512fs system clock

• Supports sampling frequencies from 8 to 100 kHz

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

cancel DC offset

• The 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 by L3 microcontroller

interface or via static pins

• The UDA1345TS is pin and function compatible with the

UDA1344TS

• Small package size (SSOP28).

1.2 Multiple format input interface

• I2S-bus, MSB-justified up to 24 bits and LSB-justified

16, 18 and 20 bits format compatible

• Three combined data formats with MSB data output and

LSB 16, 18 and 20 bits data input

• 1fs input and output format data rate.

1.3 DAC digital sound processing

The sound processing features of the UDA1345TS can

only be used in L3 microcontroller mode:

• Digital dB-linear volume control (low microcontroller

load) via L3 microcontroller with 1 dB steps

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

• Soft mute via cosine roll-off (in 1024 samples).

Note: in contrast to the UDA1344TS, the UDA1345TS

does not have bass-boost and treble.

1.4 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.

2 GENERAL DESCRIPTION

The UDA1345TS 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 UDA1345TS 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 20 bits and the LSB justified

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

The UDA1345TS also supports three combined data

formats with MSB justified data output and LSB 16, 18

and 20 bits data input.

The UDA1345TS can be used either with static pin control

or under L3 microcontroller interface. In L3 mode the

UDA1345TS has basic sound features in playback mode

such as de-emphasis, volume control and soft mute.

3 ORDERING INFORMATION

TYPE NUMBER

UDA1345TS

NAME

SSOP28

PACKAGE

DESCRIPTION

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

VERSION

SOT341-1

2002 May 28

3

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