使用TC500A和TC520实现15公斤秤

A15kgweighingscalewasdesignedusingMicrochip'sTC500A

AnalogProcessorandtheTC52016-bitController.Thescaleis

requiredtoresolvedownto1/8gramandcorrecttowithin61/2

gram.Thisprojecttakesintoaccountallaspectsofafunctionalscale:

•DynamicRange

•StrainGaugeCompensation

•Zeroing

•Oversampling

•UnitsConversion(kilogramstopounds)

TheTC500Aisananalogprocessordevicewhichperformsadual-

slopeanalog-to-digitalconversionfunction.Allofthecountingand

timingfortheconversionmustbecontrolledbyanexternalsource.

Innearlyallapplications,thiscontrolsourceisamicroprocessor.

Themicroprocessorisprogrammedtomonitorthestatusandto

controlthetimingoftheTC500A.Itmustalsobeprogrammedto

counttheconversionresults.AN78015-KilogramScaleUsingtheTC500AandtheTC520TheTC500AhasnoagendaofitsownsoitcanbeusedtogenerateAuthor:TedDabney,slow,highresolutionconversionsorfast,lowresolutionconver-MicrochipTechnology,Inc.sions.Thetrade-offforaccuracyisabout1000countspermillisec-