ATS685LSH datasheet(5/15 Pages) ALLEGRO

5 / 15 page

Two-Wire, Zero Speed

Differential Gear Tooth Sensor IC

ATS685LSH

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

Reference Gear Magnetic Profile

Reference Target 60-0, Hall element spacing 2.20 mm

Gear Rotation (°)

Air Gap (mm)

600

400

200

400

600

0.50 mm AG

3.00 mm AG

0.50

0.75

1.00

1.25

1.50

1.75

2.00

2.25

2.50

2.75

3.00

1200

1000

800

600

400

200

Reference Gear Magnetic Gradient Amplitude versus Air Gap

Reference Target 60-0, Hall element spacing 2.20 mm

Air Gap (mm)

Reference Target 60-0 (60 Tooth Target)

Characteristics

Symbol

Test Conditions

Typ.

Units

Symbol Key

Outside Diameter

Outside diameter of target

120

DO ht

Branded Face

of Package

Air Gap

Face Width

Breadth of tooth, with respect

to branded face

6mm

Angular Tooth Thickness

Length of tooth, with respect

to branded face

deg.

Angular Valley Thickness

Length of valley, with respect

to branded face

deg.

Tooth Whole Depth

3mm

Material

Low Carbon Steel

–

Reference Target

60-0

of Package

Branded Face

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