UDA1352HL

General description

The UDA1352HL is a single-chip IEC 60958 audio decoder with an integrated stereo DAC employing bitstream conversion techniques.

A lock status signal is available on pin LOCK, to indicate when the IEC 60958 decoder is locked. A PCM detection status signal is available on pin PCMDET to indicate when PCM data is present at the input.

By default, the DAC output and the data output interface are muted when the decoder is out-of-lock. However, this setting can be overridden in the L3-bus or I²C-bus modes.

The UDA1352HL in package LQFP48 is the full featured version. Also available is the UDA1352TS in package SSOP28 which has the IEC 60958 input only to the DAC.

Features

1.1 General

• 2.7 to 3.6 V power supply
• Integrated digital filter and Digital-to-Analog Converter (DAC)
• 256f_s system clock output
• 20-bit data path in interpolator
• High performance
• No analog post filtering required for DAC
• Supported sampling frequencies of 28 up to 55 kHz.

1.2 Control

• Controlled by either static pins, I²C-bus or L3-bus microcontroller interfaces.

1.3 IEC 60958 input

• On-chip amplifier converts IEC 60958 input to CMOS levels
• Lock status indication at pin LOCK
• Pulse Code Modulation (PCM) input signal status indication at pin PCMDET
• Right and left channels each have 40 key channel-status bits available via L3-bus or I²C-bus interfaces.

1.4 Digital sound processing and DAC

• Automatic de-emphasis when using IEC 60958 input with audio sample frequencies (f_s ) of 32.0, 44.1 and 48.0 kHz
• Soft mute using a cosine roll-off circuit selectable via pin MUTE, L3-bus or I²C-bus interfaces
• Left and right independent dB linear volume control having 0.25 dB steps from 0 to -50 dB, 1 dB steps to -60, -66 and -∞ dB
• Bass boost and treble control in L3-bus or I²C-bus modes
• Interpolating filter (f_s to 64f_s or 128f_s ) using cascaded recursive and FIR filters
• Fifth-order noise shaper (operating either at 64f_s or 128f_s ) generates the bitstream for the DAC
• Filter Stream DAC (FSDAC).

Applications

• Digital audio systems.

Block diagrams/pinning

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Disclaimers

• General product disclaimer
• Quality and reliability disclaimer