Introduction
The HAL300 is a differential Hall switch produced in CMOS technology. The sensor includes 2 temperature compensated Hall plates (2.05 mm apart) with active offset compensation, a differential amplifier with a Schmitt trigger, and an open-drain output transistor (see Fig. 2).

Features:
– distance between Hall plates: 2.05 mm
– operates from 4.5 V to 24 V supply voltage
– switching offset compensation at 62 kHz
– overvoltage protection
– reverse-voltage protection at VDD-pin
– short-circuit protected open-drain output by thermal shutdown
– operates with magnetic fields from DC to 10 kHz
– output turns low with magnetic south pole on branded side of package and with a higher magnetic flux density in sensitive area S1 as in S2
– on-chip temperature compensation circuitry minimizes shifts of the magnetic parameters over temperature and supply voltage range
– the decrease of magnetic flux density caused by rising temperature in the sensor system is compensated by a built-in negative temperature coefficient of hysteresis
– EMC corresponding to DIN 40839