Texas Instruments ADS8519 Handleiding
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Successive Approximation Register
Clock
Comparator
CS
CDAC
Buffer
REF
CAP
R1
IN
25.67kΩ
7kΩ
Internal
+4.096V Ref
4kΩ
Serial
Data
Out
and
Control
BUSY
DATACLK
DATA
2.87kΩ
7kΩ
R2
IN
R3
IN
EXT/INT
R/C
SB/BTC
PWRD
TAG
ADS8519
www.ti.com
SLAS462D–JUNE2007–REVISEDSEPTEMBER2010
16-Bit,250kSPS,Serial,CMOS,Sampling
ANALOG-TO-DIGITALCONVERTER
CheckforSamples:ADS8519
1
FEATURES
DESCRIPTION
23
•0Vto8.192V,±5V,and±10VInputRanges
TheADS8519isacomplete16-bitsampling
analog-to-digital(A/D)converterusingstate-of-the-art
•93dBSNRwith20kHzInput
CMOSstructures.Itcontainsacomplete16-bit,
•±1.5LSBMaxINL
capacitor-based,successiveapproximationregister
•±1LSBMaxDNL;16Bits,NoMissingCodes
(SAR)A/Dconverterwithsample-and-hold,
•SPI™-CompatibleSerialOutputwithreference,clock,andaserialdatainterface.Datacan
beoutputusingtheinternalclockorsynchronizedto
Daisy-Chain(TAG)Featureand3-StateBus
anexternaldataclock.TheADS8519alsoprovides
•5VAnalogSupply,1.65Vto5.25VI/OSupply
anoutputsynchronizationpulseforease-of-usewith
•PinoutSimilarto16-BitADS7809(Low-Speed)
standardDSPprocessors.
and12-BitADS7808andADS8508
TheADS8519isspecifiedata250kSPSsampling
•NoExternalPrecisionResistorsRequired
rateoverthefulltemperaturerange.Internalprecision
•UsesInternalorExternalReference
resistorsprovidevariousinputrangesincluding±10V,
±5V,and0Vto8.192V,whiletheinnovativedesign
•110mWTypPowerDissipationat250kSPS
allowsoperationfromasingle5Vsupplywithpower
•28-PinSSOPPackage
dissipationunder125mW.
•SimpleDSPInterface
TheADS8519isavailableina28-pinSSOP
package,andisfullyspecifiedforoperationoverthe
APPLICATIONS
industrial–40°Cto+85°Ctemperaturerange.
•IndustrialProcessControl
•DataAcquisitionSystems
•DigitalSignalProcessing
•MedicalEquipment
•Instrumentation
1
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexas
Instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
2SPIisatrademarkofMotorola,Inc.
3Allothertrademarksarethepropertyoftheirrespectiveowners.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.
Copyright©2007–2010,TexasInstrumentsIncorporated
ProductsconformtospecificationsperthetermsoftheTexas
Instrumentsstandardwarranty.Productionprocessingdoesnot
necessarilyincludetestingofallparameters.
ADS8519
SLAS462D–JUNE2007–REVISEDSEPTEMBER2010
www.ti.com
ThisintegratedcircuitcanbedamagedbyESD.TexasInstrumentsrecommendsthatallintegratedcircuitsbehandledwith
appropriateprecautions.Failuretoobserveproperhandlingandinstallationprocedurescancausedamage.
ESDdamagecanrangefromsubtleperformancedegradationtocompletedevicefailure.Precisionintegratedcircuitsmaybemore
susceptibletodamagebecauseverysmallparametricchangescouldcausethedevicenottomeetitspublishedspecifications.
PACKAGE/ORDERINGINFORMATION
(1)
MINIMUMNOMINIMUMSPECIFIED
INLMISSINGSINADTEMPERATUREPACKAGE-PACKAGEORDERINGTRANSPORT
PRODUCT(LSB)CODES(dB)RANGELEADDESIGNATORNUMBERMEDIA,QTY
ADS8519IBDBTube,50
ADS8519IB±1.516-Bit90–40°Cto+85°CSSOP-28DB
ADS8519IBDBRTapeandReel,2000
ADS8519IDBTube,50
ADS8519I±315-Bit87–40°Cto+85°CSSOP-28DB
ADS8519IDBRTapeandReel,2000
(1)Forthemostcurrentpackageandorderinginformation,seethePackageOptionAddendumattheendofthisdocument,orseetheTI
websiteatwww.ti.com.
ABSOLUTEMAXIMUMRATINGS
(1)(2)
Overoperatingfree-airtemperaturerange(unlessotherwisenoted).
UNIT
R1
IN
±25V
R2
IN
±25V
Analoginputs
R3
IN
±25V
REF+V
ANA
+0.3VtoAGND2–0.3V
DGND,AGND2±0.3V
GroundvoltagedifferencesV
ANA
6V
V
DIG
6V
Digitalinputs–0.3Vto+V
DIG
+0.3V
Internalpowerdissipation700mW
Maximumjunctiontemperature+165°C
Leadtemperature(soldering,10s)+300°C
(1)StressesabovethoselistedunderAbsoluteMaximumRatingsmaycausepermanentdamagetothedevice.Exposuretoabsolute
maximumconditionsforextendedperiodsmayaffectdevicereliability.
(2)Allvoltagevaluesarewithrespecttonetworkgroundterminal.
ELECTRICALCHARACTERISTICS
AtT
A
=–40°Cto+85°C,f
s
=250kSPS,andV
DIG
=V
ANA
=5V,usinginternalreference(unlessotherwisespecified).
ADS8519IADS8519IB
PARAMETERTESTCONDITIONSMINTYPMAXMINTYPMAXUNIT
Resolution1616Bits
ANALOGINPUT
Voltageranges
(1)
Impedance
(1)
Capacitance5050pF
THROUGHPUTSPEED
ConversioncycletimeAcquireandconvert44ms
Throughputrate250250kSPS
(1)±10V,±5V,0Vto8.192V,etc.(seeTable2)
2SubmitDocumentationFeedbackCopyright©2007–2010,TexasInstrumentsIncorporated
ProductFolderLink(s):ADS8519
ADS8519
www.ti.com
SLAS462D–JUNE2007–REVISEDSEPTEMBER2010
ELECTRICALCHARACTERISTICS(continued)
AtT
A
=–40°Cto+85°C,f
s
=250kSPS,andV
DIG
=V
ANA
=5V,usinginternalreference(unlessotherwisespecified).
ADS8519IADS8519IB
PARAMETERTESTCONDITIONSMINTYPMAXMINTYPMAXUNIT
DCACCURACY
INLIntegrallinearityerror–33–1.51.5LSB
(2)
DNLDifferentiallinearityerror–22–11LSB
Nomissingcodes1516Bits
Transitionnoise
(3)
0.670.67LSB
±10VrangeInternalreference–0.50.5–0.250.25
Full-scale
%FSR
error
(4)(5)
AllotherrangesInternalreference–0.5–0.050.5–0.5–0.050.5
Full-scaleerrordriftInternalreference±7±7ppm/°C
±10VrangeExternalreference–0.050.0030.05–0.050.0030.05
Full-scale
%FSR
error
(4)(5)
AllotherrangesExternalreference–0.50.5–0.50.5
Full-scaleerrordriftExternalreference±2±2ppm/°C
Bipolarzeroerror
(4)
–44–22mV
Bipolarzeroerrordrift±2±2ppm/°C
Unipolarzero
8.192V–20620–20620mV
error
(4)
Unipolarzeroerrordrift±0.4±0.4ppm/°C
Recoverytoratedaccuracyafter
1mFcapacitortoCAP11ms
powerdown
Powersupplysensitivity
+4.75V<V
D
<+5.25V–88–88LSB
(V
DIG
=V
ANA
=V
D
)
ACACCURACY
SFDRSpurious-freedynamicrangef
I
=20kHz9510097100dB
(6)
THDTotalharmonicdistortionf
I
=20kHz–96–94–98–96dB
f
I
=20kHz87919092dB
SINADSignal-to-(noise+distortion)
–60dBInput3032dB
SNRSignal-to-noiseratiof
I
=20kHz88929193dB
Full-powerbandwidth
(7)
500500kHz
SAMPLINGDYNAMICS
Aperturedelay55ns
TransientresponseFSstep22ms
Overvoltagerecovery
(8)
150150ns
REFERENCE
InternalreferencevoltageNoload4.0764.0964.1164.0764.0964.116V
Internalreferencesourcecurrent
11mA
(mustuseexternalbuffer)
Internalreferencedrift88ppm/°C
Externalreferencevoltagerange
3.94.0964.23.94.0964.2V
forspecifiedlinearity
ExternalreferencecurrentdrainExternal4.096Vref.100100mA
(2)LSBmeansLeastSignificantBit.Forthe±10Vinputrange,oneLSBis305mV.
(3)Typicalrmsnoiseatworst-casetransitionsandtemperatures.
(4)AsmeasuredwithcircuitshowninFigure29andFigure30.
(5)Forbipolarinputranges,full-scaleerroristheworstcaseof–Full-Scaleor+Full-Scaleuncalibrateddeviationfromidealfirstandlast
codetransitions,dividedbythetransitionvoltage(notdividedbythefull-scalerange)andincludestheeffectofoffseterror.Forunipolar
inputranges,full-scaleerroristhedeviationofthelastcodetransitiondividedbythetransitionvoltage.Italsoincludestheeffectof
offseterror.
(6)AllspecificationsindBarereferredtoafull-scale±10Vinput.
(7)Full-powerbandwidthisdefinedasthefull-scaleinputfrequencyatwhichsignal-to-(noise+distortion)degradesto60dB.
(8)Recoverstospecifiedperformanceafter2xFSinputovervoltage.
Copyright©2007–2010,TexasInstrumentsIncorporatedSubmitDocumentationFeedback3
ProductFolderLink(s):ADS8519
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | ADS8519 |
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