DATA SHEET
HAL 525, HAL 526
4. Type Description
Applications
<
The HAL 525 is an optimal sensor for applications
with alternating magnetic signals such as:
<
4.1. HAL 525
– multipole magnet applications,
– rotating speed measurement,
– commutation of brushless DC motors, and
– window lifter.
<
The HAL 525 is a latching sensor (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 out-
put does not change if the magnetic field is removed.
For changing the output state, the opposite magnetic
field polarity must be applied.
Output Voltage
VO
For correct functioning in the application, the sensor
requires both magnetic polarities (north and south) on
the branded side of the package.
BHYS
VOL
Magnetic Features:
B
– switching type: latching
BOFF
0
BON
– low sensitivity
Fig. 4–1: Definition of magnetic switching points for
the HAL 525
<
– typical BON: 14 mT at room temperature
– typical BOFF: −14 mT at room temperature
– operates with static magnetic fields and dynamic
magnetic fields up to 10 kHz
<
Note: :HAL 525 is not available for new designs.
Please use HAL 526 instead.
– 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
19
MICRONAS [ MICRONAS ]
