AK8777B Datasheet, PDF (5/10 Pages) Asahi Kasei Microsystems – HALL EFFECT IC FOR PULSE ENCODERS

[AK8777B]
Operational Characteristics
The signal OUTA switches „Low‟ state (ON) when the magnetic field perpendicular to the marking side of the
package exceeds BopV. When the magnetic field is reduces below BrpV, the OUTA goes „High‟ state (OFF).
Otherwise; that is, in case of the magnetic field strength is greater than BrpV and smaller than BopV; OUTA keeps
its status.
S
Top(Marking)
Bottom
N
Signal OUTA
BhV
BrpV
0
N
BopV
S
Figure 2. Switching behavior of the signal OUTA when vertical magnetic field is applied
The signal OUTB switches „Low‟ state (ON) when the magnetic field parallel to the marking side of the package
exceeds BopH. When the magnetic field is reduces below BrpH, the OUTB goes „High‟ state (OFF). Otherwise; that
is, in case of the magnetic field strength is greater than BrpH and smaller than BopH; OUTB keeps its status.
Line Marking
Top(Marking)
N
VSS pin
S
Signal OUTB
BhH
BrpH
BopH
Bottom
0
OUTB pin
N
S
Figure 3. Switching behavior of the signal OUTB when horizontal magnetic field is applied
MS1465-E-00
September 2012
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