HAL571

ADVANCE INFORMATION

12

Micronas

4. Type Description

4.1. HAL 571

The HAL 571 is a medium sensitive unipolar switching

sensor (see Fig. 4–1).

The sensor turns to high current consumption with the

magnetic south pole on the branded side of the package

and turns to low current consumption if the magnetic

field is removed. It does not respond to the magnetic

north pole on the branded side.

For correct functioning in the application, the sensor re-

quires only the magnetic south pole on the branded side

of the package.

In this two-wire sensor family, the HAL 581 is a sensor

with the same magnetic characteristics but with an in-

verted output characteristic.

Magnetic Features:

– switching type: unipolar

– medium sensitivity

– typical temperature coefficient of magnetic switching

points is 0 ppm/K

– operates with static magnetic fields and dynamic mag-

netic fields up to 10 kHz

Applications

The HAL 571 is designed for applications with one mag-

netic polarity and weak magnetic amplitudes at the sen-

sor position such as:

– applications with large airgap or weak magnets,

– solid state switches,

– contactless solutions to replace micro switches,

– position and end point detection, and

– rotating speed measurement.

Current consumption

B

Fig. 4–1: Definition of magnetic switching points for

the HAL 571

Magnetic flux density values of switching points.

Positive flux density values refer to the magnetic south pole at the branded side of the package.

Parameter

Magnetic Offset

Unit

Min.

Typ.

Max.

Min.

Typ.

Max.

Min.

Typ.

Max.

Min.

Typ.

Max.

–40

°C

8

12

15.5

6.5

10

13.8

0.5

2

3

11

mT

25

°C

8

12

15.5

6.5

10

13.8

0.5

2

3

11

mT

100

°C

8

12

15.5

6.5

10

13.8

0.5

2

3

11

mT

140

°C

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