Texas Instruments ADS8512 Handleiding
Pagina's 34 Niet gecategoriseerd
Bekijk de handleiding van Texas Instruments ADS8512 gratis online of download de PDF. Deze handleiding is 0 keer bekeken. Vraag over dit model? Stel een vraag
1
FEATURESAPPLICATIONS
DESCRIPTION
SuccessiveApproximationRegister
Clock
Comparator
CDAC
Buffer
REF
BUF
R1
IN
8kW
Internal
+2.5VRef
4kW
Serial
Data
Out
and
Control
40kW
R2
IN
EXT/INT
PWRD
BUSY
CS
CONV
SDATA
DATACLK
CAP
20kW
R3
IN
ADS8512
www.ti.com
......................................................................................................................................................................................................SLAS485–JUNE2008
12-Bit,40-kSPS,LowPowerSamplingANALOG-TO-DIGITALCONVERTER
withInternalReferenceandSerialInterface
•IndustrialProcessControl
234
•40-kHzMinimumSamplingRate
•TestEquipment
•VeryLowPower:25mW
•Robotics
•±3.33-V,±5-V,±10-V,4-V,and10-VInput
•DSPServoControl
Ranges
•MedicalInstrumentation
•73.9-dBSINADwith10-kHzInput
•PortableDataAcquisitionSystems
•±0.5LSBMaxINL
•±0.5LSBMaxDNL,12-BitNMC
•±5-mVBPZ,±2ppm/°CBPZDrift
TheADS8512isacompletelow-power,single5-V
•72-dBMinSINAD,80-dBMinSFDR
supply,12-bitsamplinganalog-to-digital(A/D)
•UsesInternalorExternal2.5-VReference
converter.Itcontainsacomplete12-bit
capacitor-based,successiveapproximationregister
•NoExternalCalibrationResistorsRequired
(SAR)A/Dconverterwithsample-and-hold(S/H),
•Single5-VAnalogSupply:
clock,reference,andserialdatainterface.The
–32.5-mWMaxPowerDissipation
convertercanbeconfiguredforavarietyofinput
rangesincluding±10V,±5V,0Vto10V,and0.5V
–50-µWMaxPower-DownMode
to4.5V.Ahigh-impedance,0.3-Vto2.8-Vinputis
•SPI™-CompatibleSerialPortupto20MHz,
alsoavailablewithinputimpedancegreaterthan10
withMaster/SlaveFeature
MΩ.Formostinputranges,theinputvoltagecan
•GlobalCONVand3-StatedBusforMulti-Chip
swingto25Vor–25Vwithoutdamagetothe
SimultaneousS/HOperation
converter.
•Pin-CompatiblewithADS7812and16-Bit
AnSPI-compatibleserialinterfaceallowsdatatobe
ADS7813/8513
synchronizedtoaninternalorexternalclock.The
ADS8512isspecifiedat40-kHzsamplingrateover
•SO-16Package
the–40°Cto+85°Cindustrialtemperaturerange.
1
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexas
Instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
2TMS320isatrademarkofTexasInstruments.
3SPIisatrademarkofMotorola,Inc.
4Allothertrademarksarethepropertyoftheirrespectiveowners.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.
Copyright©2008,TexasInstrumentsIncorporated
ProductsconformtospecificationsperthetermsoftheTexas
Instrumentsstandardwarranty.Productionprocessingdoesnot
necessarilyincludetestingofallparameters.
ABSOLUTEMAXIMUMRATINGS
(1)(2)
ELECTRICALCHARACTERISTICS
ADS8512
SLAS485–JUNE2008......................................................................................................................................................................................................
www.ti.com
Thesedeviceshavelimitedbuilt-inESDprotection.Theleadsshouldbeshortedtogetherorthedeviceplacedinconductivefoam
duringstorageorhandlingtopreventelectrostaticdamagetotheMOSgates.
PACKAGE/ORDERINGINFORMATION
(1)
MINIMUMNOMINIMUMSPECIFIED
INLMISSINGSINADTEMPERATUREPACKAGE-PACKAGEORDERINGTRANSPORT
PRODUCT(LSB)CODES(dB)RANGELEADDESIGNATORNUMBERMEDIA,QUANTITY
ADS8512IBDWTube,20
ADS8512IB±0.51272-40°Cto+85°CSO-16DW
ADS8512IBDWRTapeandReel,1000
ADS8512IDWTube,20
ADS8512I±11270-40°Cto+85°CSO-16DW
ADS8512IDWRTapeandReel,1000
(1)Forthemostcurrentpackageandorderinginformation,seethePackageOptionAddendumattheendofthisdocument,orseetheTI
websiteatwww.ti.com.
Overoperatingfree-airtemperaturerange(unlessotherwisenoted).
PARAMETERUNIT
R1
IN
±25V
R2
IN
±25V
Analoginputs
R3
IN
±25V
REFV
S
+0.3VtoGND–0.3V
GND±0.3V
Groundvoltagedifferences
V
S
6V
Digitalinputs–0.3VtoV
S
+0.3V
Maximumjunctiontemperature+165°C
Storagetemperaturerange–65°Cto+150°C
Internalpowerdissipation700mW
Leadtemperature(soldering,1,6mmfromcase,10seconds)+260°C
(1)StressesabovethoselistedunderAbsoluteMaximumRatingsmaycausepermanentdamagetothedevice.Exposuretoabsolute
maximumconditionsforextendedperiodsmayaffectdevicereliability.
(2)Allvoltagevaluesarewithrespecttonetworkgroundterminal.
AtT
A
=-40°Cto+85°C,f
S
=40kHz,V
S
=5V,andusinginternalreferenceandfixedresistors,unlessotherwisespecified.
ADS8512IADS8512IB
PARAMETERTESTCONDITIONSMINTYPMAXMINTYPMAXUNIT
Resolution1212Bits
ANALOGINPUT
VoltagerangesSeeTable1SeeTable1V
ImpedanceSeeTable1SeeTable1kΩ
Capacitance4545pF
THROUGHPUTSPEED
Conversiontime2020µs
CompletecycleAcquireandconvert2525µs
Throughputrate4040kHz
2SubmitDocumentationFeedbackCopyright©2008,TexasInstrumentsIncorporated
ProductFolderLink(s):ADS8512
ADS8512
www.ti.com
......................................................................................................................................................................................................SLAS485–JUNE2008
ELECTRICALCHARACTERISTICS(continued)
AtT
A
=-40°Cto+85°C,f
S
=40kHz,V
S
=5V,andusinginternalreferenceandfixedresistors,unlessotherwisespecified.
ADS8512IADS8512IB
PARAMETERTESTCONDITIONSMINTYPMAXMINTYPMAXUNIT
DCACCURACY
INLIntegrallinearityerror–1±0.11–0.5±0.10.5LSB
(1)
DNLDifferentiallinearityerror–1±0.11–0.5±0.10.5LSB
Nomissingcodes1212Bits
Transitionnoise
(2)
0.050.05LSB
Gainerror±0.2±0.1%
Fullscaleerror
(3)(4)
-0.50.5–0.250.25%
Fullscaleerrordrift±10±10ppm/°C
Fullscaleerror
(3)(4)
External2.5-Vreference–0.50.5–0.250.25%
FullscaleerrordriftExternal2.5-Vreference±0.5±0.5ppm/°C
Bipolarzeroerror
(3)
Bipolarranges–1010–55mV
BipolarzeroerrordriftBipolarranges±2±2ppm/°C
Unipolarzeroerror
(3)
Unipolarranges–66–66mV
UnipolarzeroerrordriftUnipolarranges±3±3ppm/°C
Recoverytimetoratedaccuracyfrom
1-µFcapacitortoCAP300300µs
powerdown
(5)
Power-supplysensitivity+4.75V<V
S
<+5.25V±0.75±0.75LSB
ACACCURACY
SFDRSpurious-freedynamicrangef
IN
=1kHz,±10V80988098dB
(6)
THDTotalharmonicdistortionf
IN
=1kHz,±10V–96–80–98–80dB
f
IN
=1kHz,±10V70747274
SINADSignal-to-(noise+distortion)dB
–60dBinput3032
SNRSignal-to-noisef
IN
=1kHz,±10V70747274dB
Usablebandwidth
(7)
130130kHz
Full-powerbandwidth(–3dB)600600kHz
SAMPLINGDYNAMICS
Aperturedelay4040ns
Aperturejitter2020ps
TransientresponseFSstep55µs
Overvoltagerecovery
(8)
750750ns
REFERENCE
InternalreferencevoltageNoload2.482.52.522.482.52.52V
Internalreferencesourcecurrent(must
11µA
useexternalbuffer)
Internalreferencedrift88ppm/°C
Externalreferencevoltagerangefor
2.32.52.72.32.52.7V
specifiedlinearity
ExternalreferencecurrentdrainExternal2.5-Vreference100100µA
(1)LSBmeansleastsignificantbit.1LSBforthe±10Vinputrangeis305µV.
(2)Typicalrmsnoiseatworst-casetransitions.
(3)Asmeasuredwithfixedresistors.Adjustabletozerowithexternalpotentiometer.
(4)Full-scaleerroristheworstcaseof–FullScaleor+FullScaledeviationfromidealfirstandlastcodetransitions,dividedbythefull-scale
range;includestheeffectofoffseterror.Testedat–40°Cto+85°C.
(5)TimedelayaftertheADS8512isbroughtoutofPower-Downmodeuntilallinternalsettlingoccursandtheanaloginputisacquiredto
ratedaccuracy.AConvertcommandafterthisdelayyieldsaccurateresults.
(6)AllspecificationsindBarereferredtoafull-scaleinput.
(7)Usablebandwidthdefinedasfull-scaleinputfrequencyatwhichSignal-to-(Noise+Distortion)degradesto60dB.
(8)Recoverstospecifiedperformanceafter2xFSinputovervoltage.
Copyright©2008,TexasInstrumentsIncorporatedSubmitDocumentationFeedback3
ProductFolderLink(s):ADS8512
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | ADS8512 |
Heb je hulp nodig?
Als je hulp nodig hebt met Texas Instruments ADS8512 stel dan hieronder een vraag en andere gebruikers zullen je antwoorden