AK8776 Ver la hoja de datos (PDF) - Asahi Kasei Microdevices

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componentes Descripción

Fabricante

AK8776

Hall IC for Pulse Encoder

Asahi Kasei Microdevices 

[AK8776]

Operational Characteristics

AK8776 detects the “vertical” (perpendicular to the marking side of the package) magnetic field, and the resulting

internal signal A changes state. When the magnetic field is more positive than BopV, the internal signal A 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 internal signal A changes to ‘High’ state. Those threshold magnetic flux density levels are defined

in Table 6.

S

Top(Marking)

Bottom

N

Internal signal A

BhV

BrpV

0

N [ｍT]

BopV

S [ｍT]

Figure 2. Switching behavior of internal signal A when vertical

magnetic field is applied

AK8776 detects “horizontal “(parallel to the marking side of the package) magnetic field, and the resulting internal

signal B changes state. When the magnetic field is more positive than BopH, the internal signal B 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 internal signal B changes to ‘High’ state. Those threshold magnetic flux density levels are defined in

Table 6.

Line Marking

Top(Marking)

N

VSS pin

S

Internal signal B

BhH

BrpH

BopH

Bottom

D pin

0

N [ｍT]

S [ｍT]

Figure 3. Switching behavior of internal signal B

when horizontal magnetic field is applied

MS1317-E-00

5

2011/July

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