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1、LCD/LED显示A/D转换器中英文资料外文翻译文献Digit,LCD/LEDDisplay,A/DConvertersAbstract:TheIntersilICL7106andICL7107arehighperformance,lowpower,digitA/Dconverters.Includedaresevensegmentdecoders,displaydrivers,areference,andaclock.TheICL7106isdesignedtointerfacewithaliquidcrystaldisplay(LC
2、D)andincludesamultiplexedbackplanedrive;theICL7107willdirectlydriveaninstrumentsizelightemittingdiode(LED)display.TheICL7106andICL7107bringtogetheracombinationofhighaccuracy,versatility,andtrueeconomy.Itfeaturesautozerotolessthan10μV,zerodriftoflessthan1μV/℃,inputbiascur
3、rentof10pA(Max),androllovererroroflessthanonecount.Truedifferentialinputsandreferenceareusefulinallsystems,butgivethedesigneranuncommonadvantagewhenmeasuringloadcells,straingaugesandotherbridgetypetransducers.Finally,thetrueeconomyofsinglepowersupplyoperation(ICL7106),en
4、ablesahighperformancepanelmetertobebuiltwiththeadditionofonly10passivecomponentsandadisplay.Keyword:DigitLCD/LEDDisplayA/DConverters1Features(1)GuaranteedZeroReadingfor0VInputonAllScales(2)1pATypicalInputCurrent(3)TrueDifferentialInputandReference,DirectDisplayDrive-LCDI
5、CL7106,LEDLCL7107(4)LowNoise-LessThan15μVP-P(5)OnChipClockandReference(6)LowPowerDissipation-TypicallyLessThan10mW第16页共16页(7)NoAdditionalActiveCircuitsRequired2DetailedDescription2.1AnalogSectionFigure1showstheAnalogSectionfortheICL7106andICL7107.Eachmeasurementcycleisdi
6、videdintothreephases.Theyare(1)auto-zero(A-Z),(2)signalintegrate(INT)and(3)de-integrate(DE).FIGURE1ANALOGSECTIONOFICL7106ANDICL71072.2Auto-ZeroPhaseDuringauto-zerothreethingshappen.First,inputhighandlowaredisconnectedfromthepinsandinternallyshortedtoanalogCOMMON.Second,t
7、hereferencecapacitorischargedtothereferencevoltage.Third,afeedbackloopisclosedaroundthesystemtochargetheauto-zerocapacitorCAZtocompensateforoffsetvoltagesinthebufferamplifier,integrator,andcomparator.Sincethecomparatorisincludedintheloop,theAZaccuracyislimitedonlybytheno
8、iseofthesystem.Inanycase,theoffsetreferredtotheinputislessthan10μV.2.3SignalIntegratePhaseDuringsignali
