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LX INA181A3IDBVR(LX) INA181A3IDBVR
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- LX INA181A3IDBVR(LX)
- Type
- LX
- Minimum package
- 3000 卷
Technical parameters
- Electronic Component
- LX
- Electronic Component
- INA181A3IDBVR(LX)
- Electronic Component
- 100V/V
- Electronic Component
- 1
- Package
- SOT-23-6
- Electronic Component
- Current Sense Amplifier
- Electronic Component
- 0.076g
- Electronic Component
- 1
- Common Mode Voltage
- 200mV~3V
- Electronic Component
- BM0264498263
- Operating Temperature
- 40℃~+125℃
- Voltage
- ±30V
- (-3dB)
- 150kHz
- Amplifier
- 1
- (SR)
- 6V/us
- Power Supply Voltage
- 2.7V~5.5V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
INA181A3IDBVR(LX) 产品概述
一、概述
INA181A3（LX，灵星芯微）是一款单通道、零漂移的双向电流检测放大器，内置自动稳零技术，适用于精密低侧/高侧电流检测场合。器件在单电源工作下提供100 V/V 固定增益、150 kHz 的带宽与较低的输入失调与温漂，兼顾精度与响应速度，适合电机驱动、电源管理与电池监测等应用。
二、主要参数
- 放大器数：1 通道
- 固定增益：100 V/V
- 带宽：150 kHz
- 共模电压范围：-200 mV ～ 3 V
- 差分电压耐受：±30 V（不损坏）
- 单电源电压：2.7 V ～ 5.5 V
- 静态电流 Iq：175 µA
- 输入偏置电流 Ib：6 µA
- 输入失调电压 Vos：25 µV；失调温漂 Vos TC：0.2 µV/°C
- 输入失调电流 Ios：0.05 µA
- 压摆率 SR：6 V/µs
- 共模抑制比 CMRR：100 dB
- 功能特性：双向检测、零漂移/自动稳零
- 封装：SOT-23-6
三、功能与优势
INA181A3 支持双向电流测量，适合测量有正负方向切换的负载电流；零漂移技术显著降低直流偏移与长期漂移，保证小电流测量的高精度；较宽的共模范围（含接地稍下）便于低侧检测；±30 V 差分耐受性提高了系统的鲁棒性，防止外部瞬态损坏器件。
四、典型应用场景
- 电机驱动电流反馈与过流保护
- 电池管理系统（BMS）与充放电监测
- 开关电源与模组电流采样
- 工业控制与传感器接口中的精密电流检测
五、设计建议与注意事项
- 由于固定增益为100，输入差分电压须控制在使输出不过饱和的范围内；设计分流电阻与测量量程时按增益换算输出摆幅。
- 布局上尽量缩短信号回路、使用 Kelvin 引脚连接分流电阻并在电源端加 0.1 µF 陶瓷去耦，减少噪声与寄生感应。
- 带宽 150 kHz 与 SR 6 V/µs 决定了器件对快速电流跃变的响应能力，复杂高速脉冲测量需评估环路带宽与取样方案。
- 在高共模或瞬态环境下，配合合适的输入滤波或 TVS 器件以保护器件并抑制干扰。
六、封装与型号信息
- 型号：INA181A3IDBVR(LX)
- 品牌：LX（灵星芯微）
- 封装：SOT-23-6，适合空间受限的板级应用。
该器件以低漂移、高精度和双向检测能力为特点，是对成本与精度有平衡需求的电流感测方案的优选。
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