AK8778 Datasheet, PDF (4/12 Pages) Asahi Kasei Microsystems – HALL EFFECT IC FOR PULSE ENCODERS

Electrical Characteristics
[AK8778]
Table 5. Electrical characteristics at V_DD=4.0 to 24.0V, Ta= 40 to +115C
Parameter
Symbol Min. Typ. Max. Unit
Note
Current consumption
I_DD
0.7
1.4
2.5
mA
Average
Output saturation voltage
V_SAT
0.4
V
F, D pin, I_SINK= 15mA
Output leak current
I_LEAK
10
mA
F, D=V_DD
Pulse drive period
T_PD1
24.4
48.8
97.6
ms
Pulse drive duration time
T_PD2
12.2
24.4
48.8
ms
Magnetic Characteristics
Table 6. Magnetic characteristics at V_DD=4.0 to 24.0V, Ta= 40 to +115C
Parameter
Symbol
Min.
Typ.
Max.
Unit
Operating point of
vertical magnetic field
BopV
0.1
2.5
6.0
mT
Releasing point of
vertical magnetic field
BrpV
6.0
2.5
0.1
mT
Operating point of
horizontal magnetic field
BopH
0.1
2.5
6.0
mT
Operating point of
horizontal magnetic field
BrpH
6.0
2.5
0.1
mT
Hysteresis
BhV, BhH
5.0
mT
Note
(*1)
(*1)
(*2)
(*2)
(*1), (*2)
(*1) Horizontal magnetic flux density is zero.
(*2) Vertical magnetic flux density is zero.
MS1467-E-00
September 2012
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