With the AD7708, we are experiencing a strange behavior with sudden changes of temperature.
If there is a rapid cooling of the device down to -40 Celsius, it happens that a reading is completely erroneous.
This behavior happened when verifying the robustness of our product in thermal shock.
We have been able to reproduce the problem with a can of spray freeze.
I have read this in the datasheet for the calibration:
“It should also be noted that to optimize@@@
calibration accuracy, all AD7708/AD7718 ADC calibrations
are carried out automatically at the slowest update rate with
Does it mean that the SF must be set to 255 to avoid this error ?