5

ATS642LSH-DS

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

115 Northeast Cutoff, Box 15036

www.allegromicro.com

Allegro MicroSystems, Inc.

True Zero Speed Miniature Differential Peak-Detecting Gear Tooth Sensor

ATS642LSH

REFERENCE TARGET, 60-0 (60 Tooth Target)

Characteristics

Symbol

Test Conditions

Typ.

Units

Symbol Key

Outside Diameter

Outside diameter of target

120

mm

F

Air Gap

Branded Face of Sensor

t

Face Width

F

Breadth of tooth, with

respect to sensor

6mm

Angular Tooth Thickness

t

Length of tooth, with

respect to sensor

3

deg

Angular Valley Thickness

Length of valley, with

respect to sensor

3

deg

Tooth Whole Depth

3mm

Material

Low Carbon Steel

–

–

Reference Gear Magnetic Gradient Amplitude

With Reference to Air Gap

Air Gap (mm)

0

100

200

300

400

500

600

700

800

11.5

2

0.5

2.5

3

Reference Gear Magnetic Profile

Two Tooth-to-Valley Transitions

-500

-400

-300

-200

-100

0

100

200

300

400

500

Gear Rotation (°)

024

6

8

10

12

0.50

(mm)

Air Gap

0.50 mm AG

3.00 mm AG

0.75

1.00

1.25

1.50

1.75

2.00

2.25

2.50

2.75

3.00

Reference Target

60-0

of Sensor

Branded Face