Hi Arturo Goche, What do you mean by "voltage differential"? Is that a measured voltage at the ADC inputs, or are you convertring the ADC output code to voltage? Do you have a schematic you can share? Can you try measuring something like a AA battery that should be effectively noiseless and is floating relative to your board ground / power? If the offset is constant, you can always mathematically remove it in software. For example if the offset is the equivalent of an ADC code of 100 (in decimal), and your measured ADC code is 500000 (in decimal), the calculated value would be 500000 - 100 = 499900 (in decimal) -Bryan
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