HAL575SF-K datasheet(19/36 Pages) MICRONAS

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DATA SHEET

HAL573

Micronas

Dec. 22, 2008; DSH000145_003EN

4. Type Descriptions

4.1. HAL573

The HAL 573 is a unipolar switching sensor with low

sensitivity (see Fig. 4–1).

The sensor turns to high current consumption with the

magnetic south pole on the branded side of the pack-

age and turns to low current consumption if the mag-

netic field is removed. It does not respond to the mag-

netic north pole on the branded side.

For correct functioning in the application, the sensor

requires only the magnetic south pole on the branded

side of the package.

Magnetic Features:

– switching type: unipolar

– low sensitivity

–typical BON: 43.5 mT at room temperature

–typical BOFF: 41.5 mT at room temperature

– typical temperature coefficient of magnetic switching

points is

−1100 ppm/K

– operates with static magnetic fields and dynamic

magnetic fields up to 10 kHz

Applications

The HAL573 is designed for applications with one

magnetic polarity and weak magnetic amplitudes at

the sensor position such as:

– solid state switches,

– contactless solutions to replace micro switches,

– position and end point detection, and

– rotating speed measurement.

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

the HAL573

Magnetic Characteristics at TJ = −40 °C° to +140 °C, VDD = 3.75 V to 24 V,

Typical Characteristics for VDD = 12 V

Magnetic flux density values of switching points.

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

The hysteresis is the difference between the switching points BHYS = BON − BOFF

The magnetic offset is the mean value of the switching points BOFFSET = (BON + BOFF) / 2

BOFF

BON

IDDhigh

IDDlow

Current consumption

BHYS

Parameter

On point BON

Off point BOFF

Hysteresis BHYS

Magnetic Offset

Unit

Min.

Typ.

Max.

Min.

Typ.

Max.

Min.

Typ.

Max.

Min.

Typ.

Max.

−40 °C

44.2

0.5

2.2

44.6

°C

43.5

493441.5

470.5

42.5

100

°C

40463238

440.5

140

°C

38463236

440.2

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