HAL 509
4.9. HAL 509
The HAL 509 is a unipolar switching sensor (see
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.
For correct functioning in the application, the sensor
requires only the magnetic south pole on the branded
side of the package.
Magnetic Features:
– switching type: unipolar,
– low sensitivity
– typical B
ON
: 26.8 mT at room temperature
– typical B
OFF
: 23.2 mT at room temperature
– operates with static magnetic fields and dynamic
magnetic fields up to 10 kHz
– typical temperature coefficient of magnetic switching
points is
−300
ppm/K
0
B
OFF
B
ON
Applications
DATA SHEET
The HAL 509 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 microswitches,
– position and end-point detection, and
– rotating speed measurement.
Output Voltage
V
O
B
HYS
V
OL
B
Fig. 4–33:
Definition of magnetic switching points for
the HAL 509
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
140
°C
170
°C
Min.
23.1
23.1
21.7
21.3
On point B
ON
Typ.
27.4
26.8
25.7
25.4
Max.
31.1
30.4
29.2
28.9
Off point B
OFF
Min.
19.9
19.9
18.6
18.3
Typ.
23.8
23.2
22.4
22.1
Max.
27.2
26.6
25.6
25.3
Hysteresis B
HYS
Min.
2.9
2.8
2.6
2.5
Typ.
3.6
3.5
3.3
3.3
Max.
3.9
3.9
3.8
3.8
Magnetic Offset
Min.
−
21.5
−
−
Typ.
25.6
25
24
23.7
Max.
−
28.5
−
−
mT
mT
mT
mT
Unit
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
38
Jan. 11. 2010; DSH000020_004EN
Micronas
MICRONAS [ MICRONAS ]
