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參數(shù)資料
| 型號(hào)： | A1425LK-T |
| 廠商： | Allegro MicroSystems, Inc. |
| 元件分類： | 速度傳感器和接近開關(guān) |
| 英文描述： | High Accuracy Analog Speed Sensor with Integrated Filter Capacitor and Dual Zero-Crossing Output Signal |
| 中文描述： | 高精度模擬集成濾波電容器和雙零速傳感器輸出信號(hào)通道 |
| 文件頁數(shù)： | 1/13頁 |
| 文件大?。?/td> | 600K |
| 代理商： | A1425LK-T |
A1425
A1425a-DS
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Senses motion of ring magnet or ferrous targets
Integrated
fi
lter capacitor
Wide operating temperature range
Operation with magnetic input signal frequency from 20 Hz to 20 kHz
Resistant to EMI
Large effective air gaps
4.0 to 26.5 V supply operating range
Output compatible with both TTL and CMOS logic families
Reverse battery protection
Resistant to mechanical and thermal stress
Accurate true zero crossing switchpoint
The A1425 ac-coupled Hall-effect sensor is a monolithic integrated circuit that
switches in response to changing differential magnetic
fi
elds created by rotating
ring magnets and, when coupled with a magnet, by ferrous targets. The device is
a true zero-crossing detector: the output switches precisely when the difference in
magnetic
fi
eld strength between the two Hall elements is zero. A unique dual-com-
parator scheme provides for accurate switching at the zero crossing on both the
positive and negative-going regions of the differential signal, while utilizing hys-
teresis to prevent false switching. The zero-crossing nature of this device provides
excellent repeatability and accuracy for crankshaft applications.
Changes in
fi
eld strength at the device face, which are induced by a moving
target, are sensed by the two integrated Hall transducers. The transducers generate
signals that are differentially ampli
fi
ed by on-chip electronics. This differential
sensing design provides immunity to radial vibration within the operating air gap
range of the A1425, by rejection of the common mode signal. Steady-state magnet
and system offsets are eliminated using an on-chip differential band-pass
fi
lter.
This
fi
lter also provides relative immunity to interference from electromagnetic
sources.
The device utilizes advanced temperature compensation for the high-pass
fi
lter,
sensitivity, and Schmitt trigger switchpoints, to guarantee optimal operation to low
frequencies over a wide range of air gaps and temperatures.
Each Hall effect digital integrated circuit includes a voltage regulator, two Hall
effect sensing elements, temperature compensating circuitry, a low-level ampli
fi
er,
band-pass
fi
lter, Schmitt trigger, and an output driver, which requires a pull-up
resistor. The on-board regulator permits operation with supply voltages from
4.0 to 26.5 V. The output stage can easily switch 20 mA over the full frequency
response range of the sensor, and is compatible with both TTL and CMOS logic
circuits.
The device is packaged in a 4-pin plastic SIP. The lead (Pb) free version (suffix
–T) has a 100% matte tin plated leadframe.
ABSOLUTE MAX MUM RAT NGS
Supply Voltage*, V
CC
........................................
28 V
Reverse-Supply Voltage, V
RCC
........................
–18 V
Continuous Output Current, I
OUT
...................
25 mA
Continuous Reverse-Output Current, I
ROUT
.
–50 mA
Operating Temperature
Ambient, T
A
................................
–40oC to 150oC
Maximum Junction, T
J(max)
........................
165oC
Storage Temperature, T
S
..................
–65oC to 170oC
*Refer to Power Derating section.
Package K, 4-pin SIP
Features and Bene
fi
ts
1
2
3
4
High Accuracy Analog Speed Sensor with Integrated Filter Capacitor
and Dual Zero-Crossing Output Signal
1. VCC
2. VOUT
3. TEST
4. GND
相關(guān)PDF資料 |
PDF描述 |
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| A1425 | High Accuracy Analog Speed Sensor with Integrated Filter Capacitor and Dual Zero-Crossing Output Signal |
| A1425LK | High Accuracy Analog Speed Sensor with Integrated Filter Capacitor and Dual Zero-Crossing Output Signal |
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| A1441 | Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Element Commutation |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| A1425-PQ160C | 制造商:Microsemi SOC Products Group 功能描述: |
| A1428AG1 | 制造商:DBLECTRO 制造商全稱:DB Lectro Inc 功能描述:DIP PLUG PITCH:2.54mm |
| A1428AG2 | 制造商:DBLECTRO 制造商全稱:DB Lectro Inc 功能描述:DIP PLUG PITCH:2.54mm |
| A1428AS1 | 制造商:DBLECTRO 制造商全稱:DB Lectro Inc 功能描述:DIP PLUG PITCH:2.54mm |
| A1428AS2 | 制造商:DBLECTRO 制造商全稱:DB Lectro Inc 功能描述:DIP PLUG PITCH:2.54mm |
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