ATS616LSG Allegro MicroSystems, ATS616LSG Datasheet - Page 4

• Manufacturer Part Number: ATS616LSG
• Description: Dynamic Self-Calibrating Peak-Detecting Differential Hall Effect Gear Tooth Sensor
• Manufacturer: Allegro MicroSystems

www.datasheet4u.com
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, t
• Valley depth, h
• Tooth thickness, F ≥ 3 mm
• Target material must be low carbon steel
ATS616LSG-DS, Rev. 1
REFERENCE TARGET 60+2
Outside Diameter
Face Width
Circular Tooth Length
Signature Region Cir-
cular Tooth Length
Circular Valley Length
Tooth Whole Depth
Material
Dynamic Self-Calibrating Peak-Detecting Differential Hall Effect Gear Tooth Sensor
Characteristics
v
t
> 2 mm
> 2 mm
Symbol
t
D
SIG
h
F
t
t
v
o
t
Branded Face
Figure 1. Configuration with Radial-Tooth Reference Target
Outside diameter of target
Breadth of tooth, with respect
to sensor
Length of tooth, with respect
to sensor; measured at D
Length of signature tooth,
with respect to sensor; mea-
sured at D
Length of valley, with respect
to sensor; measured at D
of Sensor
Low Carbon Steel
Reference Target (Gear) Information
Reference Target
60+2
Test Conditions
o
Pin 4
Pin 1
ATS616LSG
o
o
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, h
tooth width, t, valley width, t
material specification need only be considered for reference. For
example, F can now be < 3 mm.
Typ.
120
15
6
3
3
3
–
Units
mm
mm
mm
mm
mm
mm
–
Signature Region
Branded Face
of Sensor
t
, is intrinsically infinite, so the criteria for
Air Gap
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
v
, tooth material thickness, F, and
Symbol Key
4