HAL505
22
Micronas
4.5. HAL505
The HAL505 is a latching sensor (see Fig. 4
–
17).
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
does not change if the magnetic field is removed. For
changing the output state, the opposite magnetic field
polarity must be applied.
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: latching
–
low sensitivity
–
typical B
ON
: 13.5 mT at room temperature
–
typical B
OFF
:
–
13.5 mT at room temperature
–
operates with static magnetic fields and dynamic mag-
netic fields up to 10 kHz
–
typical temperature coefficient of magnetic switching
points is
–
1000 ppm/K
Applications
The HAL505 is the optimal sensor for applications with
alternating magnetic signals such as:
–
multipole magnet applications,
–
rotating speed measurement,
–
commutation of brushless DC motors, and
–
window lifter.
Fig. 4
–
17:
Definition of magnetic switching points for
the HAL505
B
HYS
Output Voltage
0
B
OFF
B
ON
V
OL
V
O
B
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
On point B
ON
Typ.
Off point B
OFF
Min.
Typ.
Hysteresis B
HYS
Min.
Typ.
Magnetic Offset
Min.
Typ.
Unit
Min.
Max.
Max.
Max.
Max.
–
40
°
C
11.8
15
18.3
–
18.3
–
15
–
11.8
26
30
34
0
mT
25
°
C
11
13.5
17
–
17
–
13.5
–
11
24
27
32
–
1.5
0
1.5
mT
100
°
C
10.2
12.4
16.6
–
16.6
–
12.4
–
10.2
22
24.8
31.3
0
mT
140
°
C
9.7
12
16.3
–
16.3
–
12
–
9.7
21
24.2
31.3
0
mT
170
°
C
9.4
11.7
16.1
–
16.1
–
11.7
–
9.4
20
23.4
31.3
0
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