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DSD1792a: operating in DSD/monaural mode

Alain Chambron1
Prodigy 170 points
Part Number: DSD1792A

Hello,

I have 2 questions regarding operating the DSD1792a in DSD mode:

- The datasheet stipulates that "The system clock can be removed after setting the register to the DSD mode" (Figure 40.):
  Does this mean that the converter relies solely on DBCK to perform the conversion?
  Do the same recommendations for SCK phase jitter and noise apply to DBCK then?
  Is it OK to leave SCK on? Is there a preferred rate for it?

- Operating the chip in DSD and monaural, what is the best practice with the unused input DSD pin: ground it, leave it floating or connect it to the signal?

regards,

Alain

  • 0
    TI__Guru 57800 points

    Hi, Alain,

    For the DSD1792A, the SCK can be removed after the part has been configured in DSD mode because as you mention, the internal clocks will be driven from DBCK.

    For mono applications, you can tie the unused channel to GND.

    Best Regards,

      -Diego Meléndez López
       Audio Applications Engineer