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Is ADC built-in calibration affected by the power supply noise?

Question asked by Huang Yicheng on Aug 7, 2017
Latest reply on Aug 7, 2017 by Vangelis Fortounas

According to the datasheet, there will be a calibration code after the calibration. Is this calibration code the offset error? If it is, where does the zero input used by the offset error come from? Is it taken from the ground? I would like to know if this calibration code will be affected by power supply noise.