HAL 508
DATA SHEET
4.8. HAL 508
Applications
The HAL 508 is a unipolar switching sensor (see
Fig. 4–29).
The HAL 508 is the optimal sensor for applications
with one magnetic polarity such as:
– solid state switches,
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.
– contactless solution to replace microswitches,
– 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.
Output Voltage
VO
Magnetic Features:
BHYS
– switching type: unipolar,
– medium sensitivity
VOL
– typical BON: 18 mT at room temperature
– typical BOFF: 16 mT at room temperature
0
BOFF
BON
B
– operates with static magnetic fields and dynamic
magnetic fields up to 10 kHz
Fig. 4–29: Definition of magnetic switching points for
the HAL 508
– typical temperature coefficient of magnetic switching
points is −1000 ppm/K
Magnetic Characteristics at TJ = −40 °C to +170 °C, VDD = 3.8 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.
Off point B
Typ.
Hysteresis B
HYS
Magnetic Offset
Unit
ON
OFF
T
Min.
15.5
15
Max.
21.9
20.7
20.2
20
Min.
14
Max.
Min.
Typ.
2.3
2
Max.
Min.
Typ.
17.8
17
Max.
J
−40 °C
25 °C
19
16.7
20
1.6
1.5
1.1
1
2.8
2.7
2.6
2.6
-
-
mT
mT
mT
mT
18
13.5
11.9
11.4
16
19
14
-
20
-
140 °C
170 °C
13.2
12.7
15.8
14.1
18.5
18.3
1.7
1.7
15
15.3
13.6
-
14.4
-
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
36
Jan. 11. 2010; DSH000020_004EN
Micronas
MICRONAS [ MICRONAS ]
