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

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Fabricante

AK8776

Hall IC for Pulse Encoder

Asahi Kasei Microdevices 

[AK8776]

Behaviors of internal signal A,B and output signal F, D when a rotating magnetic field is applied on AK8776

F signal (pulse) is correspond to the result of internal signal A and B. And D signal (direction) is given by looking up

the state of signal A and B.

Direction changed

Direction changed

BopV

Vertical M.F.D. ＊

BrpV

t

BopH

Horizontal M.F.D.

BrpH

t

Supply voltage VDD

t

Internal signal A

(Vertical)

t

Internal signal B

(Horizontal)

t

F (Pulse)

t

D (Direction)

t

Undefined (High or Low)

F,D signal is determined.

Figure 4. Behaviors of internal signal A,B and output signal F, D

when a rotating magnetic field is applied on AK8776

*M.F.D. is Magnetic Flux Density.

Note) D signal is determined after one pulse sent out of F signal. The section which the output status is undefined

appears only in the starting up of this device.

MS1317-E-00

6

2011/July

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