ADC Reading

[EmbeddedEnjoyer]

I am trying to configure ADC on the NXP S32K144EVB and I am using the ADC example and editing that. I am successfully getting a reading from a sensor I am using but I find that when I switch from using the USB as the power source to the barrel jack as the power source, I get a difference in reading. Why is this happening and what can I do about it?

[Robin_Shen]

Hi

Please check the difference in VREFH voltage when using J7 and J16 power supply.

If there is no difference in the VREFH voltage, then check the voltage difference at the sensor connection to the ADC pin.

Best Regards,
Robin
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[Robin_Shen]

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