HAL320 Datasheet, PDF (15/22 Pages) List of Unclassifed Manufacturers – Differential Hall Effect Sensor IC

DATA SHEET
HAL320
3.7. Magnetic Characteristics at T_J = –40 °C to +170 °C, V_DD = 4.5 V to 24 V
Typical Characteristics for V_DD = 12 V
Magnetic flux density values of switching points (Condition: –10 mT < B₀ < 10 mT)
Positive flux density values refer to the magnetic south pole at the branded side ot the package. ΔB = B_S1 – B_S2
Parameter
On point ΔB_ON
ΔB > ΔB_ON
Off point ΔB_OFF
ΔB < ΔB_OFF
Hysteresis
ΔB_HYS = ΔB_ON – ΔB_OFF
Offset ΔB_OFFSET = (ΔB_ON + ΔB_OFF)/2
Min.
–40 °C
Typ.
Max.
Min.
–1.5
1.2 2.5
-1.5
25 °C
Typ.
1.2
Max.
170 °C
Unit
Min. Typ. Max.
2.5 –2.5
1.1
3.5 mT
–2.5 –0.6 1.5
–2.5 –0.6
1.5 –3.5 –0.4
2.5 mT
1
1.8
4
1
1.8
4
0.8
1.5
4
mT
–2
0.3
2
–2
0.3
2
–3
0.4
3
mT
In back-biased applications, sensitivity mismatch between the two Hall plates S₁ and S₂ can lead to an additional offset
of the magnetic switching points. In back-biased applications with the magnetic preinduction B₀, this sensitivity mis-
match generates the magnetic offset ΔB_OFFSETbb = |S₁ – S₂|/S₁ @ B₀ + ΔB_OFFSET.
Parameter
–40 °C 25 °C 170 °C
Sensitivity mismatch¹⁾
|S₁ – S₂|/S₁
1.5²⁾
1.0²⁾
0.5²⁾
1) _{Mechanical stress from packaging can influence sensitivity mismatch.}
2) _{All values are typical values.}
Unit
%
The magnetic switching points are checked at room temperature at a magnetic preinduction of B₀ = 150 mT.
These magnetic parameters may change under external pressure and during the lifetime of the sensor.
Parameter
On point ΔB_ONbb
Off point ΔB_OFFbb
Hysteresis ΔB_HYS
Offset ΔB_OFFSETbb
Min.
25 °C
Typ.
Unit
Max.
–4.5
1.5
5.5 mT
–5.5 –0.3
4.5 mT
1
1.8
4
mT
–5
0.6 +5
mT
V_OH
Output Voltage
V_OL
DB_{OFF min}
DB_OFF 0 DB_ON
DB_{ON max}
DB_HYS
ΔB = B_S1 – B_S2
Fig. 3–7: Definition of switching points and hysteresis
Micronas
15