What is the proper way to set the offset and sensitivity parameters for Allegro A1362 Programmable Linear Hall Effect Sensor so that TI MSP430 5528 properly digitizes them?
Using observed values of MSP430's digitization, how do I select a sensitivity for the A1362? I am expecting the sensitivity to be around 5-6 mV/G and according to the data sheet the guaranteed range is 4.5-16mV/G
How do I set the steady state value of the A1362 to be around 1.25Volts? The MSP430 digitizes values from 0-2.5Volts, but the A1362 Hall-Effect sensor is bipolar, meaning the voltage increases and decreases. I would need the A1362's steady state value (with no magnet) to be 1.25V to allow for both north and south pole variations.
I know both questions above will require some experimentation with the A1362 Hall-Effect Sensor and magnet in order to determine the exact offset and slope, but I was hoping someone in the community could either point me to a some kind of a tutorial (youtube or guidelines) or give me a general idea of the procedure to do what is described above.
Will the required procedure look anything like steps outlined on pg. 54 here?
My understanding is I will be applying voltage pulses using a standard power supply.
I would greatly appreciate all / any advise as this is my first time doing something like this. Video tutorials would be much appreciated.
Best Answer
The preferred way to set up the Hall Sensor for initial experimentation would be to acquire the evaluation board, and then follow the instructions to use its software for calibration and configuration.
If that is not an option, similar results can be achieved manually, albeit with a bit more effort and some guesswork / empirical data. This is how it goes:
Required parameters:
Once the above parameters are determined, a suggested way to proceed would be:
4.5 - 16 mV/G
, could give a maximum of 4.8 Volts full-scale North-to-South, way more than the MSP430 can handle.That's what I can recall off the top of my head, but if additional details are required, please edit the question accordingly.