My DAC for the Raspberry Pi

[usul27]

I started my DAC project for the Raspberry Pi. The first version runs as an I2S slave device and already works very well. On-chip PLL automatically syncs to different clock frequencies. Analog power is supplied by an additional low-noise voltage regulator.

HiFiBerry Mini | Crazy Audio

I will do more measurements next week.

Version 2 is in design phase. It will be a bit more complex:
- onboard oscillator, runs as I2S master
- DAC chip with I2C control (volume control, sample rate, minimal DSP postprocessing)

Regards
Daniel

[kumori]

Nice one!
I am curious how far this will develop.

Which DAC did you use?

[usul27]

The DAC chip is a PCM5102. Version 2 will use a PCM5122 which will act as master for all clocks.

[usul27]

I did some tests with RaspyFi today. It works like a charm :-) I can even play 192/24 FLAC files without any problems :-)

[nuryev]

Hi,
Are these for sale as kits or assembled?

[usul27]

Not yet, but in about 2 months. I will also test another DAC/voltage regulator combination and see, what sounds best. Most likely there will be a kit with all SMD components soldered. Some soldering is needed, because the P5 header has to be soldered on the Raspberry.

[Turbon]

Originally Posted by usul27

I did some tests with RaspyFi today. It works like a charm :-) I can even play 192/24 FLAC files without any problems :-)

So, we have a working USB platform then?

Brgds

[smallangryboy]

Nice, very interested in this project, any evaluation boards available prior to launch?

As an aside could you supply the board without phono sockets?

[usul27]

@smallangryboy: There are 2 eval boards of the prototype, these are already reserved for 2 guys. There might be another 2 eval boards of version 2. The phono sockets will be parts of the kist, however, you do not have to solder them on the board.

@Turbon: This is not a USB DAC, it connects directly to the I2S port of the SoC.

[smallangryboy]

Please put me down for a board.