磁性速度传感器
Allegro 提供更全面的磁性速度传感器 IC 产品组合，涵盖各种速度以及带方向的速度、两线和三线接口、磁性编码器（环形磁体）和齿轮齿感应、霍尔和 GMR 技术，以及符合 ASIL 的选项，这些选项适用于变速箱、轮速、发动机、电机和更多编码器和齿轮齿感应应用。
创新型 Allegro 霍尔效应和 GMR 技术可提供市场上更稳健且更可靠的齿轮齿和环形磁体速度感应。
得益于数十年的应用和算法经验以及与 OEM 的密切合作，Allegro 能够根据具体应用来开发速度传感器 IC，并针对您的目标应用进行优化 — 以此提高安全性、可靠性和性能。
- 对系统的变化（即目标跳动、振动、热梯度）进行动态补偿，可以降低设计复杂度和成本并提高可靠性。
- 用于 EMC 保护的集成封装以及可选配的磁偏置，可简化设计和组装，同时提高性能。
- 分立元件集成，可消除对外部 PCB 和元件的需求，从而显著降低总系统成本（第三代 GTS 封装）。
Browse by category
Camshaft Sensor ICs
We provide fully integrated hall-effect camshaft position sensor IC solutions for EMC protection and true power-on state (TPOS). Optional back-biased magnets simplify your design while improving performance.
Crankshaft Sensor ICs
With high performance and excellent edge accuracy, our fully integrated ICs are also highly flexible. We offer optimized solutions for engines in 2-wheelers and advanced solutions that are essential for start-stop engines.
Special Purpose and E-Motor Speed Sensor ICs
Working on something other than a vehicle? Our portfolio provides optimized speed sensor IC solutions for many non-automotive applications.
Transmission Sensor ICs
Our ICs are ready for any challenge presented by fuel-efficient 6 to 10-speed transmissions, providing you with industry-leading vibration immunity and dynamic air gap capability.
Wheel Speed Sensor ICs
Our patented, best-in-class GMR technology provides low jitter and high air gap over the widest installation tolerance.
Documentation & Resources
Application Note
Understanding Input Signal Variation in Sensor ICs with SolidSpeed Digital Architecture
AN29622 - This application note is to be used to aid the understanding of these datasheet line items. This specification change can be seen in the A19302 and A19571 datasheets and will continue to be used in many parts that use this technology moving forward
Application Note
Speed Sensor Protocols
AN296246 - This application note provides a detailed description of commonly used output protocols implemented in speed sensors. It also lists the benefits and drawbacks of each and provides information on the safety mechanisms these protocols offer to achieve compliance with the latest automotive safety standards.
Application Note
Fundamental Properties of Speed Sensors
The aim of this application note is to provide a solid foundation for understanding and comparing the fundamental properties of speed sensors that are valid not only for Allegro products but for speed sensors in general.
Application Note
System-Level Application Considerations for Magnetic Speed Sensors
AN296266 - The use of a noncontact, active, speed sensor integrated circuit (IC) greatly simplifies system design-in of a magnetic speed sensor. Although these ICs are designed to operate under a wide variety of system factors, the cautious automotive designer must contemplate certain more-subtle system considerations.
Application Note
Method for Mechanical Mounting Tolerance Compensation on Allegro Speed Sensors
AN296175 - Accuracy requirements for absolute mechanical edge detection on cam sensors and more generally on engine management speed sensors have noticeably increased with the need for power optimization and emissions control in car engines being sold today.
Application Note
Target Design for Back-Biased Hall Sensor IC ATS667LSG
In the following, the magnet designs are fixed by using an Allegro IC package with an integrated magnet.
Application Note
GMR Crankshaft Target Design Guidelines
AN296198 - This application note offers guidelines for designing an optimal target for crankshaft applications.
Application Note
Wheel Speed Sensors Operating in Harsh Environments
Wheel speed sensors (WSS) operate in harsh environments with limited shielding and temperature control. Allegro Microsystems has developed innovative algorithms and high-performance sensors to operate in these environments.
Application Note
Methods and Validation of Stray Magnetic Field Mitigation in Magnetic Speed Sensor ICs
AN296250 - This document provides an overview of the phenomena of stray magnetic fields, its various sources, solutions developed to minimize its effects, and product proposals tolerant to stray field perturbations.
Application Note
Transmission Gear Tooth Sensing
AN296221 - In this application note learn how our industry-leading, time-proven algorithms included on our transmission ICs have been designed to handle the most stringent application conditions.
Application Note
Benefits of Dynamic Threshold Feature in ATS16351, GMR Back-Biased Speed Sensor IC
AN296257 - The Allegro ATS16351PSM [1] is a True-Power-On-State (TPOS) sensor providing the speed and position of a rotational ferromagnetic target.
Application Note
Effect of Ring Magnet Dimensions on Differential Speed Sensor Performance
AN296251 - In this application note, we describe how ring magnet dimensions affect speed sensor performance is given.
Application Note
Giant Magnetoresistance versus Hall-effect: A Comparison of Technologies for Speed Sensor Applications
Allegro MicroSystems giant magnetoresistance (GMR) effect technology offerings build on lessons learned from experience with Hall-effect devices to enable new options for speed sensing system design.
Technical Article
The Future of Automotive Wheel Sensing with GMR
P0083 - With the rise of vehicle electrification, computerized control systems, and subsystem reliability monitoring, it has become essential for systems to have accurate rotational information for each wheel of the vehicle.
Application Note
Differential Hall-Effect Sensors: Safer and More Reliable for Two-Wheelers of the Future
AN296173 - The use of electronic controls for engine, transmission, and wheel speed in two- and three-wheeled vehicles is growing, particularly in developing nations. This trend is largely driven by mandates to improve air quality, fuel efficiency, and vehicle safety worldwide.