KA2822D datasheet(3/15 Pages) FAIRCHILD

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KA2822D

Pin Definitions

Pin Number

Pin Name

I/O

Pin Function Description

FG_INPUT

Negative input pin FG signal amp.

AGC

Automatic gain control input pin

INDEX PULSE WIDTH

Index pulse width detection (1.1V) pin

VOLTAGE REGULATOR

Voltage (2.2V) generator output pin

INDEX BURST

Index pulse width detection (1.4V) pin

INDEX OUTPUT

Index pulse output pin

Chip enable (Active low)

SIGNAL GROUND

Signal ground

FG ZERO CROSS

FG signal zero cross detection pin

FG OUTPUT

FG signal output pin

RPM SELECT

RPM selection pin (L: 300, H: 360rpm)

CHARGE PUMP OUTPUT

Charge pump output pin

OSC INPUT

1MHz oscillation input pin

No connection

PHASE COMPENSATION

Phase compensation cap. connection pin

VCC

5V power supply pin

CURRENT DETECTION2

Over current detection pin

U INPUT (

−)

Negative input pin of U phase amp

U INPUT (+)

Positive input pin of U phase amp

No connection

W PHASE OUTPUT

W phase output pin

V PHASE OUTPUT

V phase output pin

U PHASE OUTPUT

U phase output pin

U INPUT (+)

Positive input pin of V phase amp

V INPUT (

−)

Negative input pin of V phase amp

CURRENT DETECTION1

Over current detection pin

HALL BIAS

Hall sensor bias input pin

FG INPUT (+)

Positive input pin of FG signal amp

FIN

POWER GROUND

Power ground

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