Dynamic, Self-Calibrating, Peak-Detecting, Differential
 Hall Effect Gear Tooth Sensor IC
ATS617LSG
4
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
OPERATING CHARACTERISTICS (continued) over operating voltage and temperature range, unless otherwise noted
Characteristic
Symbol
Test Condition
Min.  Typ.
1
Max.  Unit
Performance Characteristics (continued)
Initial Calibration Cycle
5
n
cal
Output edges before calibration is completed, at f
sig
 < 100 Hz      1       edge
Calibration Mode Disable
n
dis
Output falling edges for startup calibration to be complete   64   64   64   edge
Relative Timing Accuracy, Sequential
6,7
E
?/DIV>
Target Speed = 1000 rpm, B
AG(p-p)
 > 100 G
   ?.5  ?.75  deg.
Target Speed = 1000 rpm, B
AG(p-p)
 > 60 G
       ?.5  deg.
Allowable User Induced Differential Offset
4
B
App
Output switching only; may not meet data sheet specifica-
tions
       ?0   G
Switching Hysteresis, Start-up
V
SWHYS(su)
   190      mV
Switching Hysteresis, Running Mode    V
SWHYS(rm)
   105      mV
1
Typical data is at V
CC
 = 12 V and T
A
 = 25癈. Performance may vary for individual units, within the specified maximum and minimum limits.
2
 Maximum voltage must be adjusted for power dissipation and junction temperature; see Power Derating section.
3
 This performance is not dominated by the design of the ATS617, it is determined primarily by the external interface circuitry.
4
1 G (gauss) = 0.1 mT (millitesla), exactly.
5
 Non-uniform magnetic profiles may require additional edges before calibration is complete.
6
For Allegro 60+2 reference target.
7
Accuracy may be compromised during the calibration cycle.
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