The HAL® 401 from Micronas is a Linear Hall Effect Sensors produced in CMOS technology. The sensor includes a temperature-compensated Hall plate with choppered offset compensation, two linear output stages, and protection devices. The output voltage is proportional to the magnetic flux density through the hall plate. The choppered offset compensation leads to stable magnetic characteristics over supply voltage and temperature.
The HAL 401 can be used for magnetic field measurements, current measurements, and detection of any mechanical movement. Very accurate angle measurements or distance measurements can also be done. The sensor is very robust and can be used in electrical and mechanical hostile environments.
The sensor is designed for industrial and automotive applications and operates in the ambient temperature range from –40°C up to 150°C and is available in the SMD-package SOT89B-1.