USB Tube DAC chip PCM1798
USB Tube DAC – DAC chip using current-fever PCM1798 (standard Russian EH 12AT7 tube)
USB Tube DAC DAC-current-chip PCM1798 + fever tube (with R-type transformer)
The DAC production of complete high-quality parts:
Nikon FW capacitors, WIMA capacitors, Sanyo OS-CON solid capacitors, BP MUSE capacitor, KOA colored ring of high precision metal film resistors, BB company OPA604AP op amp, BB PCM1798 DAC decoding the company, BB company PCM2707 USB input, power chip AMS1117-3.3 , AMS1117-5, MC7808, LM337, LM317, KA7806; Russian original EH 12AT7 tube …..
-USB input with a BB company PCM2707.
-DAC with current mode PCM1798 BB Company
- Enter all the way analog, two digital (optical and coaxial)
- Analog output can be selected through the tube or directly from the op amp buffer I / V converter output
- Power regulator with multiple power supply voltages, respectively, of each module, with a few stars power chip: AMS1117-3.3, AMS1117-5, MC7808, LM337, LM317, KA7806
-I / V converter with two NE5532P two OPA604AP
- Required power is :0-8V (2A) ,0-60V (0.4A), 15V-0-15V (0.4A),
- Board size: 166mmx118mmx55mm
Note: This product is HIFIDIY on behalf of the packaged product, the generation of debugging equipment to complete assembly of finished products from the professionals!
The DAC function is purely a single USB DAC, this approach is not to introduce more complex features and lines, the main channel for the USB interface to enter the PCM2707, I2S and then directly enter directly through the PCM1798, and then through four separate amplifier IC for I / V conversion, set the tube buffer stage output location, the buffer to adjust the sound level main effect, can choose whether to use welded tube buffer stage, the power for the specially designed multi-channel power supply, the lines simple and clear, flow-line design.
The DAC core framework uses PCM2707 PCM1798, which the core D / A chip-based DAC chip Senior BB PCM1798.
The DAC also provides two digital signal outputs: one coaxial light all the way to solder.
