AK8779B Datasheet, PDF (6/13 Pages) Asahi Kasei Microsystems – Hall Effect IC for Pulse Encoders

[AK8779B]
10. Operating Characteristics
10.1. Definition of Vertical Magnetic Field
The OUTA signal switches ‘L’ (ON) when the magnetic field perpendicular to the marking side of the
package exceeds BopV. When the magnetic field is reduced below BrpV, the OUTA goes ‘H’ (OFF).
Otherwise; that is, in case of the magnetic field strength is greater than BrpV and smaller than BopV;
OUTA keeps its status.
Line Marking
OUTA signal
BhV
N ^{BrpV 0}
B
BopV _S
Figure 4. Switching behavior of OUTA signal when vertical magnetic field is applied
10.2. Definition of Horizontal Magnetic Field
The OUTB signal switches ‘L’ (ON) when the magnetic field parallel to the marking side of the package
exceeds BopH. When the magnetic field is reduced below BrpH, the OUTB goes ‘H’ (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
OUTB signal
BhH
N ^{BrpH 0}
B
BopH _S
Figure 5. Switching behavior of the OUTB signal when horizontal magnetic field is applied
015001034-E-02
-6-
2015/10