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TAS5805M: Audio

Kenta Yamada
Prodigy 190 points

Part Number: TAS5805M

Hi team,

In no input, we found around 20kHz noise on our application.

FFT

and we input sin 1kHz wave at -60dBFS volume.

The noise appear on the waveform.

What could be the cause of such noise?

Best regards,

K. Yamada

  • 0
    TI__Guru 63310 points

    Hi Kenta

        With very high possibility, this noise is coming from the power source. Let them to check the PVDD voltage, find whether there's a 20KHz noise.

        Also maybe their output LC filter's resonance frequency is happened to be 20KHz, but it is rarely seen. Let them also check it.