Motor Position Sensors (2D)
Allegro’s 2D angle sensors deliver analog and ultra-low latency (~10 µs) digital outputs for precise motor control in automotive, industrial and robotics applications. Our sensors ensure smooth, efficient and reliable operation with ASIL-D compliance, dual-die redundancy, and angular accuracy down to ±0.3°.
Featured Products
A33020
The A33020 is a stray field immune, 360° angle sensor IC that provides high-resolution angular position information based on magnetic sensing technology.
A33110
Precision TMR Angle Sensor with Integrated Diagnostics
AAS33001
Precision Angle Sensor IC with Incremental and Motor Commutation Outputs and On-Chip Linearization
CT310
The CT310 is a 2D angular sensor in a dual full-bridge configuration.
Product Selection Guide
Documentation & Resources
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
Angle Error Correction with the A33230
This application note describes the mathematics to convert the analog sine/cosine outputs of the A33230 into an angular position.
Application Note
Using the A1335 in a Short Stroke Application
AN296166 - This application note is dedicated to short-stroke magnetic applications using Allegro angular position sensors based on circular vertical Hall (CVH) technology. Analyses and data used in this document are based on the A1335 angle sensor IC.
Application Note
Calibration Algorithm for Optimal Angle Calculation
AN296224 -This document describes how to implement different possible calibration algorithms to achieve optimal accuracy in angle calculation for Allegro angle sensors with analog sine-cosine outputs.
Brochure
Brochure: Motor Position and Angle Sensing
The Allegro A33230 Hall-effect position and angle sensor IC is the smallest 3D Sine/Cosine sensor currently available in the market.
Application Note
Advanced On-Chip Linearization in the A1335 Angle Sensor IC
AN296127 - This document shows how magnetic-input-related errors in excess of ±20 degrees can be linearized by the A1335 to as low as ±0.3 degrees—roughly a 65× improvement.
Application Note
A1337/A1338 System Timing
AN296138 - The A1337 and A1338 are high-speed high-accuracy magnetic angle sensor ICs, ideal for motor position sensing. This application note provides a brief description of the internal signal processing delays of the A1337 and A1338 angle sensors.
Application Note
Output Protocols for Angle and Linear Position Sensors
AN296191 - This application note describes working principles, lists advantages and limitations, outlines communication rates/delays, and defines error reporting tactics for digital and analog protocols used in angle and linear position sensing.
Application Note
Advanced On-Chip Linearization in the A1335 Angle Sensor IC
Numerous applications in industries—spanning from industrial automation and robotics, to electronic power steering and motor position sensing—require monitoring the angle of a rotating shaft either in an on-axis or off-axis arrangement.
Application Note
Advanced On-Chip Linearization in the A1332 Angle Sensor IC
There are two linearization techniques offered in the A1332 angle sensor IC. The first is called Segmented Linearization, and the second is called Harmonic Linearization. handwheel position sensor
Application Note
Advanced Programming with ASEK DLLs Harmonic Linearization
This application note describes the functions and the process flow the customer can use if the Allegro-provided software is not flexible enough or if custom software is to be used.
Application Note
Low-Power and Turns-Count Sensing with the A1337 Angle Sensor IC
AN296116 - This application note covers the use of the Allegro A1337 angle sensor IC for battery powered applications (automotive or non-automotive) that require the sensor to operate in multiple mission modes.
Application Note
3D Linear or 2D Angle Sensing with the ALS31300 and ALS31313 Hall-Effect ICs
AN296140 - This application note describes the use of the ALS31300 and ALS31313 3D Linear Hall-Effect Sensor integrated circuits (ICs) from Allegro MicroSystems for 3D linear sensing and 2D angle sensing applications.
Application Note
Low Power and Turns-Count Sensing with the A1339 Angle Sensor IC
AN296139 - This application note covers the use of the Allegro A1339 angle sensor IC for battery-powered applications (automotive or non-automotive) that require the sensor to operate in multiple mission modes.
Application Note
Advanced Power Management Using the ALS31300 and ALS31313 3D Hall-Effect Sensor ICs with I2C Output
AN296144 - This application note discusses the unique and advanced low power modes available on the ALS31300 and ALS31313 3D Linear Hall-Effect Sensor ICs with I2C output available from Allegro MicroSystems.