Thanks for the information Mudit. The minimum gain of ADC1A and ADC1B is 4. With the internal 1.25V VREF, that means your full-scale input signal needs to be <=1.25V/4 = 0.3125V. In order to fit the 4-20mA signal within that range, you will have to use a <= 0.3125V/20mA = 15.625Ohm load resistor to convert the 4-20mA signal into a voltage signal. Regards, Joachim Wuerker
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