The MAX31865 is an easy-to-use resistance-to-digital converter optimized for platinum
resistance temperature detectors (RTDs). An external resistor sets the sensitivity
for the RTD being used and a precision delta-sigma ADC converts the ratio of the RTD
resistance to the reference resistance into digital form. The MAX31865’s inputs are
protected against overvoltage faults as large as ±45V. Programmable detection of RTD
and cable open and short conditions is included.