DATA SHEET
HAL320
3.7. Magnetic Characteristics at T = –40 °C to +170 °C, V = 4.5 V to 24 V
J
DD
Typical Characteristics for V = 12 V
DD
Magnetic flux density values of switching points (Condition: –10 mT < B < 10 mT)
0
Positive flux density values refer to the magnetic south pole at the branded side ot the package. ΔB = B – B
S1
S2
Unit
Parameter
–40 °C
25 °C
170 °C
Min.
–1.5
Typ.
Max.
2.5
Min.
-1.5
Typ.
Max.
Min.
–2.5
Typ.
Max.
On point ΔB
1.2
–0.6
1.8
1.2
–0.6
1.8
2.5
1.1
–0.4
1.5
3.5
mT
mT
mT
mT
ON
ΔB > ΔB
ON
Off point ΔB
–2.5
1
1.5
4
–2.5
1
1.5
4
–3.5
0.8
–3
2.5
4
OFF
ΔB < ΔB
OFF
Hysteresis
ΔB = ΔB – ΔB
OFF
HYS
ON
Offset ΔB
= (ΔB + ΔB )/2
OFF
–2
0.3
2
–2
0.3
2
0.4
3
OFFSET
ON
In back-biased applications, sensitivity mismatch between the two Hall plates S and S can lead to an additional offset
1
2
of the magnetic switching points. In back-biased applications with the magnetic preinduction B , this sensitivity mis-
0
match generates the magnetic offset ΔB
= |S – S |/S @ B + ΔB
.
OFFSETbb
1
2
1
0
OFFSET
Parameter
–40 °C
25 °C
170 °C
Unit
1)
2)
2)
2)
Sensitivity mismatch
|S – S |/S
1
1.5
1.0
0.5
%
1
2
1)
2)
Mechanical stress from packaging can influence sensitivity mismatch.
All values are typical values.
The magnetic switching points are checked at room temperature at a magnetic preinduction of B = 150 mT.
0
These magnetic parameters may change under external pressure and during the lifetime of the sensor.
Parameter
25 °C
Unit
Min.
–4.5
–5.5
1
Typ.
Max.
5.5
4.5
4
On point ΔB
Off point ΔB
1.5
–0.3
1.8
mT
mT
mT
mT
ONbb
OFFbb
Hysteresis ΔB
HYS
Offset ΔB
–5
0.6
+5
OFFSETbb
Output Voltage
V
OH
V
OL
DB
DB
0
DB
DB
ON max
OFF min
OFF
ON
DB
HYS
ΔB = B – B
S1
S2
Fig. 3–7: Definition of switching points and hysteresis
Micronas
15
MICRONAS [ MICRONAS ]
