Low voltage (up to 5.5V), high bandwidth (up to 30 kHz) unipolar switch


Product details


Type Unipolar switch Supply voltage (Vcc) (Min) (V) 2.5 Supply voltage (Vcc) (Max) (V) 5.5 Operate point (Max) (mT) 4.4, 12.5, 22.7 Release point (Min) (mT) 0.4, 3.6, 6.7 Output Open drain Operating temperature range (C) -40 to 125 open-in-new Find other Hall-effect latches & switches

Package | Pins | Size

SOT-23 (DBZ) 3 7 mm² 2.92 x 2.37 open-in-new Find other Hall-effect latches & switches


  • Digital Unipolar-Switch Hall Sensor
  • 2.5-V to 5.5-V Operating VCC Range
  • Magnetic Sensitivity Options (BOP, BRP):
    • DRV5021A1: 2.9 mT, 1.8 mT
    • DRV5021A2: 9.2 mT, 7.0 mT
    • DRV5021A3: 17.9 mT, 14.1 mT
  • Fast 30-kHz Sensing Bandwidth
  • Open-Drain Output Capable of 20 mA
  • Optimized Low-Voltage Architecture
  • Integrated Hysteresis to Enhance Noise Immunity
  • Operating Temperature Range: –40°C to +125°C
  • Standard Industry Package:
    • Surface-Mount SOT-23
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The DRV5021 device is a low-voltage, digital-switch, Hall effect sensor for high-speed applications. Operating from a 2.5-V to 5.5-V power supply, the device senses magnetic flux density, and gives a digital output based on predefined magnetic thresholds.

This device senses magnetic fields perpendicular to the face of the package. When the applied magnetic flux density exceeds the magnetic operate point (BOP) threshold, the open-drain output of the device drives a low voltage. When the flux density decreases to less than the magnetic release point (BRP) threshold, the output goes to high impedance. The hysteresis resulting from the separation of BOP and BRP helps prevent output errors caused by input noise. This configuration makes system designs more robust against noise interference.

The device operates consistently across a wide ambient temperature range of –40°C to +125°C.





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Technical documentation

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Type Title Date
* Data sheet DRV5021 Low-Voltage, Unipolar, Digital-Switch Hall Effect Sensor datasheet Dec. 06, 2018
Application note Transition Detection Using Hall-Effect Sensors Jun. 23, 2021
Technical article What is a Hall-effect sensor? May 17, 2021
Technical article 3 common design pitfalls when designing with Hall-effect sensors – and how to avoid them Jan. 07, 2021

Design & development

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Hardware development

document-generic User guide
Speed up your switch, latch and linear Hall sensor prototyping and testing with the HALL-ADAPTER-EVM, which provides a fast, easy and inexpensive way to interface with small ICs. You can connect any supported Hall sensor using the included Samtec terminal strips or wire them directly to existing (...)
  • Evaluation of most Hall sensor devices from TI, including SOT-23, TO-92, X2SON, and more.
  • Standard breakout footprint for easy breadboard prototyping.
  • Magnet included.

CAD/CAE symbols

Package Pins Download
SOT-23 (DBZ) 3 View options

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