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DRV5056-Q1: How can i get the Resolution from this Sensor

Tianhong Wu
Prodigy 10 points
Part Number: DRV5056-Q1
Other Parts Discussed in Thread: DRV5056

Hallo, i need the resolution in unit T or nT from this Sensor but i didn't find that in Data Sheet. Can u tell me how can i get this Parameter?

  • 0
    TI__Mastermind 21630 points

    Tianhong,

    Thank you for your question.  DRV5056 is an analog device, and so there is no LSB size here.  Instead, you will be limited by the noise of the device

    Based on the input referred noise, you would expect to be able to measure changes in magnetic flux density greater than 0.12 mT when operating at 5V (or 0.2 mT at 3.3V).

    You can reduce this somewhat by adding a filter to the output, but should be aware that this could also impact your maximum operating frequency in systems with fast moving magnets.

    Another option  if you need tighter precision is to average multiple samples. This would allow  you to be able to reduce the noise impact on your measurement as well.