HAL506 Datasheet, PDF (38/44 Pages) List of Unclassifed Manufacturers – Hall Effect Sensor Family

HAL523
4.13. HAL 523
The HAL 523 is the least sensitive unipolar switching
sensor of this family (see Fig. 4–49).
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.
Magnetic Features:
– switching type: unipolar
– low sensitivity
– typical B_ON: 34.5 mT at room temperature
– typical B_OFF: 24 mT at room temperature
– operates with static magnetic fields and dynamic mag-
netic fields up to 10 kHz
Applications
The HAL 523 is the optimal sensor for applications with
one magnetic polarity and strong magnetic fields at the
sensor position 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. 4–49: Definition of magnetic switching points for
the HAL 523
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.
28
34.5 42
28
34.5 42
28
34.5 42
28
34.5 42
28
34.5 42
Off point B_OFF
Min. Typ. Max.
18
24
30
18
24
30
18
24
30
18
24
30
18
24
30
Hysteresis B_HYS
Min. Typ. Max.
7
10.5 14
7
10.5 14
7
10.5 14
7
10.5 14
7
10.5 14
Magnetic Offset
Unit
Min. Typ. Max.
29.3
mT
29.3
mT
29.3
mT
29.3
mT
29.3
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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