HAL581

ADVANCE INFORMATION

16

Micronas

4.5. HAL 581

The HAL 581 is a medium sensitive unipolar switching

sensor with an inverted output (see Fig. 4–5).

The sensor turns to low current consumption with the

magnetic south pole on the branded side of the package

and turns to high 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 571 is a sensor

with the same magnetic characteristics but with a normal

output characteristic.

Magnetic Features:

– switching type: unipolar inverted

– 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 581 is designed for applications with one mag-

netic polarity and weak magnetic amplitudes at the sen-

sor position where an inverted output signal is required

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.

B

Fig. 4–5: Definition of magnetic switching points for

the HAL 581

Current consumption

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

6.5

10

13.8

8

12

15.5

0.5

2

3

11

mT

25

°C

6.5

10

13.8

8

12

15.5

0.5

2

3

11

mT

100

°C

6.5

10

13.8

8

12

15.5

0.5

2

3

11

mT

140

°C

tbd

–

tbd

tbd

–

tbd

tbd

–

tbd

tbd

mT