Texas Instruments ADS1601 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

ADS1601

ADS1601

www.ti.com

SBAS322D–DECEMBER2004–REVISEDOCTOBER2011

16-Bit,1.25MSPSAnalog-to-DigitalConverter

CheckforSamples:ADS1601

1

FEATURES

DESCRIPTION

TheADS1601isahigh-speed,high-precision,

2

•HighSpeed:

delta-sigmaanalog-to-digitalconverter(ADC)

–DataRate:1.25MSPS

manufacturedonanadvancedCMOSprocess.The

–Bandwidth:615kHz

ADS1601oversamplingtopologyreducesclockjitter

sensitivityduringthesamplingofhigh-frequency,

•OutstandingPerformance:

largeamplitudesignalsbyafactoroffouroverthat

–SNR:92dBatf

IN

=100kHz,–1dBFS

achievedbyNyquist-rateADCs.Consequently,

–THD:–103dBatf

IN

=100kHz,–6dBFS

signal-to-noiseratio(SNR)isparticularlyimproved.

Totalharmonicdistortion(THD)is–103dB,andthe

–SFDR:105dBatf

IN

=100kHz,–6dBFS

spurious-freedynamicrange(SFDR)is105dB

•Ease-of-Use:

Optimizedforpowerandperformance,theADS1601

–High-Speed3-WireSerialInterface

dissipatesonly330mWwhileprovidingafull-scale

–DirectlyConnectstoTMS320DSPs

differentialinputrangeof±0.94V

REF

.Havingsucha

–On-ChipDigitalFilterSimplifiesAnti-Alias

wideinputrangemakesout-of-rangesignals

Requirements

uncommon.TheOTRpinindicatesifananaloginput

out-of-rangeconditiondoesoccur.Thedifferential

–SimplePin-DrivenControl—NoOn-Chip

inputsignalismeasuredagainstthedifferential

RegisterstoProgram

reference,whichcanbegeneratedinternallyonthe

–SelectableOn-ChipVoltageReference

ADS1601orsuppliedexternally.

–SimultaneousSamplingwithMultiple

TheADS1601usesaninherentlystableadvanced

ADS1601s

modulatorwithanon-chipdecimationfilter.Thefilter

•LowPower:

stopbandextendsto19.3MHz,whichgreatly

simplifiestheanti-aliasingcircuitry.Themodulator

–330mWat1.25MSPS

samplestheinputsignalupto20MSPS,depending

–145mWat625kSPS

onf

CLK

,whilethe16xdecimationfilterusesaseries

–Power-DownMode

offourhalf-bandFIRfilterstagestoprovide75dBof

stopbandattenuationand0.001dBofpassband

APPLICATIONS

ripple.

•Sonar

Outputdataisprovidedoverasimple3-wireserial

interfaceatratesupto1.25MSPS,witha–3dB

•VibrationAnalysis

bandwidthof615kHz.Theoutputdataorits

•DataAcquisition

complementaryformatdirectlyconnectstoDSPs

suchasTI’sTMS320family,FPGAs,orASICs.A

dedicatedsynchronizationpinenablessimultaneous

samplingwithmultipleADS1601sinmulti-channel

systems.Powerdissipationissetbyanexternal

resistorthatallowsareductionindissipationwhen

operatingatslowerspeeds.AlloftheADS1601

featuresarecontrolledbydedicatedI/Opins,which

simplifyoperationbyeliminatingtheneedforon-chip

registers.

Thehighperforming,easy-to-useADS1601is

especiallysuitablefordemandingmeasurement

applicationsinsonar,vibrationanalysis,anddata

acquisition.TheADS1601isofferedinasmall,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