1D Linear Position Sensor ICs
Contactless linear position sensors are simple to use when you need to accurately measure the position of an object. It is no coincidence that we have sold hundreds of millions of analog output position sensor ICs into consumer, industrial, and automotive applications.
We are also specialists in developing ISO 26262-certified digital output ICs that are widely used in ADAS applications - especially in steering systems for semi-automated cars. These EEPROM-programmable ICs offer high-precision position measurement, the world's fastest shared SENT output protocol, and unparalleled levels of system diagnostics.
We are also specialists in developing ISO 26262-certified digital output ICs that are widely used in ADAS applications - especially in steering systems for semi-automated cars. These EEPROM-programmable ICs offer high-precision position measurement, the world's fastest shared SENT output protocol, and unparalleled levels of system diagnostics.
Documentation & Resources
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
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
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.
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.
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 SENT Communications Output Protocol with A1341 and A1343 Devices
AN296108 - This application note provides a description of the Allegro implementation of the SENT protocol, which includes extensions developed by Allegro to enhance the information carrying dimensions of the output from the Allegro sensor IC to the vehicle electronic control units (ECU).
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
Non-Contact Based Controller Solutions
AN296227 - Implementing controller functions through non-contact solutions provides both performance and reliability advantages over typical contact-based input methods.
Application Note
Linearization and Two-Point Programming on the A31100 and A31102
AN296213 - This application note highlights the procedure for calculating the magnetic field compensation parameters through two-point programming and calculating the linearization coefficients using our available software tools with the intention of providing an easy-to-use guide to programming these sensor ICs.
Application Note
Unipolar Hall-Effect Sensor 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. Unipolar switches are described in this application note.
Application Note
Omnipolar 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. Omnipolar switches are described in this application note.
Application Note
Guidelines for Using Allegro Angular Sensors
Many applications in different industries, such as in industrial automation and automotive sensors and actuators, require monitoring the angle of a rotating shaft either in an on-axis or off-axis arrangement. This application note is dedicated to a review of on-axis magnetic applications.
Application Note
Microcontroller-Based Linearization of Angular Sensor ICs
AN296160 - Magnetic angle sensors are often a good choice for fast, reliable, contactless measurement of the angular position of a system, especially in dirty environments where optical encoders may not be a good fit.
Application Note
Linear Hall-Effect Sensor ICs
AN27702 - Linear sensor ICs are designed to respond to a wide range of positive or negative magnetic fields. Critical to the performance of linear ICs is their sensitivity and linearity over their specified operating temperature range.