HAL566 Datasheet, PDF (16/21 Pages) Micronas – Two-Wire Hall Effect Sensor Family

HAL566
4.3. HAL 566
The HAL 566 is a very sensitive unipolar switching
sensor with an inverted output (see Fig. 4–9).
The sensor turns to low current consumption with the
magnetic south pole on the branded side of the package
and turns to high current consumption if the magnetic
field is removed. It does not respond to the magnetic
north pole on the branded side.
For correct functioning in the application, the sensor re-
quires only the magnetic south pole on the branded side
of the package.
In the HAL 55x, HAL 56x two-wire sensor family, the
HAL556 is a sensor with the same magnetic character-
istics but with a normal output characteristic.
Magnetic Features:
– switching type: unipolar inverted
– high sensitivity
– typical B_ON: 4 mT at room temperature
– typical B_OFF: 5.9 mT at room temperature
– operates with static magnetic fields and dynamic mag-
netic fields up to 10 kHz
Applications
The HAL 566 is designed for applications with one mag-
netic polarity and weak magnetic amplitudes at the sen-
sor position where an inverted output signal is required
such as:
– applications with large airgap or weak magnets,
– solid state switches,
– contactless solutions to replace micro switches,
– position and end point detection, and
– rotating speed measurement.
Current consumption
I_DDhigh
B_HYS
I_DDlow
0
B_ON
B_OFF
B
Fig. 4–9: Definition of magnetic switching points for
the HAL 566
Magnetic Characteristics at T_J = –40 °C to +170 °C, V_DD = 4 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.
2.1
4
5.9
2
3.9
5.7
1.85 3.8
5.7
1.3
3.6
6
1
3.4
6.3
Off point B_OFF
Min. Typ. Max.
3.4
6
7.7
3.4
5.9
7.2
3.25 5.6
7
2.6
5.2
7.3
2.2
4.8
7.6
Hysteresis B_HYS
Min. Typ. Max.
0.8
2
2.8
0.5
2
2.7
0.3
1.8
2.6
0.2
1.6
3
0.2
1.4
3
Magnetic Offset
Unit
Min. Typ. Max.
5
mT
3
4.9
6.2 mT
4.7
mT
4.4
mT
4.1
mT
The hysteresis is the difference between the switching points B_HYS = B_OFF – B_ON
The magnetic offset is the mean value of the switching points B_OFFSET = (B_ON + B_OFF) / 2
Changes to the previous edition:
– specification for 140 °C and 170 °C added
16
Micronas