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
Miscellaneous:
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