HAL54X Datasheet, PDF (23/28 Pages) Micronas – Hall-Effect Sensor Family

DATA SHEET
HAL 546
4.3. HAL546
The HAL546 is a quite sensitive unipolar sensor (see
Fig. 4–7).
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.
Magnetic Features:
– switching type: unipolar
– high sensitivity
– typical B_ON: 5.5 mT at room temperature
– typical B_OFF: 3.5 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 −1000 ppm/K.
Applications
The HAL546 is the optimal sensor for applications with
one magnetic polarity such as:
– solid state switches,
– contactless solution to replace micro-switches, and
– rotating speed measurement.
Output Voltage
V_O
B_HYS
V_OL
0
B_OFF
B_ON
B
Fig. 4–7: Definition of magnetic switching points for
the HAL546
Magnetic Characteristics at T_J = −40 °C to +140 °C, V_DD = 4.3 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
On point B_ON
Min. Typ. Max.
4.3
5.9
7.7
Off point B_OFF
Min. Typ. Max.
2.1
3.8
5.5
Hysteresis B_HYS
Min. Typ. Max.
1.5
2.1
2.9
Magnetic Offset
Min. Typ. Max.
−
4.9
−
Unit
mT
25 °C 3.8
5.5
7.2
2
3.5
5
1.4
2
2.8
2.9
4.5
6.1
mT
100 °C 3.5
5.3
7
1.9
3.3
5.4
1.1
1.9
2.6
−
4.3
−
mT
140 °C 3.2
4.8
6.9
1.8
3.1
5.5
1
1.7
2.6
−
4
−
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
Micronas
Feb. 12, 2009; 000023_003EN
23