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适用于变速箱应用的先进速度传感器 IC

随着世界各国政府加强立法以最大程度地降低燃油消耗和减少二氧化碳排放，汽车制造商承受着改善其车辆油耗的压力。

汽车领域的这种转变促使人们开发旨在提高燃油效率的变速箱技术。Allegro 是开发用于变速箱应用的先进速度传感器 IC 的先驱，我们创新的反馈偏压 GMR 技术有助于满足现今的省油标准。

适用于变速箱应用的先进速度传感器 IC

随着世界各国政府加强立法以最大程度地降低燃油消耗和减少二氧化碳排放，汽车制造商承受着改善其车辆油耗的压力。

汽车领域的这种转变促使人们开发旨在提高燃油效率的变速箱技术。Allegro 是开发用于变速箱应用的先进速度传感器 IC 的先驱，我们创新的反馈偏压 GMR 技术有助于满足现今的省油标准。

在变速箱传感器性能方面设定新标准

Allegro 提供市面上最全面的变速箱产品组合。凭借领先的霍尔和 GMR 技术，Allegro 的产品系列包括各种输出接口和协议、带有磁铁和保护元件选件的 SIP 封装以及可选的 ASIL 报告。我们的变速箱速度传感器基于我们数十年的系统级专业知识打造而成，可提供行业领先的抗振性和动态气隙功能。 另外，我们的高级动态算法可补偿系统级干扰，在有系统异常的情况下，可保证稳定输出。  

我们的最新产品是一款反馈偏压 GMR 齿轮齿传感器 IC，可提供更大的气隙性能，不必牺牲我们传感器在变速箱应用中闻名的行业领先的性能。而且，出于安全考虑，我们所有最新的变速箱速度传感器 IC 均按照 ISO 26262 设计，在市面上我们是首家。

Features include:

  • Front and back-biased solutions for magnetic encoder or ferrous target sensing
  • Two-and three-wire output protocols supporting speed, direction, and ASIL error reporting (optional)
  • Integrated solutions include IC, magnet (optional), and EMC protection component(s) in a single overmolded miniature package
  • Differential sensing offers inherent common-mode stray field immunity 

  • Low jitter for high edge accuracy
  • Flexible orientation GMR technology for xMR or Hall replacement and application installation flexibility
  • EEPROM enables factory traceability throughout the production process

Featured Products

SN package image

ATS19480

Large Air Gap, GMR Speed Sensor IC for Gear Tooth Sensing

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ATS19520

The ATS19520 is an advanced Hall-effect transmissions sensor that uses an integrated back-bias magnet to measure the speed and direction of rotating ferrous targets.

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A19520

The A19520 is an advanced vibration-tolerant Hall-effect integrated circuit (IC) that measures the speed and direction of rotating targets, ideal for transmission applications.

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变速箱传感器 IC 选择指南

Selection & Solution Guides

Allegro Product Selection Guide (PDF)

Documentation & Resources

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.

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Brochure

Brochure: State-Of-The-Art Back-Biased GMR Speed Sensing

Allegro pioneers the first back-biased GMR Sensor with 50% larger air gaps. This larger air gap operation enables smaller and lighter transmissions that achieve reduced fuel consumption to help meet today's fuel economy standards.

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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.

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Application Note

A19520/ATS19520 Sensor IC Outputs Under Vibration Conditions

AN296232 - This application note details the Allegro A19520 and ATS19520 sensor IC outputs for general target and sensor vibration scenarios.

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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.

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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

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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.

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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.

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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 ...

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Application Note

Target Design for Hall Transmission Sensors

AN296178 - This application note details the impact of multiple target design parameters on the maximum air gap achievable with Allegro’s ATS692LSH and ATS19520LSN transmission sensors, allowing for measurement of speed and direction of rotating targets.

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