UDA1350ATS Ver la hoja de datos (PDF) - Philips Electronics

Número de pieza

componentes Descripción

Fabricante

UDA1350ATS

IEC 958 audio DAC

Philips Electronics 

Philips Semiconductors

IEC 958 audio DAC

Preliminary specification

UDA1350ATS

1 FEATURES

1.1 General

• 2.7 to 3.6 V power supply

• Integrated digital filter and Digital-to-Analog Converter

(DAC)

• 256fs system clock output

• 20-bit data path in interpolator

• High performance

• No analog post filtering required for DAC.

1.2 Control

• Controlled either by means of static pins or via the

L3 microcontroller interface.

1.3 IEC 958 input

• On-chip amplifier for converting IEC 958 input to CMOS

levels

• Lock indication signal available on pin LOCK

• Lock indication signal combined on-chip with the Pulse

Code Modulation (PCM) status bit; in case non-PCM

has been detected pin LOCK indicates out-of-lock

• Key channel-status bits available via L3 interface (lock,

pre-emphasis, audio sample frequency, two channel

PCM indication and clock accuracy).

1.4 Digital sound processing and DAC

• Automatic de-emphasis when using IEC 958 input with

32.0, 44.1 and 48.0 kHz audio sample frequencies

• Soft mute by means of a cosine roll-off circuit selectable

via pin MUTE or the L3 interface

• dB linear volume control with 1 dB steps from 0 dB to

−60 dB and −∞ dB

• Bass boost and treble control in L3 control mode

• Interpolating filter (fs to 128fs) by means of a cascade of

a recursive filter and a FIR filter

• Third order noise shaper operating at 128fs generates

the bitstream for the DAC

• Filter stream digital-to-analog converter.

2 APPLICATIONS

• Digital audio systems.

3 GENERAL DESCRIPTION

Available in two versions:

• UDA1350ATS:

– only IEC 958 input to DAC in SSOP28 package.

• UDA1350AH:

– full featured version in QFP44 package.

The UDA1350ATS is a single chip IEC 958 audio decoder

with an integrated stereo digital-to-analog converter

employing bitstream conversion techniques.

A lock indication signal is available on pin LOCK indicating

that the IEC 958 decoder is locked. This pin is also used to

indicate whether PCM data is applied to the input or not.

In the event non-PCM data has been detected, the device

indicates out-of-lock.

By default the DAC output and the data output interface

are muted when the decoder is out-of-lock. However, this

setting can be overruled in the L3 control mode.

2000 Mar 29

3

Share Link: