WMSIC Electronic Components

HGSEMI LM311M/TR LM311M

ModelLM311M/TR
PackageSOP-8
BrandHGSEMI
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 25+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
HGSEMI LM311M / TR
Type
HGSEMI
Minimum package
2500 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
HGSEMI
Electronic Component
LM311M/TR
Electronic Component
1
Package
SOP-8
Electronic Component
Comparator
Electronic Component
0.225g
Power Supply
5V~30V
Electronic Component
1
Electronic Component
BM0227636598
Operating Temperature
45℃~+85℃
Comparator
Electronic Component
Static Current(Iq)
7.5mA
(tpd)
300ns
Electronic Component
Electronic Component
Electronic Component
2500

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

LM311M/TR 产品概述

一、概述与定位

LM311M/TR(HGSEMI 华冠)是一款单路电压比较器,面向需要中等速度响应和宽温度范围的工业级应用。器件工作温度范围为 -45℃ 至 +85℃,适用于汽车级/工业级环境。封装为 SOP-8,便于 PCB 布局与自动化贴片生产。

二、主要规格参数

  • 工作温度:-45℃ ~ +85℃
  • 静态电流 (Iq):7.5 mA(典型)
  • 电源:双电源工作,典型 ±15V;最大电源宽度 (Vdd - Vss):36V
  • 传播延迟 (tpd):300 ns(典型)
  • 输入失调电压 (Vos):7.5 mV(典型)
  • 输入偏置电流 (Ib):250 nA(典型)
  • 输入失调电流 (Ios):50 nA(典型)
  • 比较器数:单路
  • 封装:SOP-8

三、关键特性与优势

  • 宽温度工作范围,适合工业环境及恶劣工况。
  • 中等功耗:静态电流 7.5 mA,兼顾响应速度与功耗控制。
  • 300 ns 的传播延迟能满足多数断电检测、零交叉检测、阈值比较等中速场景。
  • 输入偏置与失调参数在一般控制与检测电路中足够,并可通过外部电路优化精度。
  • 单路设计便于在多通道系统中采用多个器件并行布局。

四、典型应用

  • 电平检测与阈值触发(过流、过压报警)
  • 零交叉检测与相位检测
  • PWM 比较、脉冲整形与单稳/多谐振荡器电路
  • 模拟开关控制、传感器输出判决
  • 工业控制与信号采集前端的缓冲比较

五、设计与使用要点

  • 输出:LM311 类比较器通常采用开路集电极输出,使用时需外部上拉电阻并注意上拉电压不得超过器件允许的电压范围。
  • 电源注意:双电源工作时常用 ±15V;器件允许的最大电源差为 36V,设计时不得超过该限值以免损伤器件。
  • 精度优化:输入失调电压约 7.5 mV,若需更高精度,可采用前级放大或差分配对与外部校准电路降低影响。
  • 抗抖动:在慢速或噪声环境下,建议在反馈回路中加入迟滞(正反馈)以避免输出抖动。
  • 布局与滤波:输入端应做好去耦与滤波,电源端加旁路电容以减少瞬态干扰对比较门限的影响。

六、封装与可靠性

  • SOP-8 封装适合自动贴片与批量生产,注意焊接温度与回流曲线以保证可靠性。
  • 推荐在 PCB 设计中为器件的电源和地提供低阻抗回路,输入线路尽量缩短并远离强干扰信号线。

七、结论与建议

HGSEMI LM311M/TR 是一款稳定、通用的单路比较器,适合中速检测与控制场景。在需要更高精度或更快响应的应用中,应结合前端放大或选用高速/高精度比较器。设计时注意上拉电阻、电源极限与输入去耦,以保证长期可靠运行。

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