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Part Number: DRV5055
What are the required location tolerances ( x,Y) from the center of magnet, for this sensor to work on a PCB board?
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Since the DRV5055 is a linear Hall effect sensor (outputs a varying voltage based on the strength of the magnetic field), the location tolerances depend significantly on your system design, accuracy requirements, and the magnet shape/size itself. Essentially, when the magnet is misaligned from your expected position, the output voltage will be a little different than the expected value. This will cause an accuracy error in your system, which may or may not be ok, based on your requirements.
If your accuracy requirements are higher then your mechanical tolerances, it is often possible to calibrate the output voltage to the mechanical position to improve accuracy.
Mitch M, TI Sensing Products Applications Support
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In reply to Mitch M:
Thank you for the reply. Do you have any study done, how the Mechanical position in X, Y Vs % of Voltage change?.
In reply to Vandana Vavilikolane:
We do not have a specific study done because it changes so much based on the setup/magnet. I recommend using a magnetic calculator or simulation tool to see how the magnetic field would change based on your specific system. Then, once you know the change in magnetic field, you can determine the change in the output of the device.
Here is a link to a fairly simple free magnetic field calculator: https://www.kjmagnetics.com/fieldcalculator.asp
Note that with this calculator, you'll want to look only at the value of Bx or By based on the direction you are sensing in, not the total magnetic field labeled "Magnetic Field Strength"
If you need more than a simple calculator, you can use the free 2D simulation tool FEMM, found here: http://www.femm.info/wiki/HomePage
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