CZAP Digital Board


Main features:
  • Four transformer isolated 75Ohm BNC coaxial SPDIF inputs with linear amplification

  • One optical TOSLINK input

  • I2S and DSD (SDIF) inputs via DB25 connector with optional termination

  • I2S input via internal header for optional USB and HDMI connectivity

  • DSD over PCM (DoP v1) support at all inputs

  • Supported sampling rates:

    • SPDIF&TOSLINK: 44.1/48/88.2/96/176.4/192 kHz

    • I2S: 44.1/48/88.2/96/176.4/192/352.8/384 kHz

    • DSD: 64/128 Fs

  • Multistage input signal switching for maximum isolation between active channels

  • Blank SPDIF synchronization output

  • Word clock synchronization output

  • Trigger in and out

  • Galvanically isolated audio and control data output

FPGA audio processing:
  • Single stage upsamling to 352.8/384kHz for all input sampling rates

  • 3dB inter-sample peaking headroom

  • Four selectable LPCM upsampling filter characteristics

  • Supports asynchronous FIFO buffering for isolation of clock domains

  • High quality DSD to PCM conversion to 352.8kHz

  • Four selectable DSD to PCM conversion filter characteristics

  • 32 bit microprocessor for system control

  • RS232 via DB25

  • Connection for display and front control panel

  • Low-noise discrete power regulators for clock and output circuits

  • Dual power input with isolated standby control