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DRV5055: Can this be used for current sensor

Part Number: DRV5055

I want to design a 0-500A current sensor with this IC. Our sensor core can produce 140mT @500A and with the 12.5mV/mT sensitivity option, I can get a bipolar sensing range of  0.7-4.2V. I am currently using A1365 from allegro and would like to replace that part with this IC because of cost and availability concernss. Is it feasible? Are there any constraints from the sensor design team to not recommend this for current sensing usages? I am measuring 0-700Hz sine wave currents.

  • Binil,

    DRV5055 will respond to the magnetic field component which is orthogonal to the face of the sensor package.  Given the field produced by your current, this should be a reasonable option for you.  The output of this device will center about Vcc/2 for 0 mT input, and the typical response of the sensor is as you have described.  I would recommend you take care for external sources of magnetic field.  For instance, a permanent magnet brought near the sensor would interfere with your current measurements.

    Thanks,

    Scott