HAL519
36
Micronas
4.12. HAL519
The HAL519 is a very sensitive unipolar switching sen-
sor with an inverted output sensitive only to the magnetic
north polarity. (see Fig. 4
–
45).
The output turns high with the magnetic north pole on the
branded side of the package and turns low if the magnet-
ic field is removed. The sensor does not respond to the
magnetic south pole on the branded side, the output re-
mains low. For correct functioning in the application, the
sensor requires only the magnetic north pole on the
branded side of the package.
Magnetic Features:
–
switching type: unipolar inverted, north sensitive
–
high sensitivity
–
typical B
ON
:
–
3.5 mT at room temperature
–
typical B
OFF
:
–
5.5 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 HAL519 is the optimal sensor for all applications
with the north magnetic polarity and weak magnetic am-
plitude at the sensor position where an inverted output
signal is required such as:
–
solid state switches,
–
contactless solution to replace micro switches,
–
position and end point detection, and
–
rotating speed measurement.
B
HYS
Output Voltage
0
B
OFF
B
ON
V
OL
V
O
B
Fig. 4
–
45:
Definition of magnetic switching points for
the HAL519
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
On point B
ON
Typ.
Off point B
OFF
Min.
Typ.
Hysteresis B
HYS
Min.
Typ.
Magnetic Offset
Min.
Typ.
Unit
Min.
Max.
Max.
Max.
Max.
–
40
°
C
–
5.4
–
3.8
–
2.1
–
7.7
–
5.9
–
4.3
1.6
2.1
2.8
–
4.8
mT
25
°
C
–
5
–
3.6
–
2
–
7.2
–
5.5
–
3.8
1.5
1.9
2.7
–
6.2
–
4.5
–
3.8
mT
100
°
C
–
4.9
–
3.3
–
1.9
–
6.7
–
5
–
3.4
1.2
1.7
2.6
–
4.2
mT
140
°
C
–
5.1
–
3.1
–
1.7
–
6.8
–
4.8
–
3.1
1
1.7
2.6
–
4
mT
170
°
C
–
5.2
–
3
–
1.5
–
6.8
–
4.6
–
2.8
0.9
1.6
2.6
–
3.8
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