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PDF AK8775 Data sheet ( Hoja de datos )
| Número de pieza | AK8775 | |
| Descripción | Hall IC | |
| Fabricantes | AKM | |
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[AK8775]
AK8775
Hall IC for Pulse Encoder
Overview
AK8775 is a Hall effect latch which detects both “vertical” and “horizontal”(perpendicular and parallel to the
marking side of the package) magnetic field at the same time. The result of Hall effect latch operation in vertical and
horizontal magnetic field is read out to OUTA pin and OUTB pin. AK8775 is for use in portable devices which uses
rotational detection system or incremental pulse encoder such as jog dial utilized for input devices.
Features
o 1.6 to 5.5V operation
o Bop, Brp (Vertical, Horizontal) ±1.5mT(Typ.), Highly sensitive
o Low power operation : Average 90μA(Typ.) @VDD=3V
o Two outputs : OUTA (detects vertical magnetic field), OUTB (detects horizontal magnetic field)
o Small package: SOP-4pin, Halogen free
MS1316-E-00
2011/July
1
Free Datasheet http://www.datasheet4u.com/
1 page  
[AK8775]
Operational Characteristics
AK8775 detects the “vertical” (perpendicular to the marking side of the package) magnetic field, and the resulting
output signal OUTA changes state. When the magnetic field is more positive than BopV, the signal OUTA changes
to ‘Low’ state. And it is kept while the magnetic field remains more positive than BrpV. When the magnetic field
drops below BrpV, the signal OUTA changes to ‘High’ state. Those threshold magnetic flux density levels are
defined in Table 6.
Top(Marking)
S
Bottom
N
Output
BhV
BrpV
N [ｍT]
0
BopV
S [ｍT]
Figure 2. Switching behavior of output signal OUTA
when vertical magnetic field is applied
AK8775 detects “horizontal “(parallel to the marking side of the package) magnetic field, and the resulting output
signal OUTB changes state. When the magnetic field is more positive than BopH, the signal OUTB changes to
‘Low’ state. And it is kept while the magnetic field remains more positive than BrpH. When the magnetic field drops
below BrpH, the signal OUTB changes to ‘High’ state. Those threshold magnetic flux density levels are defined in
Table 6.
Line Marking
Top(Marking)
N
VSS pin
S
Output
BhH
BrpH
BopH
Bottom
OUTB pin
N [ｍT]
0
S [ｍT]
Figure 3. Switching behavior of output signal OUTB
when horizontal magnetic field is applied
MS1316-E-00
2011/July
5
Free Datasheet http://www.datasheet4u.com/
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet AK8775.PDF ] | |
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