SAA7282

` Full EBU NICAM 728 specification decoder
` Microcomputer controlled via I²C-bus
` Automatic decoding and output configuration depending upon transmission:
   digital stereo
  digital mono and data
   2 independent mono signals
` On board RAM for de-interleaving and 10 to 14-bit word expansion
` Automatic mute function which silences the digital data and switches to FM sound (if valid) when error rate exceeds user definable limit
` User mute function (MUTE pin) to enable user to perform muting to their own software algorithm if required, or to simply silence the output
` 4 times over-sampling digital filter
` Selectable digital de-emphasis
` 256 times over-sampling Noise Shapers
` Fully integrated 1-bit DACs
` Integrated switching networks allowing selection between NICAM Sound, FM Sound or external "Daisy-Chain" input
` Digital Audio Interface conforming with EBU/IEC 958
` I²C-bus transceiver enabling a master device to read
   status information
   error count byte
    additional data bits
   and write:
   switch control codes
    decoder control
    upper and lower error rate limits.

Notes
1. All V_DD and V_SS connections must be made externally to the same power supply.
2. Electrostatic handling is equivalent to discharging a 100 pF capacitor via a 1.5 k series resistor with a 15 ns rise time.
3. 1000 V V_SSAL pin.

Performing all digital decoding functions for a NICAM 728 digital stereo sound system, the SAA7282 is a highly integrated CMOS circuit which only requires a DQPSK (Differential Quadrature Phase Shift Keying) demodulator (TDA8732) and minimum external components to achieve a full NICAM solution.

The SAA7282 may also be interfaced to other DQPSK demodulators.