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[原创] TI ISO2245 kVRMS增强隔离放大器解决方案

关键词:电源管理 隔离放大器 信号采集系统 ISO224

时间:2019-01-21 10:59:36       作者:TI       来源:中电网

TI公司的ISO224是增强隔离放大器,输入和输出采用隔离层进行隔离,电流隔离高达5 kVRMS,单端输入±12 V,差分输出±4V,具有极好长寿命和低功耗,工作温度–40℃到 +125℃,主要用在电网自动化,保护继电器,工厂自动化和控制,轨道交通,马达驱动以及功率分析器.本文介绍了ISO224主要特性,框图,应用电路以及评估模块ISO224EVM主要特性,电路图,材料清单和PCB丝印图.

The ISO224 is a precision isolated amplifier with anoutput separated from the input circuitry by anisolation barrier with high immunity to magneticinterference. This barrier is certified to providereinforced galvanic isolation of up to 5 kVRMS with anexceptionally long lifetime and low power dissipation.

When used with isolated power supplies, this deviceseparates parts of the system that operate ondifferent common-mode voltage levels and protectslower-voltage devices from damage.

The input of the ISO224 is optimized for accuratesensing of ±10-V signals that are widely used inindustrial applications. The device operates of asingle supply on the high-side. This unique featuresimplifies the design of the isolated power supply andreduces the system cost. The integrated high-sidesupply voltage detection feature simplifies system level diagnostics. The ±4-V output of the ISO224allows lower-cost analog-to-digital converters (ADCs)to be used. The differential structure of..

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