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TLV320AIC3104: analog power supply from digital power supply

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Replies: 2

Views: 81

Part Number: TLV320AIC3104

Hello,

In TLV320AIC3104EVM, analog 3.3V is made from 5V by REG1117. When we made analog supply from digital 3.3V, I think ferrite beads like BLM15AG100SH1 is enough for isolate digital noise.

Would you advise me above?

Best regards,

Toshihiro Watanabe

  • Hello Toshihiro,

    This is a good question and unfortunately I don't have an answer at this moment. Let me discuss this with a codec expert and I will get back to you as soon as possible. 

    Regards,

    Aaron

  • In reply to Aaron Estrada51:

    Hello Toshihiro,

    The ferrite beads will certainly help reduce the noise but it will not completely filter out the digital noise. The most ideal case would be to provide a separate analog supply using an LDO.

    Regards,

    Aaron

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