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 

Block Diagram

VDD

VSS

HALL SENSORS

BIAS

OSC

HE_DRIVE

TIMING LOGIC

CHOP_AMP

COMP

[AK8776]

F

D

Figure 1. Block diagram

Block

HALL SENSORS

CHOPPER_SW

CHOP_AMP

COMP

BIAS

HE_DRIVE

OSC

TIMING LOGIC

LATCH & LOGIC

Circuit Configuration

Table 1. Circuit configuration

Function

Two Hall elements fabricated by CMOS process.

Perform chopping in order to cancel the offset of Hall sensor.

Amplifies two Hall sensor output voltage with summation and subtraction

circuit.

Hysteresis comparator.

Generates bias current to other circuits.

Generates bias current for Hall sensors.

Generates operating clock.

Generates timing signal required for Chopper SW, AMP and COMP.

Logical circuits and CMOS output buffer.

MS1317-E-00

2

2011/July

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