HAL54X datasheet(21/28 Pages) MICRONAS

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DATA SHEET

HAL543

Micronas

Feb. 12, 2009; DSH000023_003EN

4.2. HAL543

The HAL543 is the most insensitive unipolar sensor of

this family (see Fig. 4–4).

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.

Magnetic Features:

– switching type: unipolar

– low sensitivity

–typical BON: 27 mT at room temperature

–typical BOFF: 21 mT at room temperature

– operates with static magnetic fields and dynamic

magnetic fields up to 10 kHz

– points is

−1000 ppm/K

Applications

The HAL543 is the optimal sensor for applications with

unipolar magnetic signals and large magnetic ampli-

tude at the sensor position such as:

– position and end-point detection,

– contactless solution to replace microswitches,

– rotating speed measurement.

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

the HAL543

Magnetic Characteristics at TJ = −40 °C to +140 °C, VDD = 4.3V 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

27331521

274

−

°C

27331521

274

100

°C

27331521

274

−

140

°C

27331521

274

5.5

−

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