Dropbox link: https://www.dropbox.com/sh/4dv9l4ox4omcski/AACGc8lBQsVFxR_hUZPPXTnKa?dl=0
Application note attached below.
Example clock buffer chip: https://www.onsemi.com/download/data-sheet/pdf/nb3l553-d.pdf
DAC boards need to be at least 4-layer. That was even true for best performance with 16-bit dacs.
How do you plan send audio data from the SBC or PC to to the ADAU? SPDIF?
Will you configure the SBC to send 96kHz digital audio to the ADAU? If not, why not?
Application note attached below.
Example clock buffer chip: https://www.onsemi.com/download/data-sheet/pdf/nb3l553-d.pdf
DAC boards need to be at least 4-layer. That was even true for best performance with 16-bit dacs.
How do you plan send audio data from the SBC or PC to to the ADAU? SPDIF?
Will you configure the SBC to send 96kHz digital audio to the ADAU? If not, why not?
Last edited:
Thank you for gerbers, i will research it!
DAC boards need to be at least 4-layer. That was even true for best performance with 16-bit dacs.
understand, i dont use it
DAC boards need to be at least 4-layer. That was even true for best performance with 16-bit dacs.
SBC i2s -> ADAU i2s -> DAC
yes, SBC i2s configured to 96kHz
If coming from SBC directly in I2S, the you probably use an I2S isolator chip to keep SBC ground noise out of your dac system. Also may not be any benefit to doing SRC to 96kHz in the SBC? if not needed it may only add some distortion for nothing?
Also, if you are going send your dac clock to ADAU, you should use a buffer otherwise clock quality almost certainly will be degraded at dac chip.
Another thing is what is the minimum clock frequency for the dac and or the ADAU to support 96kHz? Are they the same?
Maybe helpful to take a look at: https://www.diyaudio.com/community/threads/phase-noise-in-ds-dacs.387862/post-7063953
Also, if ADAU is going to be doing the ASRC then you should turn off dac ASRC and run the dac chip synchronously with the ADAU output, right?
Also, if you are going send your dac clock to ADAU, you should use a buffer otherwise clock quality almost certainly will be degraded at dac chip.
Another thing is what is the minimum clock frequency for the dac and or the ADAU to support 96kHz? Are they the same?
Maybe helpful to take a look at: https://www.diyaudio.com/community/threads/phase-noise-in-ds-dacs.387862/post-7063953
Also, if ADAU is going to be doing the ASRC then you should turn off dac ASRC and run the dac chip synchronously with the ADAU output, right?
Isolator chip example (ADUM1400): https://www.analog.com/media/en/technical-documentation/data-sheets/ADuM1400_1401_1402.pdf
using an Isolator is a difficult task in this devce, since it is intended for a car using, and in general I do not see the need to use it in this case