ADCs for Simultaneous Sampling

Abstract:Multichannelanalog-to-digitalconverters(ADCs)typicallyconverteachinputchannelsequentiallyusinganinputmultiplexer.Certainapplicationsrequiresimultaneousconversions,especiallywhenphaseinformationexistsbetweendifferentchannels.Forexample,wirelessapplicationsrequireIandQchannelstobeconvertedatthesameinstance,motorcontrolandpowermonitoringrequiresvoltageandcurrentmeasurementsandthephaseanglebetweenthem.Inthepast,simultaneoussamplingmeantthedesignerhadtousemultipleADCs,andperformparallelconversionsoneachchannel.SimultaneoussamplingADCsnowperformthetaskusingmultipleT/Htosampletheinputsatthesameinstant,thenperformtheconversionforeachchannel.Maxim>AppNotes>A/DandD/ACONVERSION/SAMPLINGCIRCUITSKeywords:simultaneoussamplingADC,analogtodigitalconverters,ADCs,analogdigital,MAX126,MAX126,Oct01,2000MAX115,MAX116,T/H,MUX,simultaneoussampling,motorcontrol,I/Qsampling,wireless,I/Q,Coriolis,Mass-flow,powerfaultAPPLICATIONNOTE290ADCsforSimultaneousSamplingAbstract:Multichannelanalog-to-digitalconverters(ADCs)typicallyconverteachinputchannelsequentiallyusinganinputmultiplexer.Certainapplicationsrequiresimultaneousconversions,especiallywhenphaseinformationexistsbetweendifferentchannels.Forexample,wirelessapplicationsrequireIandQchannelstobeconvertedatthesameinstance,motorcontrolandpowermonitoringrequiresvoltageandcurrentmeasurementsan