HAL506 Datasheet, PDF (14/44 Pages) List of Unclassifed Manufacturers – Hall Effect Sensor Family

HAL501
4. Type Description
4.1. HAL 501
The HAL 501 is the most sensitive sensor of this family
with bipolar switching behavior (see Fig. 4–1).
The output turns low with the magnetic south pole on the
branded side of the package and turns high with the
magnetic north pole on the branded side. The output
state is not defined for all sensors if the magnetic field is
removed again. Some sensors will change the output
state and some sensors will not.
For correct functioning in the application, the sensor re-
quires both magnetic polarities (north and south) on the
branded side of the package.
Magnetic Features:
– switching type: bipolar
– very high sensitivity
– typical B_ON: 0.5 mT at room temperature
– typical B_OFF: –0.7 mT at room temperature
– operates with static magnetic fields and dynamic mag-
netic fields up to 10 kHz
Applications
The HAL 501 is the optimal sensor for all applications
with alternating magnetic signals and weak magnetic
amplitude at the sensor position such as:
– applications with large airgap or weak magnets,
– rotating speed measurement,
– CAM shaft sensors, and
– magnetic encoders.
Output Voltage
V_O
B_HYS
V_OL
B_OFF 0 B_ON
B
Fig. 4–1: Definition of magnetic switching points for
the HAL 501
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
–40 °C
25 °C
100 °C
140 °C
170 °C
On point B_ON
Min. Typ. Max.
–0.8 0.6
2.5
–0.5 0.5
2.3
–0.9 0.5
2.5
–1.2 0.6
2.8
–1.5 0.7
3
Off point B_OFF
Min. Typ. Max.
–2.5 –0.8 0.8
–2.3 –0.7 0.5
–2.5 –0.6 0.9
–2.5 –0.5 1.3
–2.5 –0.2 2
Hysteresis B_HYS
Magnetic Offset B_OFFSET Unit
Min. Typ. Max. Min. Typ. Max.
0.5
1.4
2
–0.1
mT
0.5
1.2
1.9
–1.4 –0.1 1.4 mT
0.5
1.1
1.8
0
mT
0.5
1.1
1.8
0
mT
0.4
0.9
1.8
0.2
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
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Micronas