Hi Julien, Thanks for the update. A few more questions. In your design are you DC coupled to the analog inputs of the ADC on any or all the channels with an amplifier? How stable are the power supplies at the AVDD pins at the ADC itself is it 3.300V? If either of these two points are off, you could see variance in the internal reference. If you send over a full set of schematics that would help possible uncover this. Regards, Rob
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