ATS672LSB

SELF-CALIBRATING TPOS GEAR-TOOTH SENSOR WITH 9-BIT SIGNAL CAPTURE

Preliminary – Subject to Change

Rev. 1.2 May 1, 2002

Page 9 of 12

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

Copyright © 1993, 1995 Allegro MicroSystems, Inc.

Functional Block Diagram

Pin2

OUTPUT

STATE

THRESHOLD

COMPARATOR

VTHRESH

PDAC

OUTPUT

DRIVER

CLK

AGGRESSIVE

UPDATE

LOGIC

9-BIT

COUNTER

9-BIT PDAC

OUTPUT

STATE

COMP_P

DIFF

TPOS

OUTPUT

TPOS

TPOS

TRIM

HALL AMP

NDAC

DIFF

AUTOMATIC GAIN CONTROL

VREF

DIFF

CLK

AGGRESSIVE

UPDATE

LOGIC

9-BIT

COUNTER

9-BIT NDAC

OUTPUT

STATE

COMP_N

Internal

Regulator

(Analog)

Internal

Regulator

(Digital)

1M OSC

POR

OFFSET

ADJUST

TC

ADJUST

Offset

TC

LPF

THRESHOLD

OUTPUT

POWER ON

INITIALIZE

THRESHOLD

OUTPUT

Pin1

VCC