TheAD7277isa10-bit,highspeed,lowpower,successive-approximationADC.Thepartoperatesfromasingle2.35Vto3.6Vpowersupplyandfeaturesthroughputratesupto3MSPS.Thepartcontainsalow-noise,widebandwidthtrack/holdamplifierwhichcanhandleinputfrequenciesinexcessof30MHz.
TheconversionprocessanddataacquisitionarecontrolledusingCSandtheserialclock,allowingthedevicestointerfacewithmicroprocessorsorDSPs.TheinputsignalissampledonthefallingedgeofCSandtheconversionisalsoinitiatedatthispoint.Therearenopipelinedelaysassociatedwiththepart.
TheAD7277usesadvanceddesigntechniquestoachieveverylowpowerdissipationathighthroughputrates.
ThereferenceforthepartistakeninternallyfromVDD.ThisallowsthewidestdynamicinputrangetotheADC.Thustheanaloginputrangeforthepartis0toVDD.TheconversionrateisdeterminedbytheSCLK