Hi Joseph, I changed the gain from 000 to 001, gain of 1. And CHnSET set to 0x10 for testing the noise and CHnSET set to 0x11 when I do measurements. I have checked my board but everything is same us the other channels. No, I am not able to measure using this channel, no matter the input the output remains the same noise. I am using a single ended power supply with AVDD=5V and AVSS=0V, the INxN is tied permanently to reference voltage Vref=2.5V, this reference voltage is either generated by the ADC's Op-amp or using a voltage divider, selected by jumpers. Thus the common mode voltage is 2.5V. Mahlet
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