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
A1425LK-T
功能描述:IC SENSOR HALL EFFECT AC 4-SIP RoHS:是 类别:传感器，转换器 >> 磁性 - 霍尔效应，数字式开关，线性，罗盘 (IC) 系列:- 标准包装:1 系列:- 传感范围:20mT ~ 80mT 类型:旋转 电源电压:4.5 V ~ 5.5 V 电流 - 电源:15mA 电流 - 输出（最大）:- 输出类型:数字式，PWM，8.5 位串行 特点:可编程 工作温度:-40°C ~ 150°C 封装/外壳:20-SSOP（0.209"，5.30mm 宽） 供应商设备封装:20-SSOP 包装:Digi-Reel® 其它名称:AS5132-HSST-500DKR
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
A1428AT1
制造商:DBLECTRO 制造商全称:DB Lectro Inc 功能描述:DIP PLUG PITCH:2.54mm
A1428AT2
制造商:DBLECTRO 制造商全称:DB Lectro Inc 功能描述:DIP PLUG PITCH:2.54mm