The MLX92211 from Melexis features a very sensitive Hall-Effect sensor operating from 2.7 to 24 volts and covering automotive, consumer, and industrial applications. With latching magnetic behavior, the open drain output is switched ON and OFF by applying south and north magnetic field perpendicularly to the package top side-- typically the case with rotary applications using "on-shaft" multi-poles ring magnet. Especially designed for automotive applications, the device integrates all protections required when using "integrated" or "remote" sensors like very high electro-static discharge (ESD) rating, reverse supply voltage protection, output short circuit protection, and even more.
The MLX92211 core is based on a high voltage sub-micron process ideally suited to handle low and high operating voltage from 2.7 to 24 volts as well as low and high operating temperatures from -40°C to 150°C. The whole magnetic core was reinvented in this platform with a special focus on the offset cancellation system to allow faster and more accurate processing while being temperature insensitive. A negative temperature coefficient of -1000 ppm/°C was implemented to compensate the natural behavior of magnets becoming weaker with rise in temperature. The result leads to very stable and accurate magnetic switching points of typically ±3 mT at 25°C, while the output is updated every 6 μs with a jitter of only ±3 μs, thus increasing repeatability factor within the application.
