3 GENERAL DESCRIPTION

The UDA1334ATS is a single chip 2 channel

digital-to-analog converter employing bitstream

conversion techniques, including an on-board PLL.

The extremely 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 a playback function.

The UDA1334ATS supports the I2S-bus 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 UDA1334ATS has basic features such as

de-emphasis (44.1 kHz sampling frequency, only

supported in audio mode) and mute.

FEATURES

General

• 2.4 to 3.6 V power supply voltage

• On-board PLL to generate the internal system clock:

– Operates as an asynchronous DAC, regenerating the

internal clock from the WS signal (called audio mode)

– Generates audio related system clock (output) based

on 32, 48 or 96 kHz sampling frequency (called video

mode).

• Integrated digital filter plus DAC

• Supports sample frequencies from 16 to 100 kHz in

asynchronous DAC mode

• No analog post filtering required for DAC

• Easy application

• SSOP16 package.

1.2 Multiple format data interface

• I2S-bus and LSB-justified format compatible

• 1fs input data rate.

1.3 DAC digital features

• Digital de-emphasis for 44.1 kHz sampling frequency

• Mute function.

1.4 Advanced audio configuration

• High linearity, wide dynamic range and low distortion.

1.5 PLL system clock generation

• Integrated low jitter PLL for use in applications in which

there is digital audio data present but the system cannot

provide an audio related system clock. This mode is

called audio mode.

• The PLL can generate 256 × 48 kHz and 384 × 48 kHz

from a 27 MHz input clock. This mode is called video mode.

2 APPLICATIONS

This audio DAC is excellently suitable for digital audio

portable application, specially in applications in which an

audio related system clock is not present.