HAL501 datasheet(3/44 Pages) ETC

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HAL5xx

Micronas

Hall Effect Sensor Family

in CMOS technology

Release Notes: Revision bars indicate significant

changes to the previous edition.

1. Introduction

The HAL5xx 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 mag-

netic 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 mag-

netic characteristics over supply voltage and tempera-

ture range. In addition, the magnetic parameters are ro-

bust 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 a SMD-package (SOT-89B)

and in a leaded version (TO-92UA).

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 against mechani-

cal stress effects

– short-circuit protected open-drain output by thermal

shut down

– operates with static magnetic fields and dynamic mag-

netic 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 mag-

netic characteristics

– ideal sensor for applications in extreme automotive

and industrial environments

– EMC corresponding to DIN 40839

1.2. Family Overview

The types differ according to the magnetic flux density

values for the magnetic switching points, the tempera-

ture behavior of the magnetic switching points, and the

mode of switching.

Type

Switching

Behavior

Sensitivity

see

Page

501

bipolar

very high

502

latching

high

503

latching

medium

504

unipolar

medium

505

latching

low

506

unipolar

high

508

unipolar

medium

509

unipolar

low

516

unipolar with

inverted output

high

517

unipolar with

inverted output

medium

518

unipolar with

inverted output

medium

519

unipolar with

inverted output

(north polarity)

high

523

unipolar

low

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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