A1642LK View Datasheet(PDF) - Allegro MicroSystems
Part Name
Description
MFG CO.
A1642LK
Allegro MicroSystems
'A1642LK' PDF : 13 Pages View PDF
A1642LK
Two-Wire True Zero-Speed Miniature Differential Peak-Detecting Sensor with Continuous Calibration
Characteristic Allowable Air Gap Movement
Allowable Air Gap Movement from TEAGCAL*
1.2
1.0
0.8
0.6
0.4
0.2
0
-0.2
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8
ΔTEAGIN (mm)
*Data based on study performed using spur gear reference target 60-0, and
applicable to ring magnet targets with similar magnetic characteristics.
The colored area in the chart above shows the region of allow-
able air gap movement within which the sensor will continue
output switching. The output duty cycle is wholly dependent on
the target’s magnetic signature across the air gap range of move-
ment, and may not always be within specification throughout the
entire operating region (to AG(OPmax)).
The axis parameters for the chart are defined in the draw-
ings below. As an example, assume the case where the air gap
is allowed to vary from from the nominal installed air gap
(TEAGCAL, panel a) within the range defined by an increase of
ΔTEAGOUT = 0.35 mm (shown in panel b), and a decrease of
ΔTEAGIN = 0.65 mm (shown in panel c). This case is plotted
with an “x” in the chart above.
For more information on these figures and the calculations used
to generate them, please refer to the Applications Note Deter-
mining Allowable Air Gap Variation for the ATS642.
(a)
(b)
(c)
Sensor
TEAGCAL
Sensor
TEAGOUT
Sensor
TEAG IN
A1642LK-DS
Allegro MicroSystems, Inc.
6
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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