ATS616LSG View Datasheet(PDF) - Allegro MicroSystems
Part Name
Description
MFG CO.
ATS616LSG
Allegro MicroSystems
'ATS616LSG' PDF : 14 Pages View PDF
ATS616LSG
Dynamic Self-Calibrating Peak-Detecting Differential
Hall Effect Gear Tooth Sensor IC
Reference Target (Gear) Information
REFERENCE TARGET 60+2
Characteristics
Symbol
Test Conditions
Typ. Unit
Outside Diameter
Face Width
Circular Tooth Length
Signature Region Cir-
cular Tooth Length
Circular Valley Length
Tooth Whole Depth
Material
Do
Outside diameter of target
120 mm
F
Breadth of tooth, with respect
6 mm
to branded face
Length of tooth, with respect to
t
3 mm
branded face; measured at Do
Length of signature tooth,
tSIG with respect to branded face;
measured at Do
15 mm
Length of valley, with respect
tv
to branded face; measured
at Do
3 mm
ht
3 mm
Low Carbon Steel
–
–
Symbol Key
Branded Face
of Package
tV
ØDO F
ht
Air Gap
Signature Region
Pin 4
Pin 1
Branded Face
of Package
Reference Target
60+2
Figure 1. Configuration with Radial-Tooth Reference Target
For the generation of adequate magnetic field levels, the fol-
lowing recommendations should be followed in the design and
specification of targets:
• 2 mm < tooth width, t < 4 mm
• Valley width, tv > 2 mm
• Valley depth, ht > 2 mm
• Tooth thickness, F ≥ 3 mm
• Target material must be low carbon steel
Although these parameters apply to targets of traditional
geometry (radially oriented teeth with radial sensing, shown in
figure 1), they also can be applied in applications using stamped
targets (an aperture or rim gap punched out of the target mate-
rial) and axial sensing. For stamped geometries with axial sens-
ing, the valley depth, ht, is intrinsically infinite, so the criteria for
tooth width, t, valley width, tv, tooth material thickness, F, and
material specification need only be considered for reference. For
example, F can now be < 3 mm.
Allegro MicroSystems, Inc.
4
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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