DATA SHEET
HAL546
4.3. HAL546
Applications
The HAL546 is a quite sensitive unipolar sensor (see
Fig. 4–7).
The HAL546 is the optimal sensor for applications with
one magnetic polarity such as:
– solid state switches,
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.
– contactless solution to replace micro-switches, and
– rotating speed measurement.
Output Voltage
VO
Magnetic Features:
– switching type: unipolar
BHYS
– high sensitivity
– typical BON: 5.5 mT at room temperature
– typical BOFF: 3.5 mT at room temperature
VOL
0
BOFF
BON
B
– operates with static magnetic fields and dynamic
magnetic fields up to 10 kHz
Fig. 4–7: Definition of magnetic switching points for
the HAL546
– typical temperature coefficient of magnetic switching
points is −1000 ppm/K.
Magnetic Characteristics at TJ = −40 °C to +140 °C, VDD = 4.3 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.
5.9
Off point B
Typ.
3.8
Hysteresis B
HYS
Magnetic Offset
Unit
ON
OFF
T
Min.
4.3
3.8
3.5
3.2
Max.
7.7
7.2
7
Min.
2.1
2
Max.
Min.
Typ.
2.1
2
Max.
Min.
Typ.
4.9
4.5
4.3
4
Max.
J
−40 °C
25 °C
5.5
5
1.5
1.4
1.1
1
2.9
2.8
2.6
2.6
−
−
mT
mT
mT
mT
5.5
3.5
2.9
−
6.1
−
100 °C
140 °C
5.3
1.9
1.8
3.3
5.4
5.5
1.9
1.7
4.8
6.9
3.1
−
−
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
Feb. 12, 2009; 000023_003EN
23
MICRONAS [ MICRONAS ]
