TheSSM2142isanintegrateddifferential-outputbufferamplifierthatconvertsasingle-endedinputsignaltoabalancedoutputsignalpairwithhighoutputdrive.Byutilizinglownoisethermallymatchedthinfilmresistorsandhighslewrateamplifiers,theSSM2142helpsmaintainthesonicqualityofaudiosystemsbyeliminatingpowerlinehum,RFinterference,voltagedrops,andotherexternallygeneratednoisecommonlyencounteredwithlongaudiocableruns.Excellentrejectionofcommon-modenoiseandoffseterrorsisachievedbylasertrimmingoftheonboardresistors,assuringhighgainaccuracy.ThecarefullydesignedoutputstageoftheSSM2142iscapableofdrivingdifficultloads,yieldinglowdistortionperformancedespiteextremelylongcablesorloadsaslowas600Ohm,andisstableoverawiderangeofoperatingconditions.
Basedonacross-coupled,electronicallybalancedtopology,theSSM2142mimicstheperformanceoffullybalancedtransformer-basedsolutionsforlinedriving.However,theSSM2142maintainslowerdistortionandoccupiesmuchlessboardspacethantransformerswhileachievingcomparablecommon-moderejectionperformancewithreducedpartscount.
TheSSM2142intandemwiththeSSM2141differentialreceiverestablishesacomplete,reliablesolutionfordrivingandreceivingaudiosignalsoverlongcables.TheSSM2141featuresanInputCommon-ModeRejectionRatioof100dBat60Hz.Specificationsdemonstratingtheperformanceofthistypicalsystemareincludedinthedatasheet.