DATA SHEET
HAL543
4.2. HAL543
Applications
The HAL543 is the most insensitive unipolar sensor of
this family (see Fig. 4–4).
The HAL543 is the optimal sensor for applications with
unipolar magnetic signals and large magnetic ampli-
tude at the sensor position such as:
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.
– position and end-point detection,
– contactless solution to replace microswitches,
– rotating speed measurement.
Output Voltage
VO
Magnetic Features:
– switching type: unipolar
BHYS
– low sensitivity
– typical BON: 27 mT at room temperature
– typical BOFF: 21 mT at room temperature
VOL
– operates with static magnetic fields and dynamic
magnetic fields up to 10 kHz
0
BOFF
BON
B
– points is −1000 ppm/K
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.
Parameter
On point B
Off point B
Hysteresis B
HYS
Magnetic Offset
Unit
ON
OFF
T
Min.
21
Typ.
27
Max.
33
Min.
15
Typ.
21
Max.
Min.
Typ.
6
Max.
Min.
Typ.
24
Max.
J
−40 °C
25 °C
27
27
27
27
4
4
4
4
8
8
8
8
−
−
mT
mT
mT
mT
21
27
33
15
21
6
18
−
24
30
−
100 °C
140 °C
21
27
33
15
21
6
24
21
27
33
15
21
5.5
−
24
−
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
Micronas
Feb. 12, 2009; DSH000023_003EN
21