TI ISO2245 kVRMS增强隔离放大器解决方案

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 the outputsupports high immunity to noise.
The ISO224 is fully specified over the extendedindustrial temperature range of –40℃ to +125℃ andis available in a wide-body 8-pin SOIC (DWV)package.
ISO224主要特性:
• Offered in High-Grade (ISO224B) and Low-Grade(ISO224A) Versions
• ±12-V Input Voltage Range Optimized for IsolatedVoltage Measurement in Industrial Applications
• Overvoltage Input Clamp With 9-kV ESD
• ±4-V Differential Output Voltage Range WithCommon-Mode at VDD2/2
• Low DC-Error Operation (ISO224B):
– Input Offset: ±5 mV at 25℃, ±42 μV/¡ãC max
– Gain Error: ±0.3% at 25℃,...