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Recommended design for measuring induced magnetic fields?

Vik V
Prodigy 10 points
Other Parts Discussed in Thread: DRV5053

Hi,

I'm looking to measure some pulsed magnetic waves being generated by an electric coil. Basically I have a driving circuit which pulses into a coil every few seconds that incudes a magnetic field. My pulse rise time is fast at 50us and magnitude is pretty small <1T. There are several TI Hall effect sensors. Which is recommended for this application, and is there a sample schematic for how to hook it up for this? 

Thanks! 

  • 0
    TI__Mastermind 32290 points

    Hello Vik,

    Placement is key as most of our sensors only sense in one axis.  We have a few different hall sensors and Flux-Gate sensor.  Our Flux-Gate sensor has a limited range upto 2mT so that may not be the on you need.  Our hall sensors have more variety in options.  https://www.ti.com/sensors/magnetic-sensors/linear-hall-effect-sensors/products.html.  The issue with these devices is they are normally meant to measure a field from a magnet and have they sensitivity drift to match a magnet and their bandwidth is typically low.  If you are only working at room this is not an issue but if you are changing temperature and expect precision numbers this could be an issue.  The DRV5053 does not drift but this device has lower initial accuracy and varies from device to device.  I am not the expert of the Hall devices we have available so if this is you. The other issue could be the bandwidth of these devices.  If you would like just to have a switch then our 30kHz sensors could work.