HAL506 Datasheet, PDF (26/44 Pages) List of Unclassifed Manufacturers – Hall Effect Sensor Family

HAL508
4.7. HAL 508
The HAL 508 is a unipolar switching sensor (see
Fig. 4–25).
The output turns low with the magnetic south pole on the
branded side of the package and turns high if the mag-
netic field is removed. The sensor does not respond to
the magnetic north pole on the branded side.
For correct functioning in the application, the sensor re-
quires only the magnetic south pole on the branded side
of the package.
In the HAL 5xx family, the HAL 518 is a sensor with the
same magnetic characteristics but with an inverted out-
put characteristic.
Magnetic Features:
– switching type: unipolar
– medium sensitivity
– typical B_ON: 18 mT at room temperature
– typical B_OFF: 16 mT at room temperature
– operates with static magnetic fields and dynamic mag-
netic fields up to 10 kHz
– typical temperature coefficient of magnetic switching
points is –1000 ppm/K
Applications
The HAL 508 is the optimal sensor for applications with
one magnetic polarity such as:
– solid state switches,
– contactless solution to replace micro switches,
– position and end point detection, and
– rotating speed measurement.
Output Voltage
V_O
B_HYS
V_OL
0
B_OFF
B_ON
B
Fig. 4–25: Definition of magnetic switching points for
the HAL 508
Magnetic Characteristics at T_J = –40 °C to +170 °C, V_DD = 3.8 V to 24 V,
Typical Characteristics for V_DD = 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
T_J
–40 °C
25 °C
100 °C
140 °C
170 °C
On point B_ON
Min. Typ. Max.
15.5 19
21.9
15
18
20.7
13.9 16.6 20.4
13.2 15.8 20.2
12.7 15.3 20
Off point B_OFF
Min. Typ. Max.
14
16.7 20
13.5 16
19
12.5 14.8 18.7
11.9 14.1 18.5
11.4 13.6 18.3
Hysteresis B_HYS
Min. Typ. Max.
1.6
2.3
2.8
1.5
2
2.7
1.2
1.8
2.6
1.1
1.7
2.6
1
1.7
2.6
Magnetic Offset
Unit
Min. Typ. Max.
17.8
mT
14
17
20
mT
15.7
mT
15
mT
14.4
mT
The hysteresis is the difference between the switching points B_HYS = B_ON – B_OFF
The magnetic offset is the mean value of the switching points B_OFFSET = (B_ON + B_OFF) / 2
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