Magnetic Position Sensors
System designers value our contactless, absolute position sensor ICs. Our robust EEPROM programmable ICs meet the accuracy requirements of stroke and rotary position sensing applications over the complete automotive voltage and temperature range.
We also understand that wiring harness costs and deep levels of system diagnostics are important for our customers. We offer a wide range of signal output protocols, including analog, PWM, 2-wire, SPI, I2C and the fastest shared SENT protocol on the market.
Our unique, dual-die ASIL D compliant solutions are ideal for ADAS and advanced safety applications.
We also understand that wiring harness costs and deep levels of system diagnostics are important for our customers. We offer a wide range of signal output protocols, including analog, PWM, 2-wire, SPI, I2C and the fastest shared SENT protocol on the market.
Our unique, dual-die ASIL D compliant solutions are ideal for ADAS and advanced safety applications.
Browse by category
1D Linear Position Sensors
Contactless position sensors are used almost everywhere- from game controllers to autonomous vehicles. And Allegro's linear position sensors are used almost everywhere, too.
2D Angle Position Sensors
Allegro's low latency, high accuracy angle sensors are ideal for high speed motor applications. With signal path latency of only 10 microseconds, our ICs can work at rotational speeds up to 30,000 RPM.
3D Magnetic Position Sensors
Our 3DMAG™ position sensors are robust, high-performing, true 3D magnetic sensing solutions.
Featured Products
A31315
3D Hall-Effect Sensor for Rotary and Linear Position Measurement
A31301
Low Power 3D Magnetic Position Sensor with SPI & I²C Interfaces and Angle Output
A31010
Small Low Power Unidirectional Linear Hall-Effect with Sleep Mode
CT815x
Product family of Tunnel Magneto-resistance (TMR) digital latches and analog sensors designed for consumer and industrial applications
Documentation & Resources
Technical Article
Magnetic Position Sensors Efficiently Drive E-Bike with Pedal Assist Systems
This technical article describes two designs for the pedal-rate measurement: a design using a pair of one-dimensional (1D) magnetic position sensors, which is common; and a two-dimensional (2D) magnetic speed and direction sensor design.
Application Note
Achieving Fast SENT Message Response with A1346 Linear Hall-Effect Sensor ICs on Shared Bus
AN296131 - In safety-critical magnetic sensing applications, such as torque sensing in electronic power steering (EPS) modules, redundant sensors are often the approach used to achieve desired performance while maintaining strict safety requirements.
Application Note
Application and Advantages of Allegro's ATS344LSP Magnetically Back-Biased Differential Linear Sensor IC
AN296157 - This application note aims to give insight on typical use of the Allegro ATS344LSP back-biased differential linear sensor IC. The main application of this sensor is to measure linear movements, such as shaft axial displacement.
Application Note
Joystick with Allegro Position Sensor IC
Joysticks are widely used human-machine interfaces (HMI) that simultaneously report information on direction and amplitude. This document explains how to implement a 2D or 3D magnetic sensor to obtain a joystick with well-defined behavior.
Application Note
Signal Path Delay for A31315 3D Sensor
AN296263 - The delay in a signal path can be described as the trail between the real-time angle and the displayed output angle. This delay represents the time needed to convert the magnetic field data sensed by the Hall plates into angle information.
Application Note
3D Hall-Effect Sensor Magnetic Tamper Detection Smart Home Systems
AN296223 - The experiment results highlight several advantages of 3D Hall-effect sensors such as their ability to detect strong magnetic fields that are randomly applied to the outside of a smart home device.
Application Note
Signal Path Delay for A31315 3D Sensor
AN296263 - The delay in a signal path can be described as the trail between the real-time angle and the displayed output angle. This delay represents the time needed to convert the magnetic field data sensed by the Hall plates into angle information.
Application Note
Enhancements to Slide-By Detection with Linear Sensors
AN296200 - This application note presents a modified solution to magnetic sensing in long stroke applications. Through the incorporation of a microcontroller, a lower cost solution can be realized with fewer linear sensors than previously existing arc tangent solutions.
Application Note
Two-Point-Programming for the A1330
AN296199 - This application note serves as a guide for using a two-point programming algorithm to calculate and program the values needed for short-stroke rotational position sensing with the A1330 angle sensor IC.
Application Note
Using A1330 ASEK DLLs to Make Two-Point Labview Programmer
AN296186 - This application note provides guidelines on how to use the A1330 dynamically linked library (DLL) with LabVIEW.
Brochure
3DMAG Position Sensors
Combining our proven planar and vertical Hall technologies, 3DMAG solutions offer robust, high-performing, three-axis magnetic field measurements in a single IC.
Application Note
Signal Path Delay for A31315 3D Sensor
AN296263 - The delay in a signal path can be described as the trail between the real-time angle and the displayed output angle. This delay represents the time needed to convert the magnetic field data sensed by the Hall plates into angle information.
Technical Article
Enabling New Levels of Performance and Safety in Magnetic Sensors with xMR
P0224: This article compares Hall-effect and magnetoresistance sensor technologies and discusses solutions to leverage these to minimize tradeoffs and meet the requirements of the most advanced emerging automotive and industrial automation applications.
Technical Article
Enhancing Smart Home Security with 3D Magnetic Sensors
P0173 - As consumers find new ways to outfit their living spaces with simple-to-use smart home and Internet of Things (IoT) products, they may be unaware of certain vulnerabilities and security features.
Technical Article
Enhancing Smart Home Security with 3D Magnetic Sensors
P0173 - As consumers find new ways to outfit their living spaces with simple-to-use smart home and Internet of Things (IoT) products, they may be unaware of certain vulnerabilities and security features.