DAC and Op Amp Generate Variable Negative Control Voltage

Abstract:Thisdesignideadescribesasimplecircuittogenerateaprogrammablenegativecontrolvoltage.Ittakestheoutputofasinglesupplydigital-to-analogconverter(DAC)andproducesavariablenegativevoltage.TheDACoutputfrom0Vto+2.5Visconvertedto0Vto-5Vattheoutput.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