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UDA1343

Economy audio CODEC with features

Philips Electronics 

Philips Semiconductors

Economy audio CODEC with features

Preliminary specification

UDA1343TT

FEATURES

General

• Low power consumption

• 2.4 V to 3.6 V power supply range, with 3 V typical

• 5 V tolerant TTL compatible digital inputs

• 256, 384 and 512fs system clock

• Supports sampling frequencies from 8 to 110 kHz

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

cancel DC offset

• The ADC supports 2 V (RMS) input signals

• Stereo PGA with 0 to 24 dB gain in 3 dB steps

• Overload detector for easy record level control

• Separate power control for ADC + PGA and DAC

• Integrated digital interpolation filter plus non-inverting

DAC

• Functions controllable by L3 microcontroller interface

• Small package size (TSSOP28)

• ADC and DAC output polarity can be set.

Multiple format input interface

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

16, 18, 20 and 24 bits format compatible

• Four combined data formats with MSB data output and

LSB 16, 18, 20 and 24 bits data input

• 1fs input and output format data rate.

DAC digital sound processing

• Digital dB-linear volume control (low microcontroller

load) via L3 microcontroller in 0.25 dB steps

• Digital de-emphasis for 32, 44.1, 48 and 96 kHz

• Cosine roll-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

• Digital silence detector

• Digital mixer for mixing ADC signal and playback signal

• ADC volume control in 0.25 dB steps and cosine roll-off

mute.

APPLICATIONS

• Portable equipment which includes audio functions

• Digital video camera.

GENERAL DESCRIPTION

The UDA1343TT is a single-chip stereo Analog-to-Digital

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

with basic signal processing features employing bitstream

conversion techniques. The low power consumption, the

small package size 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 UDA1343TT is equipped with a digital mixer for mixing

the ADC signal directly to the playback signal (for example

for Karaoke applications). In the mixing mode the ADC

output signal can be output before or after the mixer.

The mixer can also be used as a selector to select

between the ADC or the digital data being played back at

the DAC.

ORDERING INFORMATION

TYPE

NUMBER

UDA1343TT

NAME

TSSOP28

PACKAGE

DESCRIPTION

plastic shrink small outline package; 28 leads; body width 4.4 mm

VERSION

SOT361-1

2000 Jan 12

2

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