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IMX7D ADC offset issue

Question asked by Franky Hsu on May 1, 2017
Latest reply on May 2, 2017 by igorpadykov

Hi

 

We measure the ADC input voltage and read the ADC value in kernel. The input voltage is changed by thermal NTC. We found we will have a voltage difference about 0.032~0.048V between ADC read and voltage measurement. How to decrease difference between them? The drift seems to be too much.

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