DATA SHEET
HAL575
4.3. HAL575
Applications
The HAL575 is a medium sensitive latching switching
sensor (see Fig. 4–9).
The HAL575 is designed for applications with both
magnetic polarities 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 consumption with the magnetic
north pole on the branded side. The current consump-
tion does not change if the magnetic field is removed.
For changing the current consumption, the opposite
magnetic field polarity must be applied.
– applications with large airgap or weak magnets,
– multipole magnet applications,
– contactless solutions to replace micro switches,
– rotating speed measurement.
For correct functioning in the application, the sensor
requires both magnetic polarities on the branded side
of the package.
Current consumption
IDDhigh
BHYS
Magnetic Features:
– switching type: latching
IDDlow
– medium sensitivity
B
BOFF
0
BON
– typical BON: 4 mT at room temperature
– typical BOFF: −4 mT at room temperature
Fig. 4–9: Definition of magnetic switching points for
the HAL575
– typical temperature coefficient of magnetic switching
points is 0 ppm/K
– operates with static magnetic fields and dynamic
magnetic fields up to 10 kHz
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
Off point B
Hysteresis B
HYS
Magnetic Offset
Unit
ON
OFF
T
Min.
0.5
0.5
0.5
0.5
Typ.
Max.
Min.
−8
Typ.
−4
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
J
−40 °C
25 °C
4
4
4
4
8
8
8
8
−0.5
−0.5
−0.5
−0.5
5
5
5
5
8
8
8
8
11
11
11
11
0
0
0
0
mT
mT
mT
mT
−8
−4
100 °C
140 °C
−8
−4
−8
−4
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
23
MICRONAS [ MICRONAS ]
