The DAC
The TauDAC-DM101 is a ultra-high performance I2S DAC module for the Raspberry Pi. It uses two outstanding WM8741 DAC-chips in dual-mono mode and ultra-low phase noise clocks. The DAC-Chips and the clock oscillators are driven by separate, ultra-low noise, high PSRR power supplies.
The board complies with the Raspberry Pi HAT (Hardware Attached on Top) requirements — including ID EEPROM support, display flex cutout and back powering.
Features
- Dual Mono Topology — two WM8741 DACs in dual differential mono mode
- 128dB SNR @ 48kHz
- -100dB THD @ 48kHz
- Differential analogue voltage outputs
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Supports word lengths up to 32-bits and sampling rates up to 192kHz
- Ultra-low phase noise oscillators
- Ultra-low noise, high PSRR linear regulators
- Separate power supplies for the DACs, the master clock and the Raspberry Pi (back powers the Raspberry Pi)
- High quality (tantalum) decoupling capacitors
- Raspberry Pi HAT (A+/B+/2/3/4) compliant
- Designed and manufactured in Germany
The Output Stage
The TauOUT-TP101 is a high performance passive output stage for the TauDAC-DM101. The module features Lundahl transformers for summing the differential outputs of the DACs as well as for galvanic isolation.
Features
- High-level Lundahl line output transformers:
- galvanic isolation between the left and the right channels as well as between the DAC and the power amplifier
- greatly improves immunity to external noise sources
- High-quality massive RCA connectors:
- non-magnetic, eutectic brass, rhodium over silver plate
- Shielded DC power connector:
- main power supply for the Raspberry Pi and the DAC
- The RCA and the DC power connectors are at the same side as the USB and Ethernet connectors of the Raspberry Pi — the assembly can be build into a case with all required connectors at back panel.
The Power Supply
The TauOUT board provides a DC power jack. You need a single 6.3 – 9.1VDC power supply to power the Raspberry Pi and the TauDAC through the TauOUT board. The power supply should be able to provide at least 1.5A. The DC power jack center pin has a diameter of 2 mm. It is not necessary (and not recommended) to connect an external power supply via USB to the Raspberry Pi.
Recommended Power Supply Units
- BOTW P&P ECO 9V from Sbooster
- iPower 9V from iFi Audio
How to get a TauDAC?
Stay tuned… and leave a message.
This is a hobby project.
Please note that occasionally it might take a couple of days until I get the chance to reply.