WMSIC Electronic Components

TECH PUBLIC LM321MFX

ModelLM321MFX
PackageSOT-23-5
BrandTECH PUBLIC
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 26+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
TECH PUBLIC LM321MFX
Type
TECH PUBLIC
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
TECH PUBLIC
Electronic Component
LM321MFX
Electronic Component
1
Package
SOT-23-5
Electronic Component
Operational Amplifier
Electronic Component
0.036g
Electronic Component
1
Features
Built-in
Electronic Component
BM0227776286
Operating Temperature
40℃~+125℃
Amplifier
1
Output Current
20mA
Power Supply Voltage
3V~36V
Static Current(Iq)
700uA
Electronic Component
Electronic Component

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

LM321MFX 运算放大器产品概述

一、产品简介

LM321MFX 是 TECH PUBLIC(台舟电子)提供的一款单路通用低功耗运算放大器,采用 SOT-23-5 小型封装,面向空间受限与电源有限的便携与工业应用。器件支持宽电源电压并具有良好的共模抑制能力与温度稳定性,适合信号调理与放大场合。

二、主要参数与特性

  • 共模抑制比(CMRR):80 dB(典型/最小规格用于系统设计时请参考完整数据表)
  • 最大电源宽度(Vdd–Vss):36 V
  • 单电源工作范围:3 V ~ 36 V
  • 双电源工作范围(Vee~Vcc):±20 V
  • 输入失调电压(Vos):11 mV
  • 输入失调电压温漂(Vos TC):50 µV/℃
  • 输入偏置电流(Ib):250 nA
  • 输入失调电流(Ios):2 nA
  • 输入失调电流温漂(Ios TC):10 pA/℃
  • 静态电流(Iq):700 µA(典型)
  • 工作温度范围:-40 ℃ ~ +125 ℃
  • 放大器数:单路
  • 封装:SOT-23-5

三、封装与引脚(概览)

SOT-23-5 小封装利于高密度 PCB 布局,适用于手持设备、便携测量与通用信号处理模块。引脚包括电源、反相/同相输入与输出,常见布局配合去耦电容即可获得稳定性能。

四、典型应用场景

  • 传感器接口与信号调理(温度、压力、光电等小信号放大)
  • 便携式与电池供电设备的前端放大器
  • 低速滤波器、积分器与工控模拟电路
  • 通用比较放大、驱动小负载的缓冲电路(注意输入/输出电平与负载能力)

五、设计注意事项与建议

  • 电源旁路:为保证稳定性与低噪声,电源引脚应靠近器件放置 0.1 µF 与 1 µF 旁路电容。
  • 偏置电流影响:输入偏置电流在几百纳安范围,连接高阻抗传感器时需注意偏置电流产生的输入误差与漂移,必要时使用偏置补偿或降低源阻抗。
  • 失调与温漂:Vos 约 11 mV,Vos TC 50 µV/℃,高精度测量应用建议采用后期校准或外部补偿方案。
  • 热管理:器件可在 -40 ℃ 到 +125 ℃ 工作,但长期高温工况会影响漂移与可靠性,应注意散热与 PCB 设计。
  • 输入保护:若可能遭受过压或电流注入,考虑加入限流电阻或钳位结构保护输入端。

六、结论

LM321MFX 以其宽电源范围、低静态电流与小型封装,适合多种通用放大与传感器前端应用。设计时关注偏置电流与失调漂移的影响,并做好电源旁路与热设计,可在便携与工业级温度范围内实现可靠的模拟信号处理效果。如需用于关键精度场合或高频应用,请参考完整数据手册以确认动态特性与极限参数。

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