HAL501 datasheet(4/48 Pages) MICRONAS

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HAL 5xy

DATA SHEET

April 15. 2010; DSH000020_004EN

Micronas

Hall Effect Sensor Family

in CMOS technology

Release Note: Revision bars indicate significant

changes to the previous edition.

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 out-

put transistor. The comparator compares the actual

magnetic flux through the Hall plate (Hall voltage) with

the fixed reference values (switching points). Accord-

ingly, the output transistor is switched on or off.

The sensors of this family differ in the switching behav-

ior 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

robust against mechanical stress effects.

The sensors are designed for industrial and automo-

tive 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

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 volt-

age range

– the decrease of magnetic flux density caused by ris-

ing temperature in the sensor system is compen-

sated 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 tem-

perature 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 out-

put 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 out-

put 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.

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

507

unipolar

medium

508

unipolar

medium

509

unipolar

low

516

unipolar with

inverted output

high

519

unipolar with

inverted output

(north polarity)

high

523

unipolar

low

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