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Three-Wire Hall-Effect Switches

Perfect for sensing absolute position or proximity in harsh automotive environments, our three-wire switches are ideal for applications like shift selectors, door ajar, user interfaces and vane-interrupt systems. Our Hall switches offer 4× chopper stabilization for superior temperature stability and resistance to physical stress, and all new devices are designed to ISO 26262 for functional safety.

We offer both planar and vertical Hall options and provide a broad range of device sensitivities that cover just about any application requirement.
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Solutions using temperature switches, Hall-effect switches, and magnetic sensor IC switches

Selection & Solution Guides

Allegro Product Selection Guide (PDF)

Documentation & Resources

Application Note

Two-and-Three-Wire-Sensor-Interfaces

AN296233 - Electrical interfaces for active sensor integrated circuits (ICs) include both two-wire and three-wire interfaces. These two technology styles are named for the number of required connections needed to communicate the sensor output. This application note discusses use and tradeoffs of ...

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Application Note

Latching Switch Hall-Effect IC Basics

There are four general categories of Hall-effect IC devices that provide a digital output: unipolar switches, bipolar switches, omnipolar switches, and latches. Latching Hall-effect sensor ICs, often referred to as "latches," are digital output Hall-effect switches that latch output states.

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Application Note

Improved Speed and Direction Sensing Using Vertical Hall Technology

The A1262 2D dual-channel Hall-effect sensor IC is offered in a 5-pin SOT23W surface-mount package, as well as a 4-pin SIP through-hole package. It features operation with traditional planar—as well as vertical—magnetic field direction.

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Application Note

Digital Position Sensor ICs—Continuous-Time to Chopper-Stabilized Cross-Reference Guide 

This application guide will outline the differences between the two sensor types and provide system designers with the tools needed in order to select the appropriate sensor for their system.

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