A1125EUA-T

更新时间： 2024-02-02 05:32:31

品牌	Logo	应用领域
急速微 - ALLEGRO		开关传感器换能器磁场传感器输出元件信息通信管理
页数	文件大小	规格书
13页	305K
描述
Chopper Stabilized Precision Hall Effect Switches

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技术参数
数据手册

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A1125EUA-T 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	SIP
包装说明：	SIP3,.02,50	针数：	3
Reach Compliance Code：	compliant	HTS代码：	8542.39.00.01
风险等级：	0.65	Is Samacsys：	N
其他特性：	AEC-Q100; SHORT CIRCUIT PROTECTION	主体宽度：	1.52 mm
主体高度：	4.12 mm	主体长度或直径：	4.09 mm
外壳：	PLASTIC	滞后：	1 mT
输入模式：	UNIPOLAR	JESD-609代码：	e3
最大磁场范围：	5 mT	最小磁场范围：	0.5 mT
安装特点：	THROUGH HOLE MOUNT	端子数量：	3
最大工作电流：	4 mA	最高工作温度：	150 °C
最低工作温度：	-40 °C	输出：	OPEN-DRAIN
输出电路类型：	TRANSISTOR	最大输出电流：	60 mA
输出范围：	30-60mA	输出类型：	CURRENT OUTPUT
封装主体材料：	PLASTIC/EPOXY	封装等效代码：	SIP3,.02,50
封装形状/形式：	RECTANGULAR	筛选级别：	AEC-Q100
传感器/换能器类型：	MAGNETIC FIELD SENSOR,HALL EFFECT	最大供电电压：	24 V
最小供电电压：	3 V	表面贴装：	NO
技术：	BICMOS	端子面层：	Matte Tin (Sn)
端接类型：	SOLDER	Base Number Matches：	1

A1125EUA-T 数据手册

A1120, A1121

and A1125

Chopper Stabilized Precision Hall Effect Switches

The chopper stabilization technique uses a 400 kHz high fre-

quency clock. For demodulation process, a sample and hold

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

chopper frequency (800 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.

Chopper Stabilization Technique

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 ele-

ment. This makes it difficult to process the signal while main-

taining 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 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 applications, Allegro

recommends its digital device 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. Model of chopper stabilization technique

Allegro MicroSystems, Inc.

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

1...7 8 91011 12 13

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与A1125EUA-T相关器件

型号	品牌	描述	获取价格	数据表
A1125LLHLT-T2	ALLEGRO	Chopper-Stabilized Precision Hall-Effect Switches	获取价格
A1125LLHLX-T	ALLEGRO	Chopper Stabilized Precision Hall Effect Switches	获取价格
A1125LUA-T	ALLEGRO	Chopper Stabilized Precision Hall Effect Switches	获取价格
A1125RW	MPD	Miniature, 10W DIP Single & Dual Output DC/DC Converters	获取价格
A1126	ALLEGRO	The A1126 integrated circuit is an omnipolar, ultrasensitive Hall-effect switch with a dig	获取价格
A1126	EPCOS	AC Film Capacitors Lighting	获取价格

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