Texas Instruments TMAG5124 Hall-Effect Switch Sensor

Texas Instruments TMAG5124 Hall-Effect Switch Sensor


Texas Instruments TMAG5124 Hall-Effect Switch Sensor is a high-precision Hall effect sensor that offers a 2-wire interface designed for industrial designs. The TMAG5124 integrates a current source that switches between two levels depending on the value of the magnetic field applied to the part. While the high value is fixed, the low value can be selected from two ranges. This type of interface enables robust communication between sensor and controller, allows long-distance transmissions, helps detect disconnections, and limits the number of wires to two.

The Texas Instrument TMAG5124 is available in a 3-pin SOT-23 package. While three pins are available on the package, the device only requires the VCC and GND pin to operate. The current can be measured from either of those two pins, creating either a high-side or low-side configuration. Different product variants enable the selection of different levels of magnetic sensitivity to match application-specific requirements. The wide operating voltage range and reverse polarity protection of the TMAG5124 are designed for a variety of industrial applications.


  • Hall effect switch with 2-wire interface
  • Low-level current output options
    • TMAG5124A/B/C/D (3.5mA)
    • TMAG5124E/F/G/H (6mA)
  • Magnetic sensitivity
    • TMAG5124A/E (4mT (typical))
    • TMAG5124B/F (6mT (typical))
    • TMAG5124C/G (10mT (typical))
    • TMAG5124D/H (15mT (typical))
  • 40kHz fast sensing bandwidth
  • Supports wide voltage range
    • 2.5V to 38V operating VCC range
    • No external regulator required
    • Wide operating temperature range
      • –40°C to +125°C ambient operating temperature range
    • Protection features
      • Supports load dump up to 40V
      • Reverse polarity protection
    • SOT-23 package option

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Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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