Two-wire (current output), high-voltage (up to 38V), high-precision switch


Product details


Type Unipolar switch Supply voltage (Vcc) (Min) (V) 2.5 Supply voltage (Vcc) (Max) (V) 38 Operate point (Max) (mT) 5, 7, 11, 16.1 Release point (Min) (mT) 1, 3, 6.8, 11.4 Output Current 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


  • Hall effect switch with 2-wire interface
  • Low-level current output options:
    • TMAG5124A/B/C/D: 3.5 mA
    • TMAG5124E/F/G/H: 6 mA
  • Magnetic sensitivity:
    • TMAG5124A/E: 4 mT (typical)
    • TMAG5124B/F: 6 mT (typical)
    • TMAG5124C/G: 10 mT (typical)
    • TMAG5124D/H: 15 mT (typical)
  • Fast sensing bandwidth: 40 kHz
  • Supports wide voltage range
    • Operating VCC range: 2.5 V to 38 V
    • No external regulator required
  • Wide operating temperature range
    • Ambient operating temperature range: –40 °C to +125 °C
  • Protection features:
    • Supports load dump up to 40 V
    • Reverse polarity protection
  • SOT-23 package option
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The TMAG5124 device 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, allow long distance transmissions, helps detect disconnections, and limits the number of wires to two.

The device is available in a 3-pin SOT-23 package. While 3 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 2 pins, creating either a high-side or low-side configuration.

Different product variants enable selection of different levels of magnetic sensitivity to match application specific requirements.

The wide operating voltage range and reverse polarity protection of the TMAG5124 is designed for a variety of industrial applications.



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DRV5021 ACTIVE Low voltage (up to 5.5V), high bandwidth (up to 30 kHz) unipolar switch Industry standard 3-wire switch for low-voltage (5.5V) operation.
DRV5023 ACTIVE High voltage (up to 38V), high bandwidth (up to 30 kHz) unipolar switch Industry standard 3-wire switch for high-voltage (38V) operation.

Technical documentation

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Type Title Date
* Data sheet TMAG5124 2-Wire, High-Precision, Hall-Effect Switch Sensor datasheet (Rev. A) Oct. 08, 2020
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
User guide TMAG5124EVM User's Guide (Rev. A) Nov. 12, 2020

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

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.
document-generic User guide

The TMAG5124EVM is the evaluation module (EVM) for the TMAG5124, a 2-wire Hall effect sensor that utilizes a closed current loop as the signal of interest. The EVM is intended to facilitate rapid, convenient use of the device family and consists of a single printed-circuit board (PCB) that can be (...)

  • Evaluation of the TMAG5124 across all sensitivities
  • Visual feedback board included for out of the box prototyping
  • Separable coupon boards for quick prototyping

CAD/CAE symbols

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

Ordering & quality

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