True Zero-Speed Low-Jitter High Accuracy
Gear Tooth Sensor IC
ATS625LSG
4
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
OPERATING CHARACTERISTICS with 60+2 reference target
Operational Air Gap
AG
Measured from package branded face to
target tooth
0.5    
2.5    mm
Relative Timing Accuracy, Sequen-
tial Mechanical Rising Edges
ERR
RR
Relative to measurement taken at
AG = 1.5 mm

    ?.4    deg.
Relative Timing Accuracy, Sequen-
tial Mechanical Falling Edges
ERR
FF
Relative to measurement taken at
AG = 1.5 mm

    ?.4    deg.
Relative Timing Accuracy, Signa-
ture Mechanical Rising Edge
4
ERR
SIGR
Relative to measurement taken at
AG = 1.5 mm

    ?.4    deg.
Relative Timing Accuracy, Signa-
ture Mechanical Falling Edge
5
ERR
SIGF
Relative to measurement taken at
AG = 1.5 mm

    ?.5    deg.
Relative Repeatability, Sequential
Rising and Falling Edges
6
T
360?Repeatability, 1000 edges; peak-peak
sinusoidal signal with B
PEAK
 e B
IN(min)
 and
6?period

    0.08    deg.
Operating Signal
7
B
IN
AG
(min)
 < AG < AG
(max)
60    

G
1
 Test condition is I
CC(max)
+ 3 mA.
2
 Upper limit is I
CC(max)
+ 3 mA.
3
 Power-on speed d 200 rpm. Refer to the Device Description section for information on start-up behavior.
4
 Detection accuracy of the update algorithm for the first rising mechanical edge following a signature region can be adversely affected by the magnetic
bias of the signature region. Please consult with Allegro field applications engineering for aid with assessment of specific target geometries.
5
 Detection accuracy of the update algorithm for the falling edge of the signature region is highly dependent upon specific target geometry. Please consult
with Allegro field applications engineering for aid with assessment of specific target geometries.
6
 The repeatability specification is based on statistical evaluation of a sample population.
7
 Peak-to-peak magnetic flux strength required at Hall elements for complying with operational characteristics.
Operating Characteristics, continued Valid at T
A
 = 40癈 to 150癈, T
J
d T
J(max)
, over full range of AG, unless otherwise noted;
typical operating parameters: V
CC
 = 12 V and T
A
 = 25癈
Characteristic
Symbol
Test Conditions
Min.   Typ.   Max.   Units
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