Dual, Voltage-Output DAC Consumes Miniscule Power

Abstract:Thisdesignnoteshowsacircuitthatmodifiesadual,voltage-outputdigital-to-analogconverter(DAC)tosavepoweranddrawlessthan20µAfroma5Vsupply.Thiscircuitisusefulforprogrammablevoltagegenerationinsloworstaticapplications,suchasthenullingofoffsetsinamicropowerinstrument.Maxim>AppNotes>A/DandD/AConversion/SamplingCircuitsKeywords:digital-to-analogconverter,DAC,voltageswitching,voltage-outputDACJan21,2002APPLICATIONNOTE111Dual,Voltage-OutputDACConsumesMinisculePowerAbstract:Thisdesignnoteshowsacircuitthatmodifiesadual,voltage-outputdigital-to-analogconverter(DAC)tosavepoweranddrawlessthan20Afroma5Vsupply.Thiscircuitisusefulforprogrammablevoltagegenerationinsloworstaticapplications,suchasthenullingofoffsetsinamicropowerinstrument.AsimilarversionofthisarticleappearedinElectronicDesignmagazine.Thedual,voltage-outputDACsshowninthefigurebelowemployacombinationofpower-conservingtrickstodraw