Automotive, in-plane, high-precision, high-voltage switch


Product details


Type Omnipolar switch Supply voltage (Vcc) (Min) (V) 2.7 Supply voltage (Vcc) (Max) (V) 38 Operate point (Max) (mT) 6, 9.5, 13 Release point (Min) (mT) 0.3, 3.5, 6.7 Output Open drain Operating temperature range (C) -40 to 150 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


  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 0: –40°C To +150°C, TA
  • In-plane, omnipolar Hall-effect switch sensor
  • High magnetic sensitivity:
    • TMAG5123B-Q1: 4 mT (typical)
    • TMAG5123C-Q1: 7 mT (typical)
    • TMAG5123D-Q1: 10 mT (typical)
  • Supports a wide voltage range
    • 2.7-V to 38-V operating VCC range
    • No external regulator required
  • Wide operating temperature range
    • Ambient operating temperature range: –40 °C to +150 °C
  • Continuous conversion
  • Open-drain output
  • SOT-23 package option
  • Protection features
    • Supports up to 40-V load dump
    • Reverse battery protection to –20-V
    • Output short-circuit protection
    • Output current limitation
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The TMAG5123-Q1 is a chopper-stabilized omnipolar, active-low Hall-effect switch sensor. The TMAG5123-Q1 integrates an in-plane sensor enabling the sensing of horizontal fields. Available in the SOT-23 package, the TMAG5123-Q1 allows measuring magnetic fields that are parallel to the surface of the printed circuit board (PCB) to ease mechanical placement.

Different sensitivity levels are available to match the specific requirement of the application. When the applied magnetic flux density value exceeds the BOP threshold in absolute magnetic field values, the open-drain output produces a low-state voltage. The output remains low until the applied field decreases to less than the BRP threshold also in absolute terms.

The TMAG5123-Q12.7-V to 38-V operating voltage range and reverse polarity protection of up to –20-V for the device is designed for a wide range of industrial and automotive applications.

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Technical documentation

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Type Title Date
* Data sheet TMAG5123-Q1 Automotive In-Plane, High-Precision, Hall-Effect Switch Sensor datasheet Oct. 22, 2020
Application note Transition Detection Using Hall-Effect Sensors Jun. 23, 2021
Technical article What is a Hall-effect sensor? May 17, 2021
Application note Sensing Magnetic Fields In-Plane Versus Orthogonally (Rev. A) Jan. 26, 2021
Technical article 3 common design pitfalls when designing with Hall-effect sensors – and how to avoid them Jan. 07, 2021
User guide TMAG5123EVM User's Guide Jun. 18, 2020

Design & development

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Hardware development

document-generic User guide
The TMAG5123 is a family of high-precision, wide Vin, in-plane Hall effect sensors designed for system challenges where higher magnetic precision is needed for more flexibility in design. The TMAG5123 evaluation module is populated with a Sensata 499-P36-20 test socket, which allows for precision (...)
  • Integrated SOT-23 test socket for precision testing.
  • Precision in-plane channel with measurement system for precision in-plane testing.
  • USB powered for quick prototyping.

CAD/CAE symbols

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

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