Texas Instruments ADS8507 Handleiding
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FEATURESAPPLICATIONS
DESCRIPTION
Successive Approximation Register
Clock
Comparator
CS
CDAC
Buffer
REF
CAP
R1
IN
40 kΩ
9.9 kΩ
Internal
+2.5 V Ref
6 kΩ
Parallel
and
Serial
Data
Out
&
Control
BUSYBUSY
DATACLK
TAG
20 kΩ
39.8 kΩ
R2
IN
EXT/IN
R/C
SB/BTC
BYTE
REFD
Parallel
Data
PWRD
SDATA
ADS8507
SLAS381–DECEMBER2006
16-BIT40-KSPSLOWPOWERSAMPLINGANALOG-TO-DIGITALCONVERTERWITH
INTERNALREFERENCEANDPARALLEL/SERIALINTERFACE
•IndustrialProcessControl
•40-kHzMinSamplingRate
•TestEquipment
•4-V,5-V,and±10-VInputRanges
•MedicalEquipment
•89.9-dBSINADwith10-kHzInput
•DataAcquisitionSystems
•±1.5LSBMaxINL
•DigitalSignalProcessing
•+1.5/–1LSBMaxDNL,16-BitNoMissing
•Instrumentation
Codes
•±5-mVBPZ,±0.4PPM/°CBPZDrift
•SPICompatibleSerialOutputWith
TheADS8507isacompletelowpower,single5-V
Daisy-Chain(TAG)Feature
supply,16-bitsamplinganalog-to-digital(A/D)
•Single5-VAnalogSupply
converter.Itcontainsacomplete16-bit
•Pin-CompatibleWithADS7807and12-Bit
capacitor-based,successiveapproximationregister
(SAR)A/Dconverterwithsampleandhold,clock,
ADS7806/8506
reference,anddatainterface.Theconvertercanbe
•UsesInternalorExternal2.5-VReference
configuredforavarietyofinputrangesincluding±10
•LowPowerDissipation
V,4V,and5V.Formostinputranges,theinput
–24mWTyp,30mWMaxat40KSPS
voltagecanswingto25Vor–25Vwithoutdamage
totheconverter.
•50-µWMaxPowerDownMode
ASPIcompatibleserialinterfaceallowsdatatobe
•28-PinSOPackage
synchronizedtoaninternalorexternalclock.Afull
•FullParallelInterface
parallelinterfacewithBYTEselectisalsoprovidedto
•2'sComporBTCOutputCode
allowthemaximumsystemdesignflexibility.The
ADS8507isspecifiedat40kHzsamplingrateover
theindustrial-40°Cto85°Ctemperaturerange.
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexas
Instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
QSPI,SPIaretrademarksofMotorola.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.
Copyright©2006,TexasInstrumentsIncorporated
ProductsconformtospecificationsperthetermsoftheTexas
Instrumentsstandardwarranty.Productionprocessingdoesnot
necessarilyincludetestingofallparameters.
www.ti.com
ABSOLUTEMAXIMUMRATINGS
ELECTRICALCHARACTERISTICS
ADS8507
SLAS381–DECEMBER2006
Thesedeviceshavelimitedbuilt-inESDprotection.Theleadsshouldbeshortedtogetherorthedeviceplacedinconductivefoam
duringstorageorhandlingtopreventelectrostaticdamagetotheMOSgates.
PACKAGE/ORDERINGINFORMATION
(1)
MINIMUM
NOMINIMUMSPECIFICATION
RELATIVEPACKAGEPACKAGEORDERINGTRANSPORT
PRODUCTMISSINGSINADTEMPERATURE
ACCURACYLEADDESIGNATORNUMBERMEDIA,QTY
CODE(dB)RANGE
(LSB)
ADS8507IBDWTube,20
ADS8507IB±1.51687-40°Cto85°CSO-28DW
ADS8507IBDWRTapeandReel,1000
ADS8507IDWTube,20
ADS8507I±31583-40°Cto85°CSO-28DW
ADS8507IDWRTapeandReel,1000
(1)Forthemostcurrentpackageandorderinginformation,seethePackageOptionAddendumattheendofthisdocument,orseetheTI
websiteatwww.ti.com.
overoperatingfree-airtemperaturerange(unlessotherwisenoted)
(1)
UNIT
R1
IN
±25V
AnaloginputsR2
IN
±25V
REF+V
ANA
+0.3VtoAGND2-0.3V
DGND,AGND2±0.3V
V
ANA
6V
Groundvoltagedifferences
V
DIG
toV
ANA
0.3V
V
DIG
6V
Digitalinputs-0.3Vto+V
DIG
+0.3V
Maximumjunctiontemperature165°C
Storagetemperaturerange–65°Cto150°C
Internalpowerdissipation700mW
Leadtemperature(soldering,1.6mmfromcase10seconds)260°C
(1)Allvoltagevaluesarewithrespecttonetworkgroundterminal.
AtT
A
=-40°Cto85°C,f
S
=40kHz,V
DIG
=V
ANA
=5V,andusinginternalreferenceandfixedresistors,(seeFigure43)
unlessotherwisespecified.
ADS8507IADS8507IB
PARAMETERTESTCONDITIONSUNIT
MINTYPMAXMINTYPMAX
Resolution1616Bits
ANALOGINPUT
-1010-1010
VoltagerangesSeeTable10505V
0404
Impedance
Capacitance4545pF
THROUGHPUTSPEED
Conversiontime2020µs
CompletecycleAcquireandconvert2525
Throughputrate4040kHz
DCACCURACY
INLIntegrallinearityerror-33-1.51.5LSB
(1)
(1)LSBmeansLeastSignificantBit.OneLSBforthe±10Vinputrangeis305µV.
2
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ADS8507
SLAS381–DECEMBER2006
ELECTRICALCHARACTERISTICS(continued)
AtT
A
=-40°Cto85°C,f
S
=40kHz,V
DIG
=V
ANA
=5V,andusinginternalreferenceandfixedresistors,(seeFigure43)
unlessotherwisespecified.
ADS8507IADS8507IB
PARAMETERTESTCONDITIONSUNIT
MINTYPMAXMINTYPMAX
DNLDifferentiallinearityerror-23-11.5LSB
Nomissingcodes1516Bits
Transitionnoise
(2)
0.80.8LSB
GainError±0.2±0.1%
Fullscaleerror
(3)(4)
-0.50.5-0.250.25%
Fullscaleerrordrift±7±5ppm/°C
Fullscaleerror
(3)(4)
Ext.2.5-VRef-0.50.5-0.250.25%
FullscaleerrordriftExt.2.5-VRef±0.5±0.5ppm/°C
Bipolarzeroerror
(3)
±10VRange-1010-55mV
Bipolarzeroerrordrift±10VRange±0.5±0.5ppm/°C
Unipolarzeroerror
(5)
0Vto5V,0Vto4VRanges-33-33mV
Unipolarzeroerrordrift0Vto5V,0Vto4VRanges±0.5±0.5ppm/°C
Recoverytimetoratedaccuracyfrom
2.2-µFCapacitortoCAP11ms
powerdown
(6)
Powersupplysensitivity
+4.75V<V
S
<+5.25V±8±8LSB
(V
DIG
=V
ANA
=V
S
)
ACACCURACY
SFDRSpurious-freedynamicrangef
IN
=1kHz,±10V9010096102dB
(7)
THDTotalharmonicdistortionf
IN
=1kHz,±10V-100-90-100-96dB
f
IN
=1kHz,±10V83888789.9
SINADSignal-to-(noise+distortion)dB
-60dBInput3032
SNRSignal-to-noise83888789.9dB
Usablebandwidth
(8)
f
IN
=1kHz,±10V130130kHz
Full-powerbandwidth(-3dB)600600kHz
SAMPLINGDYNAMICS
Aperturedelay4040ns
Aperturejitter2020ps
TransientresponseFSStep55µs
Overvoltagerecovery
(9)
750750ns
REFERENCE
InternalreferencevoltageNoload2.482.52.522.482.52.52V
Internalreferencesourcecurrent(must
11µA
useexternalbuffer)
Internalreferencedrift88ppm/°C
Externalreferencevoltagerangefor
2.32.52.72.32.52.7V
specifiedlinearity
ExternalreferencecurrentdrainExt.2.5-VRef100100µA
DIGITALINPUTS
V
IL
Low-levelinputvoltage-0.3+0.8-0.3+0.8V
V
IH
High-levelinputvoltage2.0V
D
+0.3V2.0V
D
+0.3VV
I
IL
Low-levelinputcurrentV
IL
=0V±10±10µA
(2)Typicalrmsnoiseatworstcasetransitions.
(3)Asmeasuredwithfixedresistors,seeFigure43.Adjustabletozerowithexternalpotentiometer.
(4)Fullscaleerroristheworstcaseof-FullScaleor+FullScaleuntrimmeddeviationfromidealfirstandlastcodetransitions,dividedby
thetransitionvoltage(notdividedbythefull-scalerange)andincludestheeffectofoffseterror.
(5)Asmeasuredwithfixedresistors,seeFigure43.Adjustabletozerowithexternalpotentiometer.
(6)ThisisthetimedelayaftertheADS8507isbroughtoutofPower-Downmodeuntilallinternalsettlingoccursandtheanaloginputis
acquiredtoratedaccuracy.AConvertcommandafterthisdelaywillyieldaccurateresults.
(7)AllspecificationsindBarereferredtoafull-scaleinput.
(8)Usablebandwidthdefinedasfull-scaleinputfrequencyatwhichSignal-to-(Noise+Distortion)degradesto60dB.
(9)Recoverstospecifiedperformanceafter2xFSinputovervoltage.
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Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | ADS8507 |
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