DAC和运算放大器产生可变负控制电压

摘要：这样的设计理念，描述了一个简单的电路产生负可编程控制电压。它采用单电源数字-模拟转换器（DAC）的输出，并产生一个可变的负电压。DAC的输出从0V至+2.5V转换为0V至5V输出。Maxim>AppNotes>A/DandD/ACONVERSION/SAMPLINGCIRCUITSAMPLIFIERANDCOMPARATORCIRCUITSSIGNALGENERATIONCIRCUITSKeywords:DACs,singlesupplyDAC,variablenegativecontrolvoltage,programmablenegativevoltage,May24,2002positivetonegativevoltagetranslator,digitalanalogconverter,digitaltoanalogconvertersAPPLICATIONNOTE1074DACandOpAmpGenerateVariableNegativeControlVoltageAbstract:Thisdesignideadescribesasimplecircuittogenerateaprogrammablenegativecontrolvoltage.Ittakestheoutputofasinglesupplydigital-to-analogconverter(DAC)andproducesavariablenegativevoltage.TheDACoutputfrom0Vto+2.5Visconvertedto0Vto-5Vattheoutput.Earlydigital-to-analogconverters(DACs)weredesignedwithstandardR-2Rladders,a