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參數(shù)資料
| 型號： | ATS645LSHTN-I2-T |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | True Zero Speed Miniature Gear Tooth Sensor |
| 中文描述： | 真正的零速微型齒輪齒傳感器 |
| 文件頁數(shù)： | 4/14頁 |
| 文件大?。?/td> | 418K |
| 代理商： | ATS645LSHTN-I2-T |
True Zero Speed Miniature Differential Peak-
Detecting Gear Tooth Sensor
ATS645LSH
4
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
OPERATING CHARACTERISTICS
(continued) using reference target 60-0, T
A
and V
CC
within speci
fi
cation, unless otherwise noted
Characteristic
Symbol
Test Conditions
Min.
Typ.
1
Max.
Units
SWITCHPOINT CHARACTERISTICS
Rotation Speed
S
ROT
Reference Target 60-0
0
–
8,000
rpm
Analog Signal Bandwidth
BW
Equivalent to f – 3dB
20
40
–
kHz
Operate Point
B
OP
Transitioning from I
CC(High)
to I
CC(Low)
; positive peak
referenced; AG < AG
MAX
Transitioning from I
CC(Low)
to I
CC(High)
; negative peak
referenced; AG < AG
MAX
–
120
–
mV
Release Point
B
RP
–
120
–
mV
CALIBRATION
Initial Calibration
C
I
Quantity of rising output (current) edges required for
accurate edge detection
–
–
3
Edge
DAC CHARACTERISTICS
Allowable User-Induced Differential
Offset
Output switching only; may not meet datasheet speci-
fi
cations
–60
–
60
G
FUNCTIONAL CHARACTERISTICS
5
Operational Air Gap Range
6
AG
DC within speci
fi
cation
0.5
–
2.75
mm
Maximum Operational Air Gap
Range
AG
OP(max)
Output switching (no missed edges);
DC not
guaranteed
Wobble < 0.5mm; Typical value at AG = 1.5 mm, for
max., min., AG within speci
fi
cation
–
–
3
mm
Duty Cycle Variation
7
DC
43
53
63
%
Operating Magnetic Flux Density
Differential
8
B
AG(p-p)
Operating within speci
fi
cation
30
–
1000
G
Minimum Operating Signal
Sig
OP(min)
Output switching (no missed edges);
DC not
guaranteed
20
–
–
G
1
Typical values are at T
= 25°C and V
= 12 V. Performance may vary for individual units, within the speci
fi
ed maximum and minimum limits.
2
Maximum voltage must be adjusted for power dissipation and junction temperature; see
Power Derating
section.
3
Power-On Time includes the time required to complete the internal automatic offset adjust. The DACs are then ready for peak acquisition.
4
dI is the difference between 10% of I
and 90% of I
, and dt is time period between those two points.
Note: di/dt is dependent upon the value of the bypass capacitor, if one is used.
5
Functional characteristics valid only if magnetic offset is within the speci
fi
ed range for Allowable User Induced Differential Offset.
6
AG is dependent on the available magnetic
fi
eld. The available
fi
eld is dependent on target geometry and material, and should be independently
characterized. The
fi
eld available from the reference target is given in the reference target parameter section of the datasheet.
7
Duty cycle speci
fi
cation may not be met if the magnetic signal during the calibration period is not representative of the installation air gap.
8
In order to remain in speci
fi
cation, the magnetic gradient must induce an operating signal greater than the minimum value speci
fi
ed. This includes the
effect of target wobble.
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