ats643 Allegro MicroSystems, Inc., ats643 Datasheet - Page 5

• Manufacturer Part Number: ats643
• Description: Ats643lsh Self-calibrating Zero-speed Differential Gear Tooth Sensors With Continuous Update
• Manufacturer: Allegro MicroSystems, Inc.

ATS643LSH
*Differential B corresponds to the calculated difference in the magnetic fi eld as
sensed simultaneously at the two Hall elements in the device (B
REFERENCE TARGET, 60-0 (60 Tooth Target)
Outside Diameter
Face Width
Circular Tooth Length
Circular Valley Length
Tooth Whole Depth
Material
Characteristics
1800
1600
1400
1200
1000
800
600
400
200
0
0.5
Reference Gear Magnetic Gradient Amplitude
-100
-200
-300
-400
-500
-600
-700
700
600
500
400
300
200
100
with Reference to Air Gap
0
Symbol
0
D
h
F
t
t
1
v
o
t
1
AG (mm)
Outside diameter of target
Breadth of tooth, with respect
to sensor
Length of tooth, with respect
to sensor; measured at D
Length of valley, with respect
to sensor; measured at D
Low Carbon Steel
2
1.5
Test Conditions
Reference Gear Magnetic Profile
Two Tooth-to-Valley Transitions
Gear Tooth Sensor with Continuous Update
3
Self-Calibrating, Zero-Speed Differential
4
Gear Rotation (°)
DIFF
2
5
= B
o
o
E1
6
– B
E2
Typ.
120
).
7
2.5
6
3
3
3
–
2.00 mm AG
0.50 mm AG
8
Units
mm
mm
mm
mm
mm
Reference Target
Branded Face
–
9
of Sensor
10
60-0
11
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
12
Symbol Key
AG (mm)
0.50
0.75
1.00
1.25
1.50
1.75
2.00
5