DATA SHEET
HAL576
Applications
The HAL576 is designed for applications with one
magnetic polarity and weak magnetic amplitudes at
the sensor position such as:
– applications with large airgap or weak magnets,
– solid state switches,
– contactless solutions to replace micro switches,
– position and end point detection, and
4.4. HAL576
The HAL576 is a medium sensitive unipolar switching
sensor (see Fig. 4–13).
The sensor turns to high current consumption with the
magnetic south pole on the branded side of the pack-
age and turns to low current consumption if the mag-
netic field is removed. It does not respond to the mag-
netic 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.
– rotating speed measurement.
Current consumption
Magnetic Features:
– switching type: unipolar
– medium sensitivity
– typical B
ON
: 5.7 mT at room temperature
– typical B
OFF
: 4.2 mT at room temperature
– operates with static magnetic fields and dynamic
magnetic fields up to 10 kHz
0
B
OFF
B
ON
B
I
DDlow
B
HYS
I
DDhigh
Fig. 4–13:
Definition of magnetic switching points for
the HAL576
Magnetic Characteristics
at T
J
=
−40 °C
to +140
°C,
V
DD
= 3.75 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
Min.
3.3
3.3
2.8
2
On point B
ON
Typ.
5.7
5.7
5.5
5.2
Max.
8.2
8.2
8.3
8.3
Off point B
OFF
Min.
1.8
1.8
1.3
0.3
Typ.
4.2
4.2
4
3.7
Max.
6.7
6.7
6.8
7
Hysteresis B
HYS
Min.
0.3
0.3
0.3
0.3
Typ.
1.9
1.9
1.9
1.9
Max.
3.5
3.5
3.5
3.5
Magnetic Offset
Min.
Typ.
5
5
5
4.5
Max.
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
Micronas
Dec. 22, 2008; DSH000145_003EN
25
MICRONAS [ MICRONAS ]
