A1141LLH

更新时间： 2024-01-20 12:56:36

品牌	Logo	应用领域
急速微 - ALLEGRO		模拟IC 开关信号电路光电二极管信息通信管理
页数	文件大小	规格书
11页	392K
描述
Sensitive Two-Wire Chopper-Stabilized Unipolar Hall-Effect Switches

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A1141LLH 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
零件包装代码：	SIP	包装说明：	SIP,
针数：	3	Reach Compliance Code：	compliant
HTS代码：	8542.39.00.01	风险等级：	5.83
模拟集成电路 - 其他类型：	ANALOG CIRCUIT	JESD-30 代码：	R-PSIP-T3
JESD-609代码：	e3	长度：	4.105 mm
功能数量：	1	端子数量：	3
最高工作温度：	150 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	SIP
封装形状：	RECTANGULAR	封装形式：	IN-LINE
峰值回流温度（摄氏度）：	260	认证状态：	Not Qualified
座面最大高度：	5.26 mm	最大供电电压 (Vsup)：	24 V
最小供电电压 (Vsup)：	3.5 V	标称供电电压 (Vsup)：	12 V
表面贴装：	NO	技术：	BICMOS
温度等级：	AUTOMOTIVE	端子面层：	Matte Tin (Sn)
端子形式：	THROUGH-HOLE	端子节距：	1.27 mm
端子位置：	SINGLE	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	1.52 mm	Base Number Matches：	1

A1141LLH 数据手册

A1140/41/42/43

Sensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches

Chopper Stabilization Technique

ing in a 400 kHz chop frequency. This high-frequency opera-

tion allows a greater sampling rate, which results in higher

accuracy and faster signal-processing capability. This approach

desensitizes the chip to the effects of thermal and mechani-

cal stresses, and produces devices that have extremely stable

quiescent Hall output voltages and precise recoverability after

temperature cycling.

When using Hall-effect technology, a limiting factor for switch-

point accuracy is the small signal voltage developed across the

Hall element. This voltage is disproportionally small relative to

the offset that can be produced at the output of the Hall sensor.

This makes it difﬁcult to process the signal while maintaining an

accurate, reliable output over the speciﬁed operating temperature

and voltage ranges.

Chopper stabilization is a unique approach used to minimize

Hall offset on the chip. The patented Allegro technique, namely

dynamic quadrature offset cancellation, removes key sources

of the output drift induced by thermal and mechanical stresses.

This offset reduction technique is based on a signal modulation-

demodulation process. The undesired offset signal is separated

from the magnetic ﬁeld-induced signal in the frequency domain,

through modulation. The subsequent demodulation acts as a

modulation process for the offset, causing the magnetic ﬁeld-

induced signal to recover its original spectrum at baseband, while

the dc offset becomes a high-frequency signal. The magnetic-

sourced signal then can pass through a low-pass ﬁlter, while the

modulated dc offset is suppressed.

This technique is made possible through the use of a BiCMOS

process, which allows the use of low-offset, low-noise ampli-

ﬁers in combination with high-density logic integration and

sample-and-hold circuits. This process is illustrated in ﬁgure 2.

The repeatability of magnetic ﬁeld-induced switching is

affected slightly by a chopper technique. However, the Allegro

high-frequency chopping approach minimizes the affect of

jitter and makes it imperceptible in most applications. Applica-

tions that are more likely to be sensitive to such degradation

are those requiring precise sensing of alternating magnetic

ﬁelds; for example, speed sensing of ring-magnet targets. For

such applications, Allegro recommends its digital sensor fami-

lies with lower sensitivity to jitter. For more information on

those devices, contact your Allegro sales representative.

The chopper stabilization technique uses a 200 kHz high fre-

quency clock. The chopping occurs on each clock edge, result-

Regulator

Clock/Logic

Low-Pass

Filter

Hall Element

Amp

Figure 2. Chopper stabilization circuit (dynamic quadrature offset cancellation)

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

A1140-DS

Worcester, Massachusetts 01615-0036 (508) 853-5000

www.allegromicro.com

1...4 5 678 9 10 11

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与A1141LLH相关器件

型号	品牌	描述	获取价格	数据表
A1141LLHLT	ALLEGRO	Analog Circuit, 1 Func, BICMOS, PDSO3, MINIATURE, SOT-23W, 3 PIN	获取价格
A1141LLHLT-T	ALLEGRO	Analog Circuit, 1 Func, BICMOS, PDSO3, MINIATURE, LEAD FREE, SOT-23W, 3 PIN	获取价格
A1141LUA	ALLEGRO	Sensitive Two-Wire Chopper-Stabilized Unipolar Hall-Effect Switches	获取价格
A1141LUA-T	ALLEGRO	Analog Circuit, 1 Func, BICMOS, PSIP3, ULTRA MINI, LEAD FREE, SIP-3	获取价格
A1141LUATI	ALLEGRO	Analog Circuit, 1 Func, BICMOS, PSIP3, ULTRA MINI, SIP-3	获取价格
A1141LUATI-T	ALLEGRO	Analog Circuit, 1 Func, BICMOS, PSIP3, ULTRA MINI, LEAD FREE, SIP-3	获取价格

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