DATA SHEET
HAL574
4.2. HAL574
Applications
The HAL574 is a medium sensitive unipolar switching
sensor (see Fig. 4–5).
The HAL574 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
In this two-wire sensor family, the HAL584 is a sensor
with the same magnetic characteristics but with an
inverted output characteristic.
BHYS
Magnetic Features:
IDDlow
– switching type: unipolar
– medium sensitivity
0
BOFF
BON
B
– typical BON: 9.2 mT at room temperature
– typical BOFF: 7.2 mT at room temperature
Fig. 4–5: Definition of magnetic switching points for
the HAL574
– 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 = 4.3 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.
9.2
Off point B
Typ.
7.2
Hysteresis B
HYS
Magnetic Offset
Unit
ON
OFF
T
Min.
5.5
5.5
5.5
5
Max.
12
Min.
5
Max.
Min.
Typ.
2
Max.
Min.
Typ.
8.2
8.2
8.2
8.2
Max.
J
−40 °C
25 °C
11.5
11.5
11.5
11.5
0.5
0.5
0.5
0.2
3
mT
mT
mT
mT
9.2
12
5
7.2
2
3
100 °C
140 °C
9.2
12
5
7.2
2
3
8.8
12.5
3.5
7.5
1.9
3.5
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
21
MICRONAS [ MICRONAS ]
