I'm attempting to design calibration for mass production on a newly designed product. The product is designed to use sub 1mA, so any digital calibration is unlikely.
An example of this would be in the following scenario (note: this is not the actual design):
What methods are available to calibrate each of the input resistors ranges on this circuit that are cost and power sensitive?
My own research/input: The only thing I can see as a feasible option is trimmer potentiometers and perhaps using automation to do the calibration. But this seems like a time-consuming process and the fact that the potentiometers can move over time and have significant temperature drift. I have seen some people put adhesive on the trimmer but then in future, the device can be calibrated which is required.
I don't know if there are any methods for digital potentiometer setting which can be powered off and remember its position?