1. Introduction
The HAL 5xy family consists of different Hall switches
produced in CMOS technology. All 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.
The sensors of this family differ in the switching behavior
and the switching points.
The active offset compensation leads to constant magnetic
characteristics over supply voltage and temperature
range. In addition, the magnetic parameters are
robust against mechanical stress effects.
The sensors are designed for industrial and automotive
applications and operate with supply voltages from
3.8 V to 24 V in the ambient temperature range from
−40 °C up to 150 °C.
All sensors are available in the SMD-package
SOT89B-1 and in the leaded versions TO92UA-1 and
TO92UA-2.
1.1. Features:
– switching offset compensation at typically 62 kHz
– operates from 3.8 V to 24 V supply voltage
– overvoltage protection at all pins
– reverse-voltage protection at VDD-pin
– magnetic characteristics are robust regarding
mechanical stress effects
– short-circuit protected open-drain output by thermal
shut down
– operates with static magnetic fields and dynamic
magnetic fields up to 10 kHz
– constant switching points over a wide 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 the magnetic characteristics
– ideal sensor for applications in extreme automotive
and industrial environments
– EMC corresponding to ISO 7637

1.2. Family Overview
The types differ according to the magnetic flux density
values for the magnetic switching points and the temperature
behavior of the magnetic switching points,
and the mode of switching.

Latching Sensors:
The output turns low with the magnetic south pole on
the branded side of the package and turns high with
the magnetic north pole on the branded side. The output
does not change if the magnetic field is removed.
For changing the output state, the opposite magnetic
field polarity must be applied.
Bipolar Switching Sensors:
The output turns low with the magnetic south pole on
the branded side of the package and turns high with
the magnetic north pole on the branded side. The output
state is not defined for all sensors if the magnetic
field is removed again. Some sensors will change the
output state and some sensors will not.

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