Texas Instruments ADS1231 Handleiding

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24-Bit

ADCDS

VREFPVREFN

CAPDVDD

GND

AINP

AINN

SCLK

SPEED

DRDY/DOUT

PDWN

AVDD

Internal

Oscillator

G=128

SW

CAP

CLKIN

EMI

Filter

ADS1231

www.ti.com

SBAS414D–JULY2009–REVISEDOCTOBER2013

24-BitAnalog-to-DigitalConverter

forBridgeSensors

CheckforSamples:ADS1231

1

FEATURES

DESCRIPTION

TheADS1231isaprecision,24-bitanalog-to-digital

2

•CompleteFront-EndforBridgeSensors

converter(ADC).Withanonboardlow-noise

•InternalAmplifier,Gainof128

amplifier,onboardoscillator,precisionthird-order24-

•InternalOscillator

bitdelta-sigma(ΔΣ)modulator,andbridgepower

switch,theADS1231providesacompletefront-end

•Low-SidePowerSwitchforBridgeSensor

solutionforbridgesensorapplicationsincluding

•LowNoise:35nVrms

weighscales,straingauges,andloadcells.

•SelectableDataRates:10SPSor80SPS

Thelow-noiseamplifierhasagainof128,supporting

•Simultaneous50Hzand60HzRejectionat

afull-scaledifferentialinputof±19.5mV.TheΔΣADC

10SPS

has24-bitresolutionandiscomprisedofathird-order

•InputEMIFilter

modulatorandfourth-orderdigitalfilter.Twodata

ratesaresupported:10SPS(withboth50Hzand

•ExternalVoltageReferenceupto5Vfor

60Hzrejection)and80SPS.TheADS1231canbe

RatiometricMeasurements

putinalow-powerstandbymodeorshutoff

•Simple,Pin-DrivenControl

completelyinpower-downmode.

•Two-WireSerialDigitalInterface

TheADS1231iscontrolledbydedicatedpins;there

•SupplyRange:3Vto5.3V

arenodigitalregisterstoprogram.Dataareoutput

overaneasily-isolatedserialinterfacethatconnects

•Package:SOIC-16

directlytotheMSP430andothermicrocontrollers.

•TemperatureRange:–40°Cto+85°C

TheADS1231isavailableinanSO-16packageand

APPLICATIONSisspecifiedfrom–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