Texas Instruments ADS7279 Handleiding
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1
FEATURESAPPLICATIONS
DESCRIPTION
REF
+IN
REF+
SDI
SCLK
SDO
CDAC
SAR
COMPARATOR
OUTPUT
LATCH
and
3-STATE
DRIVER
CONVERSION
and
CONTROL
LOGIC
-IN
+IN1
+IN0
COM
NC
OSC
_
+
ADS7280ADS7279
FS/CS
CONVST
EOC/INT/CDI
ADS7279
ADS7280
www.ti.com
...............................................................................................................................................................SBAS436A–MAY2008–REVISEDJUNE2009
LOW-POWER,14-BIT,1MHz,SINGLE/DUALUNIPOLARINPUT,
ANALOG-TO-DIGITALCONVERTERSWITHSERIALINTERFACE
•Communications
23
•2.7Vto5.5VAnalogSupply,LowPower:
•TransducerInterface
–13.7mW(1MHz,+VA=3V,+VBD=1.8V)
•MedicalInstruments
•1MHzSamplingRate3V≤+VA≤5.5V,
•Magnetometers
900kHzSamplingRate2.7V≤+VA≤3V
•IndustrialProcessControl
•ExcellentDCPerformance:
•DataAcquisitionSystems
–±0.4LSBTyp,±1.0LSBMaxINL
•AutomaticTestEquipment
–±0.4LSBTyp,±1.0LSBMaxDNL
–±0.8mVMaxOffsetErrorat3V
–±1.25mVMaxOffsetErrorat5V
TheADS7279isalow-power,14-bit,1MSPS
•ExcellentACPerformanceatf
I
=10kHzwith
analog-to-digitalconverter(ADC)withaunipolar
85.9dBSNR,105.3dBSFDR,–100.1dBTHD
input.Thedeviceincludesa14-bit,capacitor-based
successiveapproximationregister(SAR)ADCwith
•Built-InConversionClock(CCLK)
inherentsample-and-hold.
•1.65Vto5.5VI/OSupply:
TheADS7280isbasedonthesamecoreand
–SPI™/DSP-CompatibleSerialInterface
includesa2-to-1inputMUXwithaprogrammable
–SCLKupto50MHz
TAGbitoutputoption.BoththeADS7279and
•ComprehensivePower-DownModes:
ADS7280offerahigh-speed,widevoltageserial
interface,andarecapableofdaisy-chainmode
–DeepPower-Down
operationwhenmultipleconvertersareused.
–NapPower-Down
Theseconvertersareavailablein4×4QFNand
–AutoNapPower-Down
TSSOP-16packages,andarefullyspecifiedfor
•UnipolarInputRange:0VtoV
REF
operationovertheindustrial–40°Cto+85°C
•SoftwareReset
temperaturerange.
•GlobalCONVST(IndependentofCS)
LowPower,High-SpeedSARConverterFamily
•ProgrammableStatus/PolarityEOC/INT
Type/Speed500kSPS1MSPS
•4×4QFN-16andTSSOP-16Packages
SingleADS8327ADS8329
•Multi-ChipDaisy-ChainMode
16-bitsingle-ended
DualADS8328ADS8330
•ProgrammableTAGBitOutput
SingleADS7279
•Auto/ManualChannelSelectMode(ADS7280)
14-bitsingle-ended
DualADS7280
SingleADS7229
12-bitsingle-ended
DualADS7230
1
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexas
Instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
2SPIisatrademarkofMotorola,Inc.
3Allothertrademarksarethepropertyoftheirrespectiveowners.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.
Copyright©2008–2009,TexasInstrumentsIncorporated
ProductsconformtospecificationsperthetermsoftheTexas
Instrumentsstandardwarranty.Productionprocessingdoesnot
necessarilyincludetestingofallparameters.
ABSOLUTEMAXIMUMRATINGS
(1)
ADS7279
ADS7280
SBAS436A–MAY2008–REVISEDJUNE2009...............................................................................................................................................................
www.ti.com
ThisintegratedcircuitcanbedamagedbyESD.TexasInstrumentsrecommendsthatallintegratedcircuitsbehandledwith
appropriateprecautions.Failuretoobserveproperhandlingandinstallationprocedurescancausedamage.
ESDdamagecanrangefromsubtleperformancedegradationtocompletedevicefailure.Precisionintegratedcircuitsmaybemore
susceptibletodamagebecauseverysmallparametricchangescouldcausethedevicenottomeetitspublishedspecifications.
ORDERINGINFORMATION
(1)
MAXIMUMMAXIMUMMAXIMUM
INTEGRALDIFFERENTIALOFFSETTRANSPORT
LINEARITYLINEARITYERRORPACKAGEPACKAGETEMPERATUREORDERINGMEDIA,
MODEL(LSB)(LSB)(mV)TYPEDESIGNATORRANGEINFORMATIONQUANTITY
ADS7279IRSATSmalltapeandreel,250
4×4QFN-16RSA
ADS7279IRSARTapeandreel,3000
ADS7279I±1±1±1.25–40°Cto+85°C
ADS7279IPWTube,90
TSSOP-16PW
ADS7279IPWRTapeandreel,2000
ADS7280IRSATSmalltapeandreel,250
4×4QFN-16RSA
ADS7280IRSARTapeandreel,3000
ADS7280I±1±1±1.25–40°Cto+85°C
ADS7280IPWTube,90
TSSOP-16PW
ADS7280IPWRTapeandreel,2000
(1)ForthemostcurrentpackageandorderinginformationseethePackageOptionAddendumattheendofthisdocument,orseetheTI
websiteatwww.ti.com.
Overoperatingfree-airtemperaturerange,unlessotherwisenoted.
ADS7279,ADS7280UNIT
+INtoAGND–0.3to+VA+0.3V
Voltage
–INtoAGND–0.3to+VA+0.3V
+VAtoAGND–0.3to7V
+REFtoAGND–0.3to+VA+0.3V
Voltagerange–REFtoAGND–0.3to0.3V
+VBDtoBDGND–0.3to7V
AGNDtoBDGND–0.3to0.3V
DigitalinputvoltagetoBDGND–0.3to+VBD+0.3V
DigitaloutputvoltagetoBDGND–0.3to+VBD+0.3V
T
A
Operatingfree-airtemperaturerange–40to+85°C
T
stg
Storagetemperaturerange–65to+150°C
T
J
maxJunctiontemperature+150°C
Powerdissipation(T
J
max–T
A
)/θ
JA
4×4QFN-16
package
θ
JA
thermalimpedance47°C/W
Powerdissipation(T
J
max–T
A
)/θ
JA
TSSOP-16
package
θ
JA
thermalimpedance86°C/W
(1)Stressesbeyondthoselistedunderabsolutemaximumratingsmaycausepermanentdamagetothedevice.Thesearestressratings
only,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunderrecommendedoperating
conditionsisnotimplied.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmayaffectdevicereliability.
2SubmitDocumentationFeedbackCopyright©2008–2009,TexasInstrumentsIncorporated
ProductFolderLink(s):ADS7279ADS7280
ELECTRICALCHARACTERISTICS
ADS7279
ADS7280
www.ti.com
...............................................................................................................................................................SBAS436A–MAY2008–REVISEDJUNE2009
AtT
A
=–40°Cto+85°C,+VA=4.5Vto5.5V,+VBD=+1.65Vto+5.5V,V
REF
=5V,andf
SAMPLE
=1MHz,unlessotherwise
noted.
ADS7279,ADS7280
PARAMETERTESTCONDITIONSMINTYPMAXUNIT
ANALOGINPUT
FSRFull-scaleinputvoltage
(1)
+IN–(–IN)or(+INx–COM)0V
REF
V
+IN,+IN0,+IN1AGND–0.2+VA+0.2
AbsoluteinputvoltageV
–INorCOMAGND–0.2AGND+0.2
Inputcapacitance45pF
Noongoingconversion,
Inputleakagecurrent50nA
dcinput
Atdc109
Inputchannelisolation,ADS7280onlydB
V
I
=±1.25V
PP
at50kHz101
SYSTEMPERFORMANCE
Resolution14Bits
NMCNomissingcodes14Bits
INLIntegrallinearity–1±0.41LSB
(2)
DNLDifferentiallinearity–1±0.41LSB
(2)
E
O
Offseterror
(3)
–1.25±0.31.25mV
OffseterrordriftFSR=5V±0.2ppm/°C
E
G
Gainerror–0.25±0.050.25%FSR
Gainerrordrift±0.5ppm/°C
Atdc70
CMRRCommon-moderejectionratiodB
V
I
=0.4V
PP
at1MHz50
Noise33µV
RMS
PSRRPower-supplyrejectionratioAtFFFFhoutputcode
(3)
78dB
SAMPLINGDYNAMICS
t
CONV
Conversiontime18CCLK
t
SAMPLE1
Manualtrigger3
AcquisitiontimeCCLK
t
SAMPLE2
Autotrigger3
Throughputrate1MHz
Aperturedelay5ns
Aperturejitter10ps
Stepresponse100ns
Overvoltagerecovery100ns
(1)Idealinputspan;doesnotincludegainoroffseterror.
(2)LSBmeansleastsignificantbit.
(3)Measuredrelativetoanidealfull-scaleinput[(+IN)–(–IN)]of4.096Vwhen+VA=5V.
Copyright©2008–2009,TexasInstrumentsIncorporatedSubmitDocumentationFeedback3
ProductFolderLink(s):ADS7279ADS7280
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | ADS7279 |
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