MC33772:zero drift

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MC33772:zero drift

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Wenjing
Contributor I

Dear friend

    Our 33772 has a zero drift of 18mv when collecting voltage with GPIO0。What causes it?I need help,Thanks.

     best wishes                                                                                                                                   Wenjing

                                                                                                                                                            2024.8.15

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TomasVaverka
NXP TechSupport
NXP TechSupport

Hello Jing,

How is your GPIO0 configured and have you tested other GPIOs?

To diagnose the exact cause, consider performing a detailed analysis of the circuit, including measuring the actual input signal, checking the stability of the reference voltage and reviewing the PCB layout for potential issues.

BRs, Tomas

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Wenjing
Contributor I

Dear Tomas:

    My  GPIO0 configured" BCC_GPIOX_AN_IN_ABS_MEAS",ALL GPIOS have the same status,I can show the PCB layout for you. Thanks!!!!

best wishes

                                                                                                                                                         WENJING

                                                                                                                                                         2024.8.16

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