Texas Instruments ADS8471 Handleiding
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1
FEATURES
APPLICATIONS
DESCRIPTION
CDAC
_
+
Output
Latches
and
3-State
Drivers
BYTE
16-/8-Bit
Parallel DATA
Output Bus
SAR
Conversion
and
Control Logic
Comparator
Clock
+IN
−IN
REFIN
CONVST
BUSY
CS
RD
4.096-V
Internal
Reference
REFOUT
ADS8471
SLAS517–DECEMBER2007
16-BIT,1-MSPS,PSEUDO-BIPOLAR,UNIPOLARINPUT,MICROPOWERSAMPLING
ANALOG-TO-DIGITALCONVERTERWITHPARALLELINTERFACEANDREFERENCE
•48-Pin7x7QFNPackage
•0to1MSPSSamplingRate
•±0.7LSBTyp,±1LSBMaxINL
•MedicalInstruments
•±0.4LSBTyp,±0.75LSBMaxDNL
•OpticalNetworking
•16-BitNMCEnsuredOverTemperature
•TransducerInterface
•±0.1mVOffsetError
•HighAccuracyDataAcquisitionSystems
•±0.15ppm/°COffsetErrorDrift
•Magnetometers
•±0.015%FSRGainError
•±0.7ppm/°CGainErrorDrift
•93dBSNR,-110dBTHD,112dBSFDR
TheADS8471isan16-bit,1-MSPSA/Dconverter
withaninternal4.096-Vreferenceanda
•ZeroLatency
pseudo-bipolar,unipolarinput.Thedeviceincludesa
•LowPower:220mWat1MSPS
16-bitcapacitor-basedSARA/Dconverterwith
•UnipolarInputRange:0VtoV
ref
inherentsampleandhold.TheADS8471offersafull
16-bitinterfaceoran8-bitbusoptionusingtworead
•OnboardReference
cycles.
•OnboardReferenceBuffer
TheADS8471isavailableina48-lead7x7QFN
•High-SpeedParallelInterface
packageandischaracterizedovertheindustrial
•WideDigitalSupply2.7V~5.25V
–40°Cto85°Ctemperaturerange.
•8-/16-BitBusTransfer
HIGH-SPEEDSARCONVERTERFAMILY
(1)
TYPE/SPEED500kHz580kHz750kHz1MHz1.25MHz2MHz3MHz4MHz
ADS8383ADS8381
18-BitPseudo-Diff
ADS8380(S)
18-BitPseudo-Bipolar,FullyDiffADS8382(S)ADS8482ADS8484
ADS8327(S)ADS8370(S)ADS8371ADS8471ADS8401ADS8411
16-BitPseudo-Diff
ADS8328(S)ADS8329/30(S)ADS8405ADS8410(S)
ADS8372(S)ADS8472ADS8402ADS8412ADS8422
16-BitPseudo-Bipolar,FullyDiff
ADS8406ADS8413(S)
14-BitPseudo-DiffADS7890(S)ADS7891
12-BitPseudo-DiffADS7886ADS7881
(1)S:Serial
1
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof
TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.
Copyright©2007,TexasInstrumentsIncorporated
ProductsconformtospecificationsperthetermsoftheTexas
Instrumentsstandardwarranty.Productionprocessingdoesnot
necessarilyincludetestingofallparameters.
www.ti.com
ABSOLUTEMAXIMUMRATINGS
(1)
ADS8471
SLAS517–DECEMBER2007
Thesedeviceshavelimitedbuilt-inESDprotection.Theleadsshouldbeshortedtogetherorthedeviceplacedinconductivefoam
duringstorageorhandlingtopreventelectrostaticdamagetotheMOSgates.
ORDERINGINFORMATION
(1)
MAXIMUMMAXIMUMNOMISSINGTRANS-
TEMPER-
INTEGRALDIFFERENTIALCODESPACKAGEPACKAGEORDERINGPORT
MODELATURE
LINEARITYLINEARITY(LSB)RESOLUTIONTYPEDESIGNATORINFORMATIONMEDIA
RANGE
(LSB)(BIT)QTY.
ADS8471IRGZTTapeand
reel250
7x748Pin–40°Cto
ADS8471I±2±116RGZ
QFN85°C
ADS8471IRGZRTapeand
reel1000
ADS8471IBRGZTTapeand
reel250
7x748Pin–40°Cto
ADS8471IB±1±0.7516RGZ
QFN85°C
ADS8471IBRGZRTapeand
reel1000
(1)Forthemostcurrentpackageandorderinginformation,seethePackageOptionAddendumattheendofthisdocument,orseetheTI
websiteatwww.ti.com.
overoperatingfree-airtemperaturerange(unlessotherwisenoted)
VALUEUNIT
+INtoAGND–0.4to+VA+0.1V
–INtoAGND–0.4to0.5V
Voltage+VAtoAGND–0.3to7V
+VBDtoBDGND–0.3to7V
+VAto+VBD–0.3to2.55V
DigitalinputvoltagetoBDGND–0.3to+VBD+0.3V
DigitaloutputvoltagetoBDGND–0.3to+VBD+0.3V
T
A
Operatingfree-airtemperaturerange–40to85°C
T
stg
Storagetemperaturerange–65to150°C
Junctiontemperature(T
J
max)150°C
Powerdissipation(T
J
Max–T
A
)/θ
JA
QFNpackage
θ
JA
thermalimpedance22°C/W
Vaporphase(60sec)215°C
Leadtemperature,soldering
Infrared(15sec)220°C
(1)Stressesbeyondthoselistedunderabsolutemaximumratingsmaycausepermanentdamagetothedevice.Thesearestressratings
only,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunderrecommendedoperating
conditionsisnotimplied.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmayaffectdevicereliability.
2SubmitDocumentationFeedbackCopyright©2007,TexasInstrumentsIncorporated
ProductFolderLink(s):ADS8471
www.ti.com
SPECIFICATIONS
ADS8471
SLAS517–DECEMBER2007
T
A
=–40°Cto85°C,+VA=5V,+VBD=3Vor5V,V
ref
=4.096V,f
SAMPLE
=1MSPS(unlessotherwisenoted)
PARAMETERTESTCONDITIONSMINTYPMAXUNIT
ANALOGINPUT
Full-scaleinputvoltage
(1)
+IN–(–IN)0V
ref
V
+IN–0.2V
ref
+0.2
AbsoluteinputvoltageV
–IN–0.20.2
Inputcapacitance65pF
Inputleakagecurrent1nA
SYSTEMPERFORMANCE
Resolution16Bits
ADS8471I16
NomissingcodesBits
ADS8471IB16
ADS8471I–2±0.72
LSB
INLIntegrallinearity
(2)(3)
(16bit)
ADS8471IB–1±0.71
ADS8471I–1±0.41
LSB
DNLDifferentiallinearity
(16bit)
ADS8471IB–0.75±0.40.75
ADS8471I–0.5±0.10.5
Offseterror
(4)
mV
ADS8471IB–0.5±0.10.5
ADS8471I±0.15
Offseterrortemperaturedriftppm/°C
ADS8471IB±0.15
ADS8471IV
ref
=4.096V–0.075±0.0150.075%FS
Gainerror
(4)(5)
ADS8471IBV
ref
=4.096V–0.075±0.0150.075%FS
ADS8471I±0.7
Gainerrortemperaturedriftppm/°C
ADS8471IB±0.7
Noise25µVRMS
PowersupplyrejectionratioAtFFFFhoutputcode60dB
SAMPLINGDYNAMICS
Conversiontime670700ns
Acquisitiontime270300ns
Throughputrate1MHz
Aperturedelay4ns
Aperturejitter5ps
Stepresponse150ns
Overvoltagerecovery150ns
(1)Idealinputspan,doesnotincludegainoroffseterror.
(2)LSBmeansleastsignificantbit
(3)ThisisendpointINL,notbestfit.
(4)Measuredrelativetoanidealfull-scaleinput[+IN–(–IN)]of8.192V
(5)Thisspecificationdoesnotincludetheinternalreferencevoltageerroranddrift.
Copyright©2007,TexasInstrumentsIncorporatedSubmitDocumentationFeedback3
ProductFolderLink(s):ADS8471
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | ADS8471 |
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