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PCM6260Q1EVM-PDK: How to design AC couple capacitor?

Jass Jin
Intellectual 2255 points
Part Number: PCM6260Q1EVM-PDK

Hi Team,

My customer found that the AC couple capacitor is 1uF in PCM6260 EVM's schematic, but the BOM list show the capacitor is 22uF and the package is 1210(really huge)

Which one is the correct value?

My customer use 4.7kohm bias resistor, from input resistor calculator, the total input resistor is around 4kohm, combined with 1uF, the -3dB frequency is 40kHz. So the 1uF can be alright is MIC system, right?

Thanks a lot!

  • 0
    TI__Mastermind 23470 points

    Hi Jass,

    1uF is the correct value for AC coupled mode, EVM BOM list appears to have a scribal error

    Jass Jin said:
    My customer use 4.7kohm bias resistor, from input resistor calculator, the total input resistor is around 4kohm, combined with 1uF, the -3dB frequency is 40kHz. So the 1uF can be alright is MIC system, right?

    Correct.

    Best Regards,