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Original question:

PCM1754: VOUT-L、VOUT-R have noise, but cut off PIN1, PIN2, VOUT-L、VOUT-R noise are disappear.

PCM1754: VOUTx Capacitor

Xizi Luo
Prodigy 665 points

Part Number: PCM1754

Hi team,

May I pls know why VOUTx need a capacitor before post LPF? Is ceramic capacitor proper? Is 10uF the only value? 

Thank you! 

  • 0
    TI__Mastermind 35731 points

    Hi Xizi,

    usually we put a DC blocking cap at the output to block the DC component and then filter it. The capacitor and size that you see is recommended and I have seen other values or types other than our recommendation were used. 

    Regards,

    Arash