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  • TI Thinks Resolved

DRV425EVM: drv425

Prodigy 10 points

Replies: 1

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Part Number: DRV425EVM

Is it possible to get higher resolution readings by setting the range to 50uT


what accuracy can drv425 can supply in 50uT max. scale 

is it possible to sense 0.1 nT changes in earth magnetic field?

  • Hello Yunus,

    I believe noise will be one of the biggest issues. I think even with filtering the resolution you are looking for is not possible. For example at 100Hz you could see up to 140nT p-p. You can verify this with our EVM but the conditions below will also mater.

    Also this would mean that there is nothing surrounding the device. At this level you even need to consider changes in the supply current and anything surround the device. Also components such as capacitors and resistors could have material that has a higher permeability than that of air which would disturb the field as well.

    Best Regards,

    Javier Contreras, TI Sensing Products Applications Support

    Getting Started with Current Sensing Video Training Series

    All information in this correspondence and in any related correspondence is provided “as is” and “with all faults”, and it is subject to TI’s Important Notice (http://www.ti.com/corp/docs/legal/important-notice.shtml).

     

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