Hi Wu Thank you for your reply. The VDD voltage is continuously keep 3.3V when this 3.8V is come to the analog input. Because that circuit can consume more 120uA always. And my opinion also same with you because datasheet recommend is +/-0.3V * +/-10mA = +/-3mW but our condition is 0.8V * 0.12mA = About 0.1mW Ofcourse until now we didn't find any single demaged ADC from customer. (We used at least 2,000 pcs ADC) Me and customer just want to hear your opinion. I appereciate Mr.Wu. If I have something more to inquiry to you, after discussion with custmer, I'll tell you
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