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
Video
A31315 - 3D Magnetic Position Sensor
Discover the cutting-edge A31315 Sensor IC with multi-point linearization, planar, and hall technologies for seamless system integration.
Technical Article
Magnetic Position Sensors in Robotics
A key function of any robot is to interact with the physical world surrounding it. To achieve this, robots contain various actuators that require accurate position sensing to enable precise movement and functionality.
Application Note
Integrating Hall-Effect Magnetic Sensing Technology into Modern Household Appliances
As technology improves, Hall-effect sensor ICs are finding their way into many modern household appliances.
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
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.
Guide
A31315 Evaluation Kit User Guide
The A31315 evaluation kit includes everything required to start programming and evaluating A31315 devices. When used in accompaniment with the Allegro sample programmer, it provides easy evaluation and programming of the A31315 devices without the need for any additional hardware or software.
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
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
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
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
TMR for 2D Angle Sensing
This paper discusses the construction and operational principle of Allegro TMR-based angle-sensing technology. The main sources of angle error in two-dimensional (2D) sensors are explained.
Application Note
Non-Intrusive Current-Sensing Using TMR: A Comparison Between TMR Sensors, Sense Resistors, Hall-Effect Sensors, and Current Transformers
Tunnel magnetoresistance (TMR) offers a set of features that allows for its use as a current sensor. Specifically, the Allegro CT100 family of linear TMR sensors can be used as a surface-mount technology (SMT), nonintrusive device with great linearity and thermal performance.
Application Note
From Hall Effect to TMR
This paper compares legacy Hall-effect technology to xMR technology, specifically tunnel magnetoresistance (TMR) from Allegro MicroSystems.
Guide
A31316 Evaluation Kit User Guide
The A31316 Evaluation Kit includes everything required to program and evaluate A31316 devices.
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.