磁気ポジション センサー
モーション、角度、直線位置をよりスマートにセンシング
Allegro の位置センサは、過酷な車載および産業環境下で、高精度な非接触の直線および回転測定を実現します。複数の出力プロトコルに対応しているため、これらのセンサは設計を簡素化し、システムの複雑性を低減し、安全性が重視されるアプリケーションにおいて高度な診断機能を可能にします。
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リニア ポジション センサー IC
当社のリニアポジションセンサは、高度な線形化とエアギャップの変動に対する強い耐性により、高精度な1次元（1D）位置検出を実現します—精密な非接触モーショントラッキングが求められるアプリケーションに最適です。
角度ポジション センサー IC
Allegro の 2D 角度センサは、車載、産業、ロボットの各アプリケーションにおける高精度なモータ制御向けに、アナログおよび超低レイテンシー (~10 µs) のデジタル出力を提供します。当社のセンサは、ASIL-D 準拠、デュアルダイ冗長性、および最大 ±0.3° の角度精度により、スムーズで効率的、かつ信頼性の高い動作を保証します。
3 次元磁気速度センサー
Allegroの3DMAG™多軸センサは、浮遊磁場を排除しつつ3次元（3D）空間における複雑な直線運動および回転運動を捉えるように設計されており、機械設計の柔軟性と精度をさらに向上させます。
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 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
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
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.
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
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.
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.
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
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.