DATA SHEET
HAL 525, HAL 526
4.2. HAL 526
Applications
The HAL 526 is a latching sensor (see Fig. 4–5).
The HAL 526 is an optimal sensor for applications with
alternating magnetic signals such as:
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 out-
put does not change if the magnetic field is removed.
For changing the output state, the opposite magnetic
field polarity must be applied.
– multipole magnet applications,
– rotating speed measurement,
– commutation of brushless DC motors, and
– window lifter.
For correct functioning in the application, the sensor
requires both magnetic polarities (north and south) on
the branded side of the package.
Output Voltage
VO
BHYS
Magnetic Features:
– switching type: latching
VOL
– low sensitivity
B
– typical BON: 14 mT at room temperature
– typical BOFF: −14 mT at room temperature
BOFF
0
BON
Fig. 4–5: Definition of magnetic switching points for
– operates with static magnetic fields and dynamic
magnetic fields up to 10 kHz
the HAL 526
– typical temperature coefficient of magnetic switching
points is −2000 ppm/K
Magnetic Characteristics at TJ = −40 °C to +140 °C, VDD = 3.8 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
Off point B
Typ.
Hysteresis B
HYS
Magnetic Offset
Unit
ON
OFF
T
Min.
11.8
11
Typ.
15.8
14
Max.
19.2
17
Min.
Max.
Min.
Typ.
31.6
28
Max.
Min.
Typ.
Max.
J
−40 °C
25 °C
−19.2
−17
−15.8
−14
−11.8
−11
27.4
24
35.8
32
0
0
0
0
mT
mT
mT
mT
−2
2
100 °C
140 °C
8
11
15.5
14
−15.5
−14
−11
−8
18.5
16
22
28.7
26
6.5
10
−10
−6.5
20
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
Nov. 30, 2009; DSH000144_003EN
21
MICRONAS [ MICRONAS ]
