Texas Instruments ADS8325 Handleiding
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ADS8325
ADS8325
1
FEATURESDESCRIPTION
APPLICATIONS
SAR
Serial
Interface
Comparator
ADS8325
S/HAmp
DCLOCK
D
OUT
CS/SHDN
+IN
REF
-IN
CDAC
ADS8325
SBAS226C–MARCH2002–REVISEDAUGUST2007
16-Bit,High-Speed,2.7Vto5.5VmicroPowerSampling
ANALOG-TO-DIGITALCONVERTER
23
•16-BitsNoMissingCodes
TheADS8325isa16-bit,sampling,Analog-to-Digital
(A/D)converterspecifiedforasupplyvoltagerange
•VeryLowNoise:3LSB
PP
from2.7Vto5.5V.Itrequiresverylittlepower,even
•ExcellentLinearity:±1.5LSBtyp
whenoperatingatthefull100kHzdatarate.Atlower
•microPower:
datarates,thehighspeedofthedeviceenablesitto
–4.5mWat100kHzspendmostofitstimeinthepower-downmode.For
example,theaveragepowerdissipationislessthan
–1mWat10kHz
1mWata10kHzdatarate.
•MSOP-8andSON-8Packages(SONPackage
TheADS8325offersexcellentlinearityandverylow
SizeSameas3x3QFN)
noiseanddistortion.Italsofeaturesasynchronous
•16-BitUpgradetothe12-BitADS7816and
serial(SPI/SSIcompatible)interfaceandadifferential
ADS7822
input.Thereferencevoltagecanbesettoanylevel
•Pin-CompatibleWiththeADS7816,ADS7822,
withintherangeof2.5VtoV
DD
.
ADS7826,ADS7827,ADS7829,andADS8320
LowpowerandsmallsizemaketheADS8325ideal
•Serial(SPI™/SSI)Interfaces
forportableandbattery-operatedsystems.Itisalsoa
perfectfitforremotedataacquisitionmodules,
simultaneousmultichannelsystems,andisolated
dataacquisition.TheADS8325isavailablein
•Battery-OperatedSystems
MSOP-8andSON-8packages.TheSONpackage
•RemoteDataAcquisition
sizeisthesameasa3x3QFNpackage.
•IsolatedDataAcquisition
•SimultaneousSampling,Multi-Channel
Systems
•IndustrialControls
•Robotics
•VibrationAnalysis
1
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof
TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
2SPIisatrademarkofMotorola,Inc.
3Allothertrademarksarethepropertyoftheirrespectiveowners.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.
Copyright©2002–2007,TexasInstrumentsIncorporated
ProductsconformtospecificationsperthetermsoftheTexas
Instrumentsstandardwarranty.Productionprocessingdoesnot
necessarilyincludetestingofallparameters.
www.ti.com
ABSOLUTEMAXIMUMRATINGS
(1)
PACKAGEDISSIPATIONRATINGS
ADS8325
SBAS226C–MARCH2002–REVISEDAUGUST2007
ThisintegratedcircuitcanbedamagedbyESD.TexasInstrumentsrecommendsthatallintegratedcircuitsbehandledwith
appropriateprecautions.Failuretoobserveproperhandlingandinstallationprocedurescancausedamage.
ESDdamagecanrangefromsubtleperformancedegradationtocompletedevicefailure.Precisionintegratedcircuitsmaybemore
susceptibletodamagebecauseverysmallparametricchangescouldcausethedevicenottomeetitspublishedspecifications.
PACKAGE/ORDERINGINFORMATION
(1)
MAXIMUM
INTEGRALNOMISSINGSPECIFIED
LINEARITYCODESERRORPACKAGE-PACKAGETEMPERATUREPACKAGEORDERINGTRANSPORTMEDIA,
PRODUCTERROR(LSB)(LSB)
(2)
LEADDESIGNATORRANGEMARKINGNUMBERQUANTITY
ADS8325IDGKTTapeandReel,250
ADS8325I±615MSOP-8DGK–40°Cto+85°CB25
ADS8325IDGKRTapeandReel,2500
ADS8325IBDGKTTapeandReel,250
ADS8325IB±416MSOP-8DGK–40°Cto+85°CB25
ADS8325IBDGKRTapeandReel,2500
ADS8325IDRBTTapeandReel,250
ADS8325I±615SON-8DRB–40°Cto+85°CB25
ADS8325IDRBRTapeandReel,2500
ADS8325IBDRBTTapeandReel,250
ADS8325IB±416SON-8DRB–40°Cto+85°CB25
ADS8325IBDRBRTapeandReel,2500
(1)Forthemostcurrentspecificationsandpackageinformation,refertoourwebsiteatwww.ti.com.
(2)NoMissingCodesErrorspecifiesa5Vpowersupplyandreferencevoltage.
Overoperatingfree-airtemperaturerange(unlessotherwisenoted)
ADS8325UNIT
Supplyvoltage,DGNDtoV
DD
–0.3to6V
Analoginputvoltage
(2)
–0.3toV
DD
+0.3V
Referenceinputvoltage
(2)
–0.3toV
DD
+0.3V
Digitalinputvoltage
(2)
–0.3toV
DD
+0.3V
Inputcurrenttoanypinexceptsupply–20to20mA
PowerdissipationSeeDissipationRatingTable
T
J
Operatingvirtualjunctiontemperaturerange–40to+150°C
T
A
Operatingfree-airtemperaturerange–40to+85°C
T
STG
Storagetemperaturerange–65to+150°C
Leadtemperature1,6mm(1/16inch)fromcasefor10sec+260°C
(1)Stressesbeyondthoselistedunderabsolutemaximumratingsmaycausepermanentdamagetothedevice.Thesearestressratings
only,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunderrecommendedoperating
conditionsisnotimplied.Exposuretoabsolute-maximum-ratedconditionsofextendedperiodsmayaffectdevicereliability.
(2)Allvoltagevaluesarewithrespecttogroundterminal.
DERATINGFACTORT
A
≤+25°CT
A
=+70°CT
A
=+85°C
PACKAGER
θJC
R
θJA
ABOVET
A
=+25°CPOWERRATINGPOWERRATINGPOWERRATING
DGK39.1°C/W206.3°C/W4.847mW/°C606mW388mW315mW
DRB5°C/W45.8°C/W3.7mW/C370mW204mW148mW
2SubmitDocumentationFeedbackCopyright©2002–2007,TexasInstrumentsIncorporated
ProductFolderLink(s):ADS8325
www.ti.com
R
ON
50W
C
(SAMPLE)
40pF
Shut-Down
Switch
V
DD
I/O
GND
V
DD
ANALOGIN
GND
DiodeTurn-OnVoltage:0.35V
EquivalentAnalogInputCircuit
V
DD
REF
GND
EquivalentReference
InputCircuit
EquivalentDigitalInput/OutputCircuit
20pF
5kW
RECOMMENDEDOPERATINGCONDITIONS
ELECTRICALCHARACTERISTICS:V
DD
=+5V
ADS8325
SBAS226C–MARCH2002–REVISEDAUGUST2007
EQUIVALENTINPUTCIRCUIT
Overoperatingfree-airtemperaturerange(unlessotherwisenoted)
MINTYPMAXUNIT
Low-voltagelevels2.73.6V
Supplyvoltage,GNDtoV
DD
5Vlogiclevels4.55.05.5V
Referenceinputvoltage2.5V
DD
V
–IN–0.300.5V
Analoginputvoltage
+IN–(–IN)0V
REF
V
T
J
Operatingjunctiontemperaturerange–40+125°C
Overrecommendedoperatingfree-airtemperatureat–40°Cto+85°C,V
REF
=5V,–IN=GND,f
SAMPLE
=100kHz,andf
CLK
=
24×f
SAMPLE
,unlessotherwisenoted.
ADS8325IADS8325IB
PARAMETERTESTCONDITIONSMINTYPMAXMINTYPMAXUNIT
ANALOGINPUT
Full-scalerangeFSR+IN–(–IN)0V
REF
0V
REF
V
Operatingcommon-modesignal–0.30.5–0.30.5V
Inputresistance–IN=GND55GΩ
Inputcapacitance–IN=GND,duringsampling4545pF
Inputleakagecurrent–IN=GND±50±50nA
Differentialinputcapacitance+INto–IN,duringsampling2020pF
Full-powerbandwidthFSBWFSsinewave,SINAD=–3dB2020kHz
DCACCURACY
Resolution1616Bits
NomissingcodeNMC1516Bits
IntegrallinearityerrorINL±3±6±1.5±4LSB
OffseterrorV
OS
±0.75±1.5±0.5±1mV
OffseterrordriftTCV
OS
±0.2±0.2ppm/°C
GainerrorG
ERR
±24±12LSB
GainerrordriftTCG
ERR
±3±3ppm/°C
Noise2020μVRMS
Power-supplyrejection4.75V≤V
DD
≤5.25V33LSB
SAMPLINGDYNAMICS
Conversiontimet
CONV
24kHz<f
CLK
≤2.4MHz6.667666.76.667666.7μs
Acquisitiontimet
AQ
f
CLK
=2.4MHz1.8751.875μs
Throughputrate100100kSPS
Clockfrequency0.0242.40.0242.4MHz
ACACCURACY
Copyright©2002–2007,TexasInstrumentsIncorporatedSubmitDocumentationFeedback3
ProductFolderLink(s):ADS8325
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | ADS8325 |
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