HAL501 datasheet(44/48 Pages) MICRONAS

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HAL 523

DATA SHEET

April 15. 2010; DSH000020_004EN

Micronas

4.12. HAL 523

The HAL 523 is the least sensitive unipolar switching

sensor of this family (see Fig. 4–45).

The output turns low with the magnetic south pole on

the branded side of the package and turns high if the

magnetic field is removed. The sensor does not

respond to the magnetic 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: 34.5 mT at room temperature

–typical BOFF: 24 mT at room temperature

– operates with static magnetic fields and dynamic

magnetic fields up to 10 kHz

Applications

The HAL 523 is the optimal sensor for applications

with one magnetic polarity and strong magnetic fields

at the sensor position such as:

– solid-state switches,

– contactless solution to replace microswitches,

– position and end-point detection, and

– rotating speed measurement.

Fig. 4–45: Definition of magnetic switching points for

the HAL 523

Magnetic Characteristics at TJ = −40 °C to +170 °C, VDD = 3.8 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

VOL

Output Voltage

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

34.5

421824

307

10.5

−

29.3

−

°C

34.5

421824

307

10.5

−

29.3

−

140

°C

34.5

421824

307

10.5

−

29.3

−

170

°C

34.5

421824

307

10.5

−

29.3

−

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