How to calibrate current measurement in s12z microcontroller (I need to calibration procedure)Please help
Could you elaborate on your request?
Which S12Z derivative do you use?
I am using mm9z1j638 need temperature and current calibration procedure for this controller
the calibration is a quite complex process and the MM9Z1_638 device allows different options on how to use it, e.g. automatic temperature gain compensation or manual gain compensation using chip temperature result and lookup tables. Also the acquisition channel configuration used during operation has to be considered.
The system calibration should be performed as an incremental (incremental to NXP provided device calibration data) calibration. The basic steps are:
The following picture indicates which information / data is required to calculate the incremental gain and offset adjustments (gainsteps, offsetsteps).
For a good estimation of the acquisition channels behavior, e.g. a 5-point measurement is suitable. The selection of the individual data points should consider application requirements like:
The picture below shows an example setup for the ISENSE channel compensation:
To discuss further details it might be better to directly discuss your applications needs?
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