3V/5V DACs Support Intelligent Current Loop

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Abstract:Thisapplicationnoteexplains4–20mAcurrentloopsandintelligenttransmittersandexplainstheirneedforhigh-resolutionlow-powerDACs.Maxim>AppNotes>A/DandD/ACONVERSION/SAMPLINGCIRCUITSAMPLIFIERANDCOMPARATORCIRCUITSSIGNALGENERATIONCIRCUITSKeywords:4-20mA,currentloop,currentloops,DAC,ADC,currentDAC,isolation,2-wire,signalconditioning,Dec29,2000lowpower,D/A,industrialcontrol,EMI,transducers,currenttransmission,transmitterAPPLICATIONNOTE7223V/5VDACsSupportIntelligentCurrentLoopAbstract:Thisapplicationnoteexplains4-20mAcurrentloopsandintelligenttransmittersandexplainstheirneedforhigh-resolutionlow-powerDACs.Anoptimumpower-supplychipisnottheonlycriticalchoicetobemadeindesigningamixed3V/5Vmicroprocessor-controlledsystem.Becausemoreandmoresystemsrequirelow-powercomponentscapableoflow-voltagestartup,state-of-the-artA/

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