WMSIC Electronic Components

UMW LM75BD

ModelLM75BD
PackageSOIC-8
BrandUMW
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 Date code within 2 years

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
UMW LM75BD
Type
UMW
Minimum package
4000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
UMW
Electronic Component
LM75BD
Electronic Component
1
Package
SOIC-8
Electronic Component
Temperature Sensor
Electronic Component
±3℃
Electronic Component
0g
Electronic Component
1
Electronic Component
BM0227324870
Operating Voltage
2.8V~5.5V
Interface Type
I2C
Electronic Component
55℃~+125℃
Resolution
11bit
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.

LM75BD 数字本地温度传感器(UMW / 友台半导体)

一、产品概述

LM75BD 是 UMW(友台半导体)推出的一款数字式本地温度传感器,采用 SOIC-8 封装,面向要求体积小、接口简单且兼容 I2C 总线的温度测量场合。器件工作温度范围为 -55℃ 至 +125℃,整体精度为 ±3℃(满量程),温度转换时间仅 10 ms,温度转换分辨率为 11-bit,供电电压范围宽(2.8V ~ 5.5V),可直接与 3.3V 或 5V 系统兼容使用,适用于工业、通信、仪器仪表及消费电子等多种场景。

二、主要特点

  • 工作温度范围:-55℃ ~ +125℃
  • 测量精度:±3℃(声明值,具体精度随温区与校准条件变化)
  • 供电电压:2.8V ~ 5.5V,兼容 3.3V / 5V 系统
  • 接口类型:I2C(标准 2 线串行接口)
  • 温度转换时间:10 ms(快速响应)
  • 分辨率:11-bit(典型 LSB = 0.125℃)
  • 封装形式:SOIC-8,便于 PCB 布局和批量贴装
  • 本地(芯片内部)测温,抗干扰能力好,器件属于数字输出型,便于上位系统读取与处理

三、典型电气与测量参数

  • 电源电压(VCC):2.8 V ~ 5.5 V
  • 静态与工作功耗:受测量周期和 I2C 访问频率影响,通常在低功耗设计中可通过休眠/关断访问降低系统能耗(具体数值请参考器件数据手册)
  • 分辨率:11-bit,最小可区分温度步距约 0.125℃
  • 温度测量范围:-55℃ ~ +125℃
  • 温度转换时间:约 10 ms(单次转换)
  • 精度(典型):标称 ±3℃(全量程校准精度,具体精度曲线与漂移请参阅规格书)

注:上表为基于基础参数的典型说明;在关键应用中应参考器件完整数据手册并进行实测验证。

四、接口与寄存器(使用提示)

  • 通讯:标准 I2C 双线(SDA、SCL),支持主从模式。器件通常采用 7-bit 地址架构,器件地址位可通过外部地址引脚配置,便于在同一总线上挂载多个传感器。
  • 寄存器:一般包含温度寄存器、配置寄存器、阈值寄存器(如上/下限报警设定)等,软件读取温度寄存器即可获得当前测量值(以两补码或指定格式输出)。
  • 读取时序:注意按 I2C 标准时序进行读写,读取温度数据后需按寄存器格式解析为实际温度(结合分辨率与符号位)。

五、封装与机械信息

  • 封装:SOIC-8,适合自动化贴装与回流焊工艺。
  • 引脚功能:电源、地、SDA、SCL、地址位(若有)、中断/报警输出(部分型号提供开漏报警输出)等;具体引脚定义请参阅产品引脚图。

六、典型应用领域

  • 工业控制与环境监测:温度采集与过温保护
  • 通信设备与服务器机箱热管理
  • 电源与功率模块温度监控
  • 消费类电子与便携设备的温度测量
  • 仪器仪表与医疗设备的温度监控(需按行业规范验证)

七、设计建议与注意事项

  • 去耦与电源滤波:在 VCC 与 GND 之间放置 0.1 µF 陶瓷去耦电容,尽量靠近芯片电源引脚,以抑制电源噪声。
  • PCB 布局:将器件放置在被测对象附近以获得快速响应,避免在热源或冷源旁直接放置导致误差;若需测量环境温度,请注意周边器件的热影响。
  • I2C 总线设计:若布线较长或挂载设备较多,应考虑上下拉电阻、总线速率及信号完整性,必要时增加滤波或缓冲。
  • 校准与温漂:若系统对温度精度要求高于 ±3℃,建议进行出厂或系统级校准,并关注长期漂移与自热效应。
  • 报警与中断:若使用阈值报警功能,请正确配置报警寄存器并处理开漏输出(如需外接上拉电阻)。

八、采购与兼容

  • 型号:LM75BD(UMW / 友台半导体)
  • 封装:SOIC-8
  • 若需替代:可考虑功能与接口类似的数字温度传感器(注意比较分辨率、精度、工作电压与封装),但在替代前请确认寄存器 map 与报警/地址机制的兼容性。

如需我为您生成接线示意、寄存器读写示例(I2C 代码片段)、或对特定温度区间的精度与漂移进行分析,请告诉目标应用与系统要求(供电、电磁环境、测量目标位置),我可以给出更具体的硬件与软件建议。

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