Q5. Why are the onboard Analog input buffers not required for current measurements AD4111/AD4112?
To enable currents to be measured below 0mA, the Analog input buffers should be disabled for current measurement. This would extend the ADC input range to -0.05V below ground and allows accurate measurements of currents close to and below 0mA. If the measurement range is always above 0mA then input buffers can be enabled but are not required.