Texas Instruments ADS1230 Handleiding

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DSADC

REFPREFNCAPDVDD

DGND

GAIN

AINP

AINN

SCLK

SPEED

DRDY/DOUT

PDWN

AVDD

CAP

Internal

Oscillator

CLKIN

Gain=64or128

PGA

AGND

ADS1230

www.ti.com

SBAS366B–OCTOBER2006–REVISEDSEPTEMBER2012

20-BitAnalog-to-DigitalConverter

ForBridgeSensors

CheckforSamples:ADS1230

1

FEATURES

DESCRIPTION

TheADS1230isaprecision20-bitanalog-to-digital

2

•CompleteFront-EndforBridgeSensor

converter(ADC).Withanonboardlow-noise

•OnboardPGAwithGainof64or128

programmablegainamplifier(PGA),onboard

•OnboardOscillator

oscillator,andprecision20-bitdelta-sigmaADC,the

ADS1230providesacompletefront-endsolutionfor

•RMSNoise:

bridgesensorapplicationsincludingweighscales,

40nVat10SPS(G=128)

straingauges,andpressuresensors.

88nVat80SPS(G=128)

Thelow-noisePGAhasagainof64or128,

•18-BitNoise-FreeResolution

supportingafull-scaledifferentialinputof±39mVor

•Selectable10SPSor80SPSDataRates

±19.5mV,respectively.Thedelta-sigmaADChas20-

•Simultaneous50Hzand60HzRejectionat

biteffectiveresolutionandiscomprisedofa3rd-

10SPS

ordermodulatorand4th-orderdigitalfilter.Twodata

ratesaresupported:10SPS(withboth50Hzand

•ExternalVoltageReferenceupto5Vfor

60Hzrejection)and80SPS.TheADS1230canbe

RatiometricMeasurements

clockedbytheinternaloscillatororanexternalclock

•Simple,Pin-DrivenControl

source.Offsetcalibrationisperformedon-demand,

•Two-WireSerialDigitalInterface

andtheADS1230canbeputinalow-powerstandby

modeorshutoffcompletelyinpower-downmode.

•Tiny16-pinTSSOPPackage

•SupplyRange:2.7Vto5.3V

AllofthefeaturesoftheADS1230arecontrolledby

dedicatedpins;therearenodigitalregistersto

•–40°Cto+85°CTemperatureRange

program.Dataareoutputoveraneasily-isolated

serialinterfacethatconnectsdirectlytotheMSP430

APPLICATIONS

andothermicrocontrollers.

•WeighScales

TheADS1230isavailableinaTSSOP-16package

•StrainGauges

andisspecifiedfrom–40°Cto+85°C.

•PressureSensors

•IndustrialProcessControl

1

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2006–2012,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Product specificaties