两个IC 4-20mA信号转换成0-5V输出

述了一个简单的电路，转换成4-20mA信号到0V到5V的模拟电压转换到数字与模拟到数字转换器（ADC）的理想。从传感器4毫安水平产生0V输出的20mA的水平产生5V输出。电流检测放大器产生这种模拟0V至5V输出。此外，该电路提供了一个比较，可以用来检测零电流条件下的输出。Maxim>AppNotes>A/DandD/AConversion/SamplingCircuitsAmplifierandComparatorCircuitsInterfaceCircuitsSensorsKeywords:4-20mAtransducers,4-20mAtranslator,4to20mAconverter,A/D,ADC,atod,analogdigital,analogtodigitalconverters,Nov27,2001convertorAPPLICATIONNOTE823TwoICsConvert4-20mASignalto0-5VOutputAbstract:Thisdesignideadescribesasimplecircuitthatconvertsa4-20mAsignaltoa0Vto5Vanalogvoltageidealforconversiontodigitalwithananalog-to-digitalconverter(ADC).The4mAlevelfromthetransducerproducesa0Voutputandthe20mAlevelproducesa5Voutput.Acurrentsenseamplifiergeneratesthisanalog0Vto5Voutput.Inaddition,thecircuitprovidesacomparatoroutputthatcanbeused