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PCM1754: PCM1754-Q1 sound noise

LeoChen
Intellectual 560 points
Part Number: PCM1754
Other Parts Discussed in Thread: TAS5411-Q1

Dears,

PCM1754-Q1 has sound noise can be hear, but can't be checked by oscilloscope,how to solve it?

My customer's product signal chain:MCU->PCM1754-Q1->TAS5411-Q1

  • 0
    TI__Guru 53983 points
    Hi Leo,

    There are a few things that can result in unwanted noise. Could you share your schematic?

    I would also check to see if there is a significant noise or ripple in your power supplies for both the PCM and TAS device. This can be done with an oscilloscope. I would also check to to see if you have any low-level oscillation on the output, to see if the noise is random.

    Thanks!