磁性位置传感器
智能感知， 精准定位
Allegro 的位置传感器可在严苛的汽车和工业环境中提供精确的无接触线性/旋转角度测量。这些传感器支持多种输出协议，可简化设计、降低系统复杂性，并能在安全关键型应用中实现高级诊断功能
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线性位置传感器 IC
我们的线性位置传感器可提供高精度的1D 位置感应，具有先进的线性化功能，并对气隙变化具有强大的抗扰性——适用于高精度、非接触式运动跟踪的应用。
角位置传感器 IC
Allegro 的 2D 角度传感器可提供模拟和超低延迟（~10 µs）的数字输出，以实现汽车、工业和机器人应用中的精确电机控制。我们的传感器符合 ASIL-D 标准、支持双芯片冗余以及低至 ±0.3° 的角度精度，可确保平稳、高效和可靠的运行。
3D 磁性传感器
借助 Allegro 的 3DMAG™ 多轴传感器，提升更高的机械设计灵活性和精度。这些传感器经过精心设计，可捕捉3D 空间中的复杂线性和角度运动，同时抑制杂散磁场
Documentation & Resources
Guide
A31316 Evaluation Kit User Guide
The A31316 Evaluation Kit includes everything required to program and evaluate A31316 devices.
Application Note
TMR for Precision Linear Measurement
This paper covers the construction and operational principle of tunnel magnetoresistance (TMR)-based one-dimensional (1D) magnetic sensors produced by Allegro.
Application Note
From Hall Effect to TMR
This paper compares legacy Hall-effect technology to xMR technology, specifically tunnel magnetoresistance (TMR) from Allegro MicroSystems.
Application Note
Reducing the Influence of External Fields and Crosstalk for Contactless Current Sensing
Magnetic sensors are useful for measuring electrical current in conductors because the current flow generates a magnetic field around the conductor that can be measured without making electrical contact with the conductor.
Application Note
CT310 Application Guide
Numerous applications in automotive, industrial, and consumer markets require monitoring of a rotating mechanical structure. The position sensing of the angle, speed, and direction of motor shafts and knobs are typical applications for angle sensors.
Application Note
Minimizing Angle Error in 2D Magnetic Sensors by Nonorthogonality Correction
Magnetic sensors can be used for rotation detection. For this, usually a small magnet is attached to a shaft (or any other rotational axis). Thus, when the shaft rotates, the magnetic sensor detects the change of the magnetic field orientation. Such magnetic sensors are also called two-dimensional (2D) magnetic sensors.
Application Note
A31315 Slide-By Introductory Application Guide
AN296189 - The A31315 is a multi-axis Halleffect sensor with advanced integrated signal processing capabilities that simplifies the numerous design challenges that the systems designer faces.
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.
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
A31315 DLL Programming using MATLAB on Windows OS
AN296260 - This application note describes procedures for programming the A31315 DLL using MATLAB on Windows OS.
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.
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 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.
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.