Datasheet > A1141LUA-T

A1141LUA-T

更新时间： 2024-02-24 05:31:14

品牌	Logo	应用领域
急速微 - ALLEGRO		信息通信管理
页数	文件大小	规格书
13页	344K
描述
Analog Circuit, 1 Func, BICMOS, PSIP3, ULTRA MINI, LEAD FREE, SIP-3

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A1141LUA-T 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：	ULTRA MINI, LEAD FREE, SIP-3
针数：	3	Reach Compliance Code：	unknown
HTS代码：	8542.39.00.01	风险等级：	5.81
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

A1141LUA-T 数据手册

Sensitive Two-Wire Chopper-Stabilized

Unipolar Hall Effect Switches

A1140, A1141,

A1142, and A1143

Chopper Stabilization Technique

The chopper stabilization technique uses a 200 kHz high

frequency clock. For demodulation process, a sample and hold

technique is used, where the sampling is performed at twice the

chopper frequency (400 kHz). This high-frequency operation

allows a greater sampling rate, which results in higher accuracy

and faster signal-processing capability. This approach desensi-

tizes the chip to the effects of thermal and mechanical stresses,

and produces devices that have extremely stable quiescent Hall

output voltages and precise recoverability after temperature

cycling. This technique is made possible through the use of a

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

amplifiers in combination with high-density logic integration

and sample-and-hold circuits.

When using Hall-effect technology, a limiting factor for

switchpoint 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 oper-

ating 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 configuration is illus-

trated 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. Applications 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 applica-

tions, Allegro recommends its digital sensor families with lower

sensitivity to jitter. For more information on those devices,

contact your Allegro sales representative.

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

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

www.allegromicro.com

1...5 6 789 10 11...13

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与A1141LUA-T相关器件

型号	品牌	描述	获取价格	数据表
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
A1141LUATI-T4	ALLEGRO	Sensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches	获取价格
A1142	ALLEGRO	Sensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches	获取价格
A1142ELH	ALLEGRO	Sensitive Two-Wire Chopper-Stabilized Unipolar Hall-Effect Switches	获取价格
A1142ELHLT	ALLEGRO	Analog Circuit, 1 Func, BICMOS, PDSO3, MINIATURE, SOT-23W, 3 PIN	获取价格

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