UDA1351TS

General description

Available in two versions:

• UDA1351TS:
  -only IEC 958 input to DAC in SSOP28 package.
• UDA1351H:
  -full featured version in QFP44 package.

The UDA1351TS is a single chip IEC 958 audio decoder with an integrated stereo DAC 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. When non-PCM data is 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.

Features

General

• 2.7 to 3.6 V power supply
• Integrated digital filter and Digital-to-Analog Converter (DAC)
• Master-mode data output and input interface for off-chip sound processing
• 256f_s system clock output
• 20-bit data path in interpolator
• High performance
• No analog post filtering required for DAC
• Support sampling frequencies from 28 kHz up to 100 kHz
• The UDA1351TS is fully pin and function compatible with the UDA1350ATS.

Control

Controlled either by means of static pins or via the L3 microcontroller interface.

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; when non-PCM is 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).

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 (f_s to 128f_s) by means of a cascade of a recursive filter and a FIR filter
• Third order noise shaper operating at 128f_s generates the bitstream for the DAC
• Filter Stream DAC (FSDAC).

Products/packages

All type numbers in the table below are discontinued. See the table Discontinued information for more information.

Quality/reliability/chemical content

All type numbers in the table below are discontinued. See the table Discontinued information for more information.

Quality and reliability disclaimer

Discontinued information

Applications

Digital audio systems.

Block diagrams/pinning

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Disclaimers

• General product disclaimer
• Quality and reliability disclaimer