Texas Instruments ADS1131 Handleiding

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DSADC

VREFPVREFN

CAPDVDD

GND

AINP

AINN

SCLK

SPEED

DRDY/DOUT

PDWN

AVDD

Internal

Oscillator

G=64

SW

CAP

ADS1131

www.ti.com

SBAS449C–JULY2009–REVISEDOCTOBER2013

18-BitAnalog-to-DigitalConverter

forBridgeSensors

CheckforSamples:ADS1131

1

FEATURES

DESCRIPTION

TheADS1131isaprecision,18-bitanalog-to-digital

2

•CompleteFront-EndforBridgeSensors

converter(ADC).Withanonboard,low-noise

•AvailableinanSOPackage

amplifier,onboardoscillator,precision18-bitdelta-

•InternalAmplifier,Gainof64

sigma(ΔΣ)ADC,andbridgepowerswitch,the

ADS1131providesacompletefront-endsolutionfor

•InternalOscillator

bridgesensorapplicationsincludingweighscales,

•Low-SidePowerSwitchforBridgeSensor

straingauges,andloadcells.

•18-BitNoise-FreeResolution

Thelow-noiseamplifierhasagainof64,supportinga

•Selectable10SPSor80SPSDataRates

full-scaledifferentialinputof±39mV.TheΔΣADC

•Simultaneous50Hzand60HzRejectionat

has18-biteffectiveresolutionandiscomprisedofa

10SPS

third-ordermodulatorandfourth-orderdigitalfilter.

Twodataratesaresupported:10SPS(withboth

•ExternalVoltageReferenceupto5Vfor

50Hzand60Hzrejection)and80SPS.TheADS1131

RatiometricMeasurements

canbeputintoalow-powerstandbymodeorshutoff

•Simple,Pin-DrivenControl

completelyinpower-downmode.

•Two-WireSerialDigitalInterface

TheADS1131iscontrolledbydedicatedpins;there

•SupplyRange:3Vto5.3V

arenodigitalregisterstoprogram.Dataareoutput

overaneasily-isolatedserialinterfacethatconnects

•–40°Cto+85°CTemperatureRange

directlytotheMSP430andothermicrocontrollers.

APPLICATIONS

TheADS1131isavailableinanSO-16packageand

isspecifiedfrom–40°Cto+85°C.

•WeighScales

•StrainGauges

•LoadCells

•IndustrialProcessControl

1

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2009–2013,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Product specificaties