For the first RTD measurement, set the register values:
- Select multiplexer settings for AINP and AINN to measure leads 2 and 3 of the first RTD
- Enable the PGA, set gain to desired value
- Select data rate and digital filter settings
- Select reference input to measure RREF for ratiometric measurement
- Enable the internal reference (the IDAC requires an enabled internal reference)
- Set IDAC magnitude and select IDAC1 output pin to drive lead 1 of the first RTD
For the second RTD measurement, set the register values:
- Select multiplexer settings for AINP and AINN to measure leads 2 and 3 of the second RTD
- Set IDAC magnitude and select IDAC1 output pin to drive lead 1 of the second RTD
For the third RTD measurement, set the register values:
- Select multiplexer settings for AINP and AINN to measure leads 2 and 3 of the third RTD
- Set IDAC magnitude and select IDAC1 output pin to drive lead 1 of the third RTD
For the fourth RTD measurement, set the register values:
- Select multiplexer settings for AINP and AINN to measure leads 2 and 3 of the fourth RTD
- Set IDAC magnitude and select IDAC1 output pin to drive lead 1 of the fourth RTD