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参数资料
| 型号： | A1425LK-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 1/13页 |
| 文件大小： | 404K |
| 描述： | IC SENSOR HALL EFFECT AC 4-SIP |
| 产品培训模块： | Current Sensor |
| 标准包装： | 4,000 |
| 传感范围： | 11G 跳闸，-11G 释放 |
| 类型： | 专用型 |
| 电源电压： | 4 V ~ 26.5 V |
| 电流 - 电源： | 7mA |
| 电流 - 输出（最大）： | 25mA |
| 输出类型： | 数字，开路集电极 |
| 特点： | 高精度 |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | 4-SIP |
| 供应商设备封装： | 4-SIP |
| 包装： | 散装 |
Description
The A1425 AC-coupled Hall-effect sensor IC is a monolithic
integrated circuit that switches in response to changing
differential magnetic fields 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 field strength between the
two Hall elements is zero. A unique dual-comparator scheme
provides for accurate switching at the zero crossing on both the
positive and negative-going regions of the differential signal,
while utilizing hysteresis to prevent false switching. The zero-
crossing nature of this device provides excellent repeatability
and accuracy for crankshaft applications.
Changes in field 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 amplified by on-chip electronics. This differential
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 filter.
This filter also provides relative immunity to interference from
electromagnetic sources.
1425-DSa, Rev.3
Features and Benefits
? Used in sensing motion of ring magnet or ferrous targets
? Integrated filter 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
High Accuracy Analog Speed Sensor IC with Integrated Filter
Capacitor and Dual Zero-Crossing Output Signal
Continued on the next page&
Package: 4 pin SIP (suffix K)
Functional Block Diagram
A1425
Hall
Amp
Regulator
Bandpass Filter Integrated
Tracking Capacitor
VOUT
(Pin 2
)
VCC
(Pin 1)
GND
(Pin 4)
0.1 uF
V
S
+
Diagnostic
Circuitry
Gain
Stage
Dual Hall
Transducers
Comparator
TEST
(Pin 3)
(Required)
V
REF
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相关代理商/技术参数 |
参数描述 |
|---|---|
| A1425-PQ160C | 制造商:Microsemi SOC Products Group 功能描述: |
| A1428AG1 | 制造商:DBLECTRO 制造商全称:DB Lectro Inc 功能描述:DIP PLUG PITCH:2.54mm |
| A1428AG2 | 制造商:DBLECTRO 制造商全称:DB Lectro Inc 功能描述:DIP PLUG PITCH:2.54mm |
| A1428AS1 | 制造商:DBLECTRO 制造商全称:DB Lectro Inc 功能描述:DIP PLUG PITCH:2.54mm |
| A1428AS2 | 制造商:DBLECTRO 制造商全称:DB Lectro Inc 功能描述:DIP PLUG PITCH:2.54mm |
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