DATA SHEET
HAL576
4.4. HAL576
Applications
The HAL576 is a medium sensitive unipolar switching
sensor (see Fig. 4–13).
The HAL576 is designed for applications with one
magnetic polarity and weak magnetic amplitudes at
the sensor position such as:
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.
– 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.
For correct functioning in the application, the sensor
requires only the magnetic south pole on the branded
side of the package.
Current consumption
IDDhigh
Magnetic Features:
– switching type: unipolar
BHYS
– medium sensitivity
IDDlow
– typical BON: 5.7 mT at room temperature
– typical BOFF: 4.2 mT at room temperature
0
BOFF
BON
B
– operates with static magnetic fields and dynamic
magnetic fields up to 10 kHz
Fig. 4–13: Definition of magnetic switching points for
the HAL576
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.
Parameter
On point B
Typ.
5.7
Off point B
Hysteresis B
HYS
Magnetic Offset
Unit
ON
OFF
T
Min.
3.3
3.3
2.8
2
Max.
8.2
Min.
1.8
1.8
1.3
0.3
Typ.
4.2
4.2
4
Max.
Min.
Typ.
1.9
1.9
1.9
1.9
Max.
Min.
Typ.
5
Max.
J
−40 °C
25 °C
6.7
6.7
6.8
7
0.3
0.3
0.3
0.3
3.5
3.5
3.5
3.5
mT
mT
mT
mT
5.7
8.2
5
100 °C
140 °C
5.5
8.3
5
5.2
8.3
3.7
4.5
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
Dec. 22, 2008; DSH000145_003EN
25
MICRONAS [ MICRONAS ]
