TWSDAC-DSD The Well Segmented DAC (DSD) bundle

DSD512 discrete DAC

The TWSDAC-DSD-BNDL is the DSD512 discrete DAC bundle. The bundle includes the following

  1. TWTMC-DRIXO 22.5792 MHz oscillator finished board with crystal
  2. TWTMC-DRIXO 24.576 MHz oscillator finished board with crystal
  3. TWSAFB-LT FIFO buffer finished board
  4. TWSAFB-UI User interface finished board
  5. TWSDAC-DSD discrete DAC finished board
  6. TWRPS-UGL low noise power supply for oscillators finished board
  7. TWRPS-LT-TB transformers bank bare board
  8. TWRPS-LT low noise power supply for FIFO buffer finished board
  9. TWRPS-SS low noise power supply for DSD DAC finished board

See the User Manual of each board for specifications and connections.

The following items has to be sourced to complete the DAC:

  • through hole components to populate the TWRPS-LT-TB transformers bank
  • enclosures for DAC (1) and oscillators (2)
  • SMA terminated coaxial cables to connect oscillators with FIFO buffer


Input format: DSD
Inputs: 4 x selectable inputs
Format: up to DSD512 (DSD256 in RTZ mode)
Architecture: balanced discrete 32 taps FIRDAC
Clock mode: continuous clock
Master clock: 22.5792/24.574 MHz up to DSD512 (DSD256 in RTZ mode)
RTZ: the DAC can work in RTZ (Return to Zero) mode
Output: voltage output 1.4V rms (0.7V RMS in RTZ mode)
Configuration: all settings can be configured one time by USB connection to the Windows
Display: user interface to manage some function on the fly like source selection, dither and to display current sample rate
Master Clock selection: T-switch configuration relay to select the sample rate family instead of
Optical isolation: MCK optical isolated from the FPGA and the micro to avoid
interferences (DATA signals optically isolated DAC side)
External Master Clock: 22.5792/24.576 MHz TWTMC-DRIXO oscillators
No RF: micro controller in standby during listening (no RF interference at all)
Direct clock output: SCK directly from the Master clock (optical isolation) instead of from
the FPGA
Phase noise: very low phase noise outputs (SCK)
Power supply: low noise linear and shunt regulators (without transformers)
Note: all finished boards (without RCA connector and transformers)