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DIX9211 sample rate question

Other Parts Discussed in Thread: DIX9211, PCM5122, PCM5102, DIX4192

Hi everyone,

I am using the DIX9211 successfully in a project where the S/PDIF receiver and transmitter are used. No issues or limitations here. Now I am considering using the DIX9211 in a different project, where the routing possibilities are of importance.

Question: Is there a chance to route 384kHz, 32bit I2S through the chip? The signal would enter the DIX9211 at the MPIO_C port and should leave it on the main port. The SCK clock is not really needed, just I2S.

It puzzles me why the datasheet limits the use to 216 kHz, as no signal has more than 24,576 MHz and no processing is needed.

Regards

Ivo Linnenberg

(LINNENBERG-AUDIO)

  • Hello Ivo,

    Unfortunately since the part is only spec'ed to route a max of 216kHz we can't guarantee operation for anything higher than that including 384kHz. the LR clk module is designed specifically for these frequencies so as you push higher and higher the timing would lose its integrity and we couldn't be certain that it would work.

    Why is it that you are using such a high frequency rate?

    Best regards,

    Nate

  • Hi Nate,

    thank you for your swiftly reply. We do DAC’s and headphones amplifiers. Market demands forces us to offer products capable of at least 384kHz over USB. For a cost sensitive project I am looking for a chip including S/PDIF circuitry and switching between USB and S/PDIF inputs. The DAC chip will be the PCM5102 or PCM5122.

    It looks like some glue logic is inevitable, since the DIX4192 poses the same problem. Besides, I like the analog PLL approach of the DIX9211.

    Thanx once again.

    Regards

    Ivo Linnenberg

    (LINNENBERG-AUDIO)