TheAD1934isahighperformance,single-chipthatprovideseightdigital-to-analogconverters(DACs)withsingle-endedoutputusingtheAnalogDevices,Inc.patentedmultibitsigma-delta(Σ-Δ)architecture.AnSPIportisincluded,allowingamicrocontrollertoadjustvolumeandmanyotherparameters.TheAD1934operatesfrom3.3Vdigitalandanalogsupplies.TheAD1934isavailableina48-lead(single-endedoutput)LQFP.OthermembersofthisfamilyincludeadifferentialDACoutputandI2C®controlportversion.
TheAD1934isdesignedforlowEMI.Thisconsiderationisapparentinboththesystemandcircuitdesignarchitectures.Byusingtheon-boardPLLtoderivethemasterclockfromtheLRclockorfromanexternalcrystal,theAD1934eliminatestheneedforaseparatehighfrequencymasterclockandcanalsobeusedwithasuppressedbitclock.Thedigital-to-analogconvertersaredesignedusingthelatestADIcontinuoustimearchitecturestofurtherminimizeEMI.Byusing3.3Vsupplies,powerconsumptionisminimized,furtherreducingemissions.