ProtoDAC TDA1387 X8 project

[hifinet]

I received a question about using ProtoDAC with SPDIF optical input. I did make a ProtoDAC using this SPDIF to I2S DIR9001 board for coaxial SPDIF input up to 24/96. The board I received looked like the one in the link below. The board also has optical input. It works very well with coax, never used it with optical, but it should work as designed. There are three sets of jumpers on the board. One is for the type of I2S. Select 24 bit, I2S. The other is for coax or optical input. And the third was for SCK. I think based on Figure 3 page 10 of the datasheet, you want 512fs, which has lowest jitter. I soldered I2S jumper wires from the DIR9001 board directly to the GPIO 12, 35 and 40 pads (header omitted). The DIR9001 received power from ProtoDAC, which was powered from the 5V/GND pads between the RCA jacks.

Other possible SPDIF to I2S boards use WM8804 or WM8805 (up to 192k coax).

DIR9001

DIR9001 connections to ProtoDAC