What is AD5201 used for?
The AD5201 is used to change the exciting current for different type of RTD to
generate a proper span to cover most of the dynamic range of AD7193 to get a
better system performance. For thermocouple, it could adjust the common-mode
voltage of thermocouple but usually, the common-mode voltage of thermocouple
would be fixed at the mid-scale of the power rail on ADC part.