Dynamic, Self-Calibrating, Peak-Detecting, Differential

Hall Effect Gear Tooth Sensor IC

ATS617LSG

5

Allegro MicroSystems, Inc.

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

REFERENCE TARGET 60+2

Characteristics

Sym-

bol

Test Conditions

Typ.

Units

Symbol Key

Outside Diameter

Outside diameter of target

120

mm

F

Air Gap

Branded Face of Package

t

Face Width

F

Breadth of tooth, with respect

to branded face

6mm

Angular Tooth

Thickness

t

Length of tooth, with respect to

3

deg.

Signature Region

Angular Tooth

Thickness

Length of signature tooth, with

respect to branded face; mea-

15

deg.

Angular Valley

Thickness

Length of valley, with respect to

3

deg.

Tooth Whole Depth

3mm

Material

Low Carbon Steel

–

–

Reference Target

Signature Region

60+2

of Package

Branded Face

Pin 4

Pin 1

Reference Target (Gear) Information

Figure 1. Configuration with Radial-Tooth Reference Target