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HGSEMI LM397M5/TR LM397M5
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- HGSEMI LM397M5 / TR
- Type
- HGSEMI
- Minimum package
- 3000 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- HGSEMI
- Electronic Component
- LM397M5/TR
- Electronic Component
- 1
- Package
- SOT-23-5
- Electronic Component
- Comparator
- Electronic Component
- 0.036g
- Power Supply
- 5V~30V
- Electronic Component
- 1
- Features
- Built-in
- Electronic Component
- BM0264801290
- Operating Temperature
- 40℃~+85℃
- Comparator
- Electronic Component
- Output Type
- Electronic Component
- Static Current(Iq)
- 300uA
- (tpd)
- 440ns
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
LM397M5/TR 产品概述
一、简介
LM397M5/TR（品牌：HGSEMI/华冠）是一款单通道电压比较器，封装为 SOT-23-5，适用于单电源或双电源系统。器件输入共模范围包含地电位，支持单电源 5 V 至 30 V 或双电源 ±15 V，工作温度范围为 -40 ℃ 至 +85 ℃。LM397 设计注重低功耗与宽工作电压，使其在电池供电及工业电源监控等场景中表现优异。
二、主要特性
- 单路比较器，内置迟滞（可减小输入抖动、改善抗干扰性）
- 输入失调电压 Vos：2 mV（典型）
- 输入偏置电流 Ib：7 nA；输入失调电流 Ios：1.6 nA
- 静态电流 Iq：约 300 μA（与电源电压关系小）
- 传播延迟 tpd：约 440 ns（中速响应）
- 输出类型：开集电极（需外接上拉电阻）
- 最大供电差分（Vdd–Vss）：30 V（绝对最大值）
- 单电源工作：5 V 至 30 V；双电源工作：±15 V
- 工作温度范围：-40 ℃ 至 +85 ℃
- 封装：SOT-23-5，适合紧凑电路板设计
三、电气参数要点
- 低电流消耗：静态电流在典型工作条件下仅约 300 μA，适合低功耗系统。
- 低失调与低偏置：2 mV 的输入失调电压和 nA 级的偏置电流，利于高精度阈值检测。
- 开集电极输出：可与不同电平的逻辑接口兼容，但需外接上拉电阻；适用于与微控制器、继电器驱动或光耦接口连接。
- 内置迟滞：在有噪声或慢变化输入信号时能有效防止输出抖动，简化外部按键/传感器去抖电路设计。
四、典型应用
- 电池电压检测与电源监控
- 门限/窗口比较（电平检测、过压/欠压保护）
- 零交叉检测与交流波形成形（需考虑速度要求）
- 低速模拟信号的数字化前端（模数转换器采样触发）
- 工业控制、家电与便携设备中的阈值检测
五、设计建议与封装信息
- 上拉电阻：输出为开集电极，设计时需选定合适上拉电阻与上拉电压，兼顾响应速度与功耗。
- 电源去耦：建议近 VCC 引脚放置 0.1 μF 陶瓷去耦电容以提高瞬态稳定性并抑制振荡。
- 输入保护：输入端不要超过电源轨超过 0.3 V（或参考厂商限制），在可能出现高电压冲击的场合增设限流或钳位保护。
- 布局注意：高速或高噪声信号应远离比较器输入，地线宜做星形或短回路以减少噪声耦合。
- 封装信息：SOT-23-5 小型封装有利于空间受限的 PCB 设计，适合表面贴装工艺。
LM397M5/TR 以其宽供电范围、低静态电流和包含地共模能力，适合多种工业与消费电子应用中的精确阈值检测场景。选用时请结合具体拓扑和噪声环境调整上拉/迟滞参数以获得最佳性能。
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