I was wondering if there is any data available for the input voltage offset of an AD4530-1 versus change in %RH?
The datasheet specifies an input bias current error when the %RH changes, but nothing on input voltage offset.
It seems to me that it is very simple. The influence of humidity on the bias current is described in detail in the datasheet. As for the offset voltage, then, formally, this parameter is defined as the equivalent voltage that should be applied from an external source between the inputs to get a zero voltage at the output. Since the voltage source has a negligible output resistance, the conductive moisture film is not able to shunt it.
Therefore, the effect on the offset voltage is not describes.
I hope that this help you.