Texas Instruments ADS1602 Handleiding

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FSO

ReferenceandBiasCircuits

Serial

Interface

LinearPhase

FIRDigitalFilter

DS

Modulator

VREFPVREFNRBIASVMIDVCAPAVDDDVDDIOVDD

DGND

AGND

AINP

AINN

FSO

SCLK

DOUT

SCLK

SYNC

CLK

DOUT

OTR

PD

REFEN

ADS1602

ADS1602

www.ti.com

SBAS341E–DECEMBER2004–REVISEDOCTOBER2011

16-Bit,2.5MSPSAnalog-to-DigitalConverter

CheckforSamples:ADS1602

1

FEATURES

DESCRIPTION

TheADS1602isahigh-speed,high-precision,

2

•HighSpeed:

delta-sigma(ΔΣ)analog-to-digitalconverter(ADC)

–DataRate:2.5MSPS

manufacturedonanadvancedCMOSprocess.The

–Bandwidth:1.23MHz

ADS1602oversamplingtopologyreducesclockjitter

sensitivityduringthesamplingofhigh-frequency,

•OutstandingPerformance:

largeamplitudesignalsbyafactoroffouroverthat

–SNR:91dBatf

IN

=100kHz,–1dBFS

achievedbyNyquist-rateADCs.Consequently,

–THD:–101dBatf

IN

=100kHz,–6dBFS

signal-to-noiseratio(SNR)isparticularlyimproved.

Totalharmonicdistortion(THD)is–101dB,andthe

–SFDR:103dBatf

IN

=100kHz,–6dBFS

spurious-freedynamicrange(SFDR)is103dB.

•Ease-of-Use:

Optimizedforpowerandperformance,theADS1602

–High-Speed3-WireSerialInterface

dissipatesonly530mWwhileprovidingafull-scale

–DirectlyConnectstoTMS320DSPs

differentialinputrangeof±3V.Havingsuchawide

–On-ChipDigitalFilterSimplifiesAntialias

inputrangemakesout-of-rangesignalsunlikely.The

Requirements

OTRpinindicatesifananaloginputout-of-range

conditiondoesoccur.Thedifferentialinputsignalis

–SimplePin-DrivenControl—NoOn-Chip

measuredagainstthedifferentialreference,which

RegisterstoProgram

canbegeneratedinternallyorsuppliedexternallyon

–SelectableOn-ChipVoltageReference

theADS1602.

–SimultaneousSamplingwithMultiple

TheADS1602usesaninherentlystableadvanced

ADS1602s

modulatorwithanon-chipdecimationfilter.Thefilter

•LowPower:

stopbandextendsto38.6MHz,whichgreatly

simplifiestheantialiasingcircuitry.Themodulator

–530mWat2.5MSPS

samplestheinputsignalupto40MSPS,depending

–Power-DownMode

onf

CLK

,whilethe16xdecimationfilterusesaseries

offourhalf-bandFIRfilterstagestoprovide75dBof

APPLICATIONS

stopbandattenuationand0.001dBofpassband

ripple.

•Sonar

•VibrationAnalysis

Outputdataisprovidedoverasimple3-wireserial

interfaceatratesupto2.5MSPS,witha–3dB

•DataAcquisition

bandwidthof1.23MHz.Theoutputdataorits

complementaryformatdirectlyconnectstoDSPs

suchasTI’sTMS320family,FPGAs,orASICs.A

dedicatedsynchronizationpinenablessimultaneous

samplingwithmultipleADS1602sinmulti-channel

systems.Powerdissipationissetbyanexternal

resistorthatallowsareductionindissipationwhen

operatingatslowerspeeds.AlloftheADS1602

featuresarecontrolledbydedicatedI/Opins,which

simplifyoperationbyeliminatingtheneedforon-chip

registers.

Thehighperforming,easy-to-useADS1602is

especiallysuitablefordemandingmeasurement

applicationsinsonar,vibrationanalysis,anddata

acquisition.TheADS1602isofferedinasmall,7mm

×7mmTQFP-48packageandisspecified

from–40°Cto+85°C.

1

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexas

Instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2004–2011,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Product specificaties