True Zero Speed, Low Jitter, High Accuracy
Position Sensor IC
ATS627LSG
4
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Relative Timing Accuracy, Sequential
Mechanical Falling Edges
ERR
FF
0.5 mm d AG d 2.5 mm; constant target speed,
Running mode; relative to measurement taken
at AG = 1.5 mm
?.4 deg.
Relative Timing Accuracy, Signature
Mechanical Rising Edge
ERR
SIGR
0.5 mm d AG d 2.5 mm; constant target speed,
Running mode; relative to measurement taken
at AG = 1.5 mm
?.4 deg.
Relative Timing Accuracy, Signature
Mechanical Falling Edge
ERR
SIGF
0.5 mm d AG d 2.5 mm; constant target speed,
Running mode; relative to measurement taken
at AG = 1.5 mm
?.5 deg.
Relative Repeatability, Sequential
Rising and Falling Edges
6
T
楨
0.5 mm d AG d 2.5 mm
0.08 deg.
Output Propagation Delay
t
d(OUT)
See figure 1
20
約
Initial Edge Accuracy
7
Edge Accuracy First and Second
Output Edges
See figure 2
T
TARGET
T
TARGET
deg.
Edge Accuracy Third through Sixth
Output Edges
See figure 2
0.5 x
T
TARGET
+0.5 x
T
TARGET
deg.
Full Edge Accuracy
Output edge count (see figure 2),
B
SIG
/ B
SEQ
= 1, or no signature tooth encountered
6
Output edge count (see figure 2), signature
region encountered during calibration, and
B
SIG
/ B
SEQ
` 1
9
Input Magnetic Characteristics
Allowable Differential Sequential
Signal Variation
8
B
SEQ(min)
/
B
SEQ(max)
Total variation over 60 cycles (see figure 3)
0.5
B
SEQ(n+1)
/
B
SEQ(n)
Single cycle-to-cycle variation (see figure 3)
0.6
Allowable Signature Amplitude Ratio
B
SIG
/
B
SEQ
One instance per target revolution (see figure 3) 0.8
1.6
1
Typical values are at T
A
= 25癈 and V
CC
= 12 V.
2
Maximum voltage must be adjusted for power dissipation and junction temperature; see Power Derating section.
3
Negative current is defined as current coming out of (sourced from) the specified device terminal.
4
Sustained voltages beyond the clamp voltage may cause permanent damage to the IC.
5
1 G (gauss) = 0.1 mT (millitesla).
6
The repeatability specification is based on statistical evaluation of a sample population, evaluated at 1000 Hz.
7
Power-on frequencies d 200 Hz. Higher power-on frequencies may result in a delay of full output accuracy or undetected target edges.
8
Excludes effects caused by signature region.
OPERATING CHARACTERISTICS (continued) Valid through full operating supply voltage and ambient temperature ranges, using
Reference Target 60+2; unless otherwise specified
Characteristics
Symbol
Test Conditions
Min. Typ.
1
Max. Unit
Performance Characteristics (continued)
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