GMR Gear Tooth Speed Sensor with Large Air Gap for Increased Design Flexibility and Reliability in Emerging Electric Vehicle Applications

Published  July 8, 2021   0
ATS19480 Sensor IC

ATS19480 from Allegro MicroSystems is a new, state-of-the-art giant magnetoresistance (GMR) speed sensor that measures the rotation of ferromagnetic gears. Ideal for hybrid and pure electric vehicle transmissions, this sensor can be used in two-wheelers, off-road vehicles, and industrial application designs requiring speed-only information. The single-channel GMR gear tooth speed sensor gives transmission designers more options than the existing solutions. It helps in reducing system complexity, size, weight, cost, and energy consumption, thereby boosting efficiency and minimizing carbon footprints.

The ATS19480 sensor IC combines advanced GMR technology with automotive-grade algorithms and packaging technology to enable system developers and manufacturers to achieve high levels of in-system capability and adaptability. This new sensing IC comes with an air gap that is 50% more than the existing options available in the market. This feature makes the device capable of improving design-in flexibility, expanding design margin and tolerance capability, and facilitating a wider range of sensor installation locations.

The high air gap and level of accuracy of ATS19480 single-chip GMR IC ensures to deliver high performance in emerging electric vehicle applications. A fully integrated, single overmold package of the device reduces design complexities and simplifies the development process. Additionally, the monolithic integration ensures exceptional in-system performance and highly accurate speed detection in emerging electric vehicles. The ATS19480 sensor IC comes with integrated ASIL B diagnostics and a certified safety design process for optional fault reporting, and superior operation under harsh operating conditions to reduce failure rates. The back-biased ATS19480 speed sensor IC is available in a lead (Pb)-free, 3-pin SIP package (suffix SN) with tin leadframe plating from the company website.