标签: tc500a

Today,designengineersrelymoreonmicroprocessorsandmicrocontrollerstosupporttheirapplications.Compatibleanalog-to-digital(A/D)anddigital-to-analog(A/D)convertershavegreatlyincreasedtheflexibilityofinterfaceandcontrolcircuits.Mostoftheavailableconverters,however,are“independent”andnotsubjecttoreconfigurationundersoftwarecontrol—nomatterhowsmartyourprocessor.Forexample,ifyourtaskinvolves8-bitconversionsofbatteryvoltageand16-bitconversionsofoutputvoltage,youarerequiredtousetwodifferentconverters—ortake16bitsoftimetomeasureyourbattery.AN789IntegratingConverterAnalogProcessor……

A15kgweighingscalewasdesignedusingMicrochip'sTC500AAnalogProcessorandtheTC52016-bitController.Thescaleisrequiredtoresolvedownto1/8gramandcorrecttowithin61/2gram.Thisprojecttakesintoaccountallaspectsofafunctionalscale:•DynamicRange•StrainGaugeCompensation•Zeroing•Oversampling•UnitsConversion(kilogramstopounds)TheTC500Aisananalogprocessordevicewhichperformsadual-slopeanalog-to-digitalconversionfunction.Allofthecountingandtimingfortheconversionmustbecontrolledbyanexternalsource.Innearlyallapplications,thiscontrolsourceisamicroprocessor.ThemicroprocessorisprogrammedtomonitorthestatusandtocontrolthetimingoftheTC500A.Itmustalsobeprogrammedtocounttheconversionresults.AN78015-KilogramScaleUsingtheTC500AandtheTC520TheTC500AhasnoagendaofitsownsoitcanbeusedtogenerateAuthor:TedDabney,slow,highresolutionconversionsorfast,lowresolutionconver-MicrochipTechnology,Inc.sions.Thetrade-offforaccuracyisabout1000countspermillisec-……