WMSIC Electronic Components

DOWO LM358

ModelLM358
PackageSOP-8
BrandDOWO
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
DOWO LM358
Type
DOWO
Minimum package
4000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
DOWO
Electronic Component
LM358
Electronic Component
1
Package
SOP-8
Electronic Component
Operational Amplifier
Electronic Component
0.18g
Electronic Component
1
Electronic Component
BM0230826998
Operating Temperature
0℃~+70℃
Amplifier
2
Output Current
40mA
Power Supply Voltage
0V~32V
Static Current(Iq)
500uA
Electronic Component
Electronic Component
Electronic Component
4000

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

LM358 产品概述

一、产品简介

DOWO(东沃) 生产的 LM358 为双路运算放大器,采用 SOP-8 封装,面向通用模拟信号处理场景。器件支持较宽的电源电压范围,低静态功耗和较强的共模抑制能力,适用于工业控制、传感接口、仪表放大与信号整形等多种应用。

二、主要技术参数

  • 共模抑制比 (CMRR):90 dB
  • 最大电源宽度 (Vdd–Vss):32 V
  • 输入失调电压 (Vos):5 mV
  • 放大器数:双路(2 通道)
  • 输入偏置电流 (Ib):250 nA
  • 输入失调电流 (Ios):3 nA
  • 静态电流 (Iq):500 μA(典型)
  • 输出电流:40 mA(峰值驱动能力)
  • 单电源工作范围:0 V ~ 32 V
  • 双电源工作范围:−16 V ~ +16 V
  • 工作温度:0 ℃ ~ +70 ℃
  • 封装:SOP-8

三、性能特点与意义

  • 宽电源范围:支持单电源最高 32 V 或对称 ±16 V 双电源,便于与多种电源系统兼容,适合车载、工业电源或多电压系统。
  • 高共模抑制:90 dB 的 CMRR 能有效抑制来自电源或接地回路的共模噪声,提高差分信号测量的准确性。
  • 低静态功耗:500 μA 的静态电流利于低功耗设计,适用于对功耗敏感的电池供电系统。
  • 适中输入偏置电流:250 nA 的偏置电流要求输入源阻抗不宜过高,否则会引入较大的偏置误差;3 nA 的失调电流有利于匹配要求较高的电路。
  • 输出驱动能力:单通道可提供最高约 40 mA 的输出电流,能驱动常见的指示负载或小功率执行元件,但不适合高功率负载直接驱动。

四、典型应用场景

  • 传感器前端放大(温度、压力、应变等):在需要单电源工作的场景中可直接与传感器接口。
  • 仪表与数据采集模块:高 CMRR 有助于抑制环境干扰,提高测量精度。
  • 低功耗信号处理:静态功耗低,适合便携或电池供电设备。
  • 比较与简单滤波电路:双通道结构可实现两路独立放大或差分/级联配置。

五、设计与使用建议

  • 输入源阻抗:为减少偏置电流带来的误差,输入源阻抗建议保持在较低水平,或在输入端并联偏置补偿电阻以平衡偏置电流。
  • 失调校准:若对直流精度有较高要求,可通过输入端的偏置调整或外接微小补偿网络来降低失调影响。
  • 电源去耦:在电源引脚处采用适当的去耦电容(如 0.1 μF 与 10 μF 并联)以抑制噪声及瞬态响应,配合良好的接地布局提高共模抑制效果。
  • 输出负载:40 mA 为短时峰值驱动能力,长时间大电流输出会导致功耗与温升增加,必要时外接驱动器或缓冲器。

六、封装与可靠性

SOP-8 小型封装便于表面贴装与批量生产,常见 PCB 布局规则与标准 LM358 占板兼容。工作温度覆盖 0 ℃~+70 ℃,适应一般商业级与工业环境;若用于更宽温度范围或更严苛可靠性场合,建议选用相应温度等级或做热管理设计。

七、总结

DOWO 的 LM358 提供了宽电源范围、较高的共模抑制与低功耗特性,作为通用双路放大器,在传感器接口、信号调理和低功耗系统中具有良好适配性。设计时关注输入阻抗、失调补偿与电源滤波,可发挥器件最佳性能。若需更高精度或宽温度规格,请根据具体应用比较其他高性能型号或联系供应商获取详细数据手册。

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