i use ad7792 with pt100。
the voltage of pt100 is 0.107V，
7792 setting is REF=3.3v 1/16, ( 0.20625v ) IOUT=1mA，
But it“s readback data is always half of 65536，
It's wrong.I wonder know how.
Can you share your schematic diagram please and register configuration?
Are you also using a ratio metric configuration? If you want to know more about RTD circuits, I would recommend to check CN-0383 (Rev. C) (analog.com) and also download https://www.analog.com/media/en/designtools/calculators/rtd_configurator_and_error_budget_calculator-rel1.0.0.exe
This tool uses a much newer product AD7124 which I also recommend for new designs as it has better performance and more advanced features suitable for RTD sensing application.