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PCM1822-Q1: Function of the AREG and DREG Pins

Paul Lai
Prodigy 20 points
Part Number: PCM1822-Q1

Tool/software:

Hi TI teams,

       I have a question about the AREG and DREG Pins of the PCM1822-Q1.

       I use external voltage supplies to AVDD and IOVDD pins. If I do NOT use AREG and DREG pins as power supplies, could I remove all decoupling capacitors on these 2 pins? (That is, I do not connect anything on these two pins.) Thanks.

Best Regards,

Paul 

  • 0
    TI__Mastermind 18870 points

    Hi Paul,

    AREG and DREG internally regulate analog and digital circuitry. These pins are crucial for stabilizing the ADC's internal operation, reducing noise, and ensuring proper performance. The decoupling capacitors are required make sure the power rails are stable for proper conversions