DATA SHEET
HAL573
4. Type Descriptions
4.1. HAL573
Applications
The HAL573 is designed for applications with one
magnetic polarity and weak magnetic amplitudes at
the sensor position such as:
The HAL573 is a unipolar switching sensor with low
sensitivity (see Fig. 4–1).
– solid state switches,
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.
– contactless solutions to replace micro switches,
– position and end point detection, and
– rotating speed measurement.
For correct functioning in the application, the sensor
requires only the magnetic south pole on the branded
side of the package.
Current consumption
IDDhigh
BHYS
Magnetic Features:
IDDlow
– switching type: unipolar
– low sensitivity
0
BOFF
BON
B
– typical BON: 43.5 mT at room temperature
– typical BOFF: 41.5 mT at room temperature
Fig. 4–1: Definition of magnetic switching points for
the HAL573
– typical temperature coefficient of magnetic switching
points is −1100 ppm/K
– operates with static magnetic fields and dynamic
magnetic fields up to 10 kHz
Magnetic Characteristics at TJ = −40 °C° to +140 °C, VDD = 3.75 V to 24 V,
Typical Characteristics for VDD = 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
On point B
Typ.
Off point B
Hysteresis B
HYS
Magnetic Offset
Unit
ON
OFF
T
Min.
−40 °C 37
Max.
49
Min.
34
Typ.
42
Max.
Min.
Typ.
2.2
2
Max.
Min.
Typ.
44.6
42.5
39
Max.
J
44.2
48
47
44
44
0.5
0.5
0.5
0.2
5
5
5
5
mT
mT
mT
mT
25 °C 37
100 °C 34
140 °C 34
43.5
49
34
41.5
38
40
46
32
2
38
46
32
36
2
39
The hysteresis is the difference between the switching points BHYS = BON − BOFF
The magnetic offset is the mean value of the switching points BOFFSET = (BON + BOFF) / 2
Micronas
Dec. 22, 2008; DSH000145_003EN
19
MICRONAS [ MICRONAS ]
