TheAD7476A/AD7477A/AD7478Aare12-bit,10-bit,and8-bithighspeed,lowpower,successive-approximationanalog-to-digitalconverters(ADCs),respectively.Thepartsoperatefromasingle2.35Vto5.25Vpowersupplyandfeaturethroughputratesupto1MSPS.Thepartscontainalownoise,widebandwidthtrack-and-holdamplifierthatcanhandleinputfrequenciesinexcessof13MHz.TheconversionprocessanddataacquisitionarecontrolledusingCSandtheserialclock,allowingthedevicestointerfacewithmicroprocessorsorDSPs.TheinputsignalissampledonthefallingedgeofCS,andtheconversionisalsoinitiatedatthispoint.Therearenopipelinedelaysassociatedwiththeparts.TheAD7476A/AD7477A/AD7478Auseadvanceddesigntechniquestoachievelowpowerdissipationathighthroughputrates.ThereferenceforthepartistakeninternallyfromVDDtoallowthewidestdynamicinputrangetotheADC.Thus,theanaloginputrangeforthepartis0VtoVDD.TheconversionrateisdeterminedbytheSCLK.