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DRV5053-Q1: Magnetic Characteristic sensitivity range

Kurt Jenney
Prodigy 10 points
Part Number: DRV5053-Q1

I'm interested in using the DRV5053PAEDBZTQ1 hall effect sensor, but am curious why the Magnetic Characteristics table provides a large range of magnetic sensitivity compared to the Figure 4.

The Magnetic Characteristics reports -35 to -10 mV/mT sensitivity over free air temperature.

Figure 4. Sensitivity vs Temperature shows the minimum and maximum sensitivity over temperature to be -22.5 and -24.5 mV/mT respectively.

What drives the large -35 to -10 mV/mT sensitivity reported?  Is this part-to-part variation that may be calibrated out by the end user?

  • 0
    TI__Genius 17425 points

    Hey Kurt,

    Thanks for posting on the sensing forum!

    The Magnetic Characteristics section takes into consideration part to part variation across devices due to manufacturing process. While the data shown in figure 4 is meant to demonstrate the variance in magnetic sensitivity due to temperature. So a device with a sensitivity around ~-23mV/mT was tested for sensitivity changes across the temperature range.

    This means that if you obtain a device that has a sensitivity of -30mV/mT you can expect there will be very little changes in sensitivity due to temperature in the DRV5053PA version. So yes, you should be able to calibrate out the differences in sensitivity since it is due to part to part variation.

    I hope this answers your question!

    Best,

    Isaac

  • 0 in reply to Isaac Lara
    Prodigy 10 points

    Thank you, this solves my problem!