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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.

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

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.

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.

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.

Application Note

Impact of Magnetic Relative Permeability of Ferromagnetic Target on Back-Biased Sensor Output

This application note aims to describe the target relative magnetic permeability impact on Allegro back-biased magnetic sensor output.

Technical Article

Crank Sensor IC for Stop-Start

This article describes start-stop operation and enabling Hall-effect integrated circuits, in particular the Allegro MicroSystems ATS694 and the previous generation ATS658, which are used in this application.

Application Note

EV Traction Motor Requirements and Speed Sensor Solutions

AN296226 - This paper explores the general requirement trends for speed and position sensors in traction motor systems, including high-speed capability, accuracy at startup, low-speed operation, immunity to vibration, EMC robustness, and safety.

Video

Allegro Differential Speed Sensor System Solutions

Seth Prentice, Strategic Marketing Manager for Allegro MicroSystems Speed Sensor IC group, discusses IC solutions for designing speed sensing applications including automotive transmissions, washing machine drum speeds, and fork lift positioning requiring reliable consistent output signals.

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

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.

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.

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

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.