Introduction

The Hall switches HAL 525 and HAL 526 are produced in CMOS technology. These sensors include a temperature-compensated Hall plate with active offset compensation, a comparator, and an open-drain output transistor. The comparator compares the actual magnetic flux through the Hall plate (Hall voltage) with the fixed reference values (switching points). Accordingly, the output transistor is switched on or off.

Features

– operates from 3.8 V to 24 V supply voltage

– operates with static magnetic fields and dynamic magnetic fields up to 10 kHz

– overvoltage protection at all pins

– reverse-voltage protection at VDD-pin

– magnetic characteristics are robust against mechanical stress effects

– short-circuit protected open-drain output by thermal shut down

– constant switching points over a wide supply voltage range

– the decrease of magnetic flux density caused by rising temperature in the sensor system is compen sated by a built-in negative temperature coefficient of the magnetic characteristics

– ideal sensor for window lifter, ignition timing, and revolution counting in extreme automotive and industrial environments

– EMC corresponding to ISO 7637