Quality Standards and Environmental Certifications

A3290 与 A3291：用于消费和工业应用的稳定斩波型精密霍尔效应锁存器

A3290 和 A3291 数据表
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Description

A3290 和 A3291 霍尔效应锁存器是极端温度稳定和抗应力的传感器 IC，特别适合在较大的温度范围内进行工作（最高可达 125°C）。该器件利用动态偏移消除技术降低通常由器件封装超模压、温度依存性及热应力引起的剩余偏移电压，实现卓越的高温性能。除了磁性开关点不同，这两个器件完全相同。这些器件不适用于汽车应用。

这两种器件在单硅片上包含以下元件：稳压器、霍尔电压发生器、小型信号放大器、稳定斩波特技术、施密特触发器，以及带短路保护的开漏极输出（最大灌电流 25 mA）。若要打开输出，必须提供强度足够的南极磁场。关闭输出需要强度足够的磁北极。电路板稳压器允许在 3 至 24 伏特的电源电压范围内工作。

两种封装类型都能为大多数应用提供磁性优化的封装。LH 型是 SOT23W 微型扁平表面安装型封装，而 UA 型是供通孔安装使用的三引脚超小型 SIP。两种封装均为无铅封装，采用 100% 雾锡电镀引脚框。

Top Features

  • 对称的开关点
  • 对物理应力不敏感
  • 非凡的温度稳定性
  • 输出短路保护
  • 能以未稳压电源运行
  • 电池反接保护
  • 固态可靠性
  • 小型封装尺寸
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Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant		 Part Composition /
RoHS Data		 Comments Samples Check Stock
A3290KLHLT-T 3-lead SOT -40°C to 125°C Yes View Data Contact your
local sales rep		 Check
Distributor Stock
A3290KLHLX-T 3-lead SOT -40°C to 125°C Yes View Data Contact your
local sales rep		 Check
Distributor Stock
A3290KUA-T 3-lead SIP -40°C to 125°C Yes View Data Contact your
local sales rep		 Check
Distributor Stock
A3291KLHLT-T 3-lead SOT -40°C to 125°C Yes View Data Contact your
local sales rep		 Check
Distributor Stock
A3291KLHLX-T 3-lead SOT -40°C to 125°C Yes View Data Contact your
local sales rep		 Check
Distributor Stock
A3291KUA-T 3-lead SIP -40°C to 125°C Yes View Data Contact your
local sales rep		 Check
Distributor Stock

Allegro 的产品不允许在任何由于 Allegro 产品的合理故障造成人身伤害的装置或系统中使用，包括但不限于生命支持装置或系统。

Packaging

两种封装类型都能为大多数应用提供磁性优化的封装。LH 型是 SOT23W 微型扁平表面安装型封装，而 UA 型是供通孔安装使用的三引脚超小型 SIP。两种封装均为无铅封装，采用 100% 雾锡电镀引脚框。

Packages

见解和创新

Semiconductors (general)

Hall-Effect IC Applications Guide

Allegro MicroSystems uses the latest integrated circuit technology in combination with the century-old Hall effect to produce Hall-effect ICs. These are contactless, magnetically activated switches and sensor ICs with the potential to simplify and improve electrical and mechanical systems.

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Semiconductors (general)

Allegro MicroSystems - Soldering Methods for Allegro Products (SMD and Through-Hole)

本文档描述了典型的焊接方法that have been proven effective with Allegro™ products. It provides information on SMD (surface mount devices) and through-hole packages. Both lead (Pb) free and traditional Pb-based technologies are examined.

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Packaging

Guidelines for Designing Subassemblies Using Hall-Effect Devices

This document covers most of the assembly methods used for mounting Hall-effect devices. In Allegro® Hall-effect devices, the signal is conditioned and optimized for various types of magnetic inputs to produce a suitable electrical output.

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Semiconductors (general)

Handling, Storage, and Shelf Life of Semiconductor Devices

Electronic devices are available in many package types and can contain semiconductors (integrated circuits), magnets, capacitors, and resistors. This application note provides guidelines for the handling and storage of Allegro devices with regards to functionality and shelf life. Precautions ...

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Packaging

Allegro Microsystems - Chemical Exposure of Devices

This application note discusses the types of situations and applications that can give rise to failure of the device from corrosion.

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Semiconductors (general)

Allegro Hall-Effect Sensor ICs

This note provides a basic understanding of the Hall effect and how Allegro designs and implements Hall technology in packaged semiconductor monolithic integrated circuits.

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Semiconductors (general)

Integrating Hall-Effect Magnetic Sensing Technology into Modern Household Appliances

As technology improves, Hall-effect sensor ICs are finding their way into many modern household appliances. The Hall effect refers to the measurable voltage that appears across a conductive material.

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Switch and Latch

Latching Switch Hall-Effect IC Basics

There are four general categories of Hall-effect IC devices that provide a digital output: unipolar switches, bipolar switches, omnipolar switches, and latches. Latching Hall-effect sensor ICs, often referred to as "latches," are digital output Hall-effect switches that latch output states.

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