DESCRIPTION The DEM-DAI1704 is a complete evaluation fixture for the PCM1704 (24-bit, sign-magnitude digital-to- analog converter) and the DF1704 digital interpolation filter. The demonstration board includes all the neces- sary power supply and interface connectors, as well as analog signal conditioning circuitry for the DAC out- puts. An on-board S/PDIF receiver provides an indus- try-standard interface to audio measurement systems and commercial audio equipment.