Texas Instruments ADS8405 Handleiding
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FEATURESAPPLICATIONS
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
RESET
4.096-V
Internal
Reference
REFOUT
ADS8405
SLAS427–DECEMBER2004
16-BIT,1.25-MSPS,UNIPOLARPSEUDO-DIFFERENTIALINPUT,MICROPOWER
SAMPLINGANALOG-TO-DIGITALCONVERTERWITHPARALLELINTERFACE
•DWDM
•UnipolarPseudo-DifferentialInput,0VtoV
ref
•Instrumentation
•16-BitNMCat1.25MSPS
•High-Speed,High-Resolution,ZeroLatency
•±2LSBINLMax,-1/+1.5LSBDNL
DataAcquisitionSystems
•86dBSNR,-90dBTHDat100kHzInput
•TransducerInterface
•ZeroLatency
•MedicalInstruments
•Internal4.096-VReference
•Communications
•High-SpeedParallelInterface
•Single5-VAnalogSupply
•WideI/OSupply:2.7Vto5.25V
TheADS8405isa16-bit,1.25-MHzA/Dconverter
withaninternal4.096-Vreference.Thedevicein-
•LowPower:155mWat1.25MHzTyp
cludesa16-bitcapacitor-basedSARA/Dconverter
•PinCompatibleWithADS8411/8401
withinherentsampleandhold.TheADS8405offersa
•48-PinTQFPPackage
full16-bitinterfaceandan8-bitoptionwheredatais
readusingtwo8-bitreadcyclesifnecessary.
TheADS8405hasaunipolarpseudo-differentialin-
put.Itisavailableina48-leadTQFPpackageandis
characterizedovertheindustrial-40°Cto85°Ctem-
peraturerange.
HighSpeedSARConverterFamily
Type/Speed500kHz~600kHz750kHz1MHz1.25MHz2MHz3MHz4MHz
ADS8383ADS8381
18-BitPseudo-Diff
ADS8380(S)
18-BitPseudo-Bipolar,FullyDiffADS8382(S)
16-BitPseudo-DiffADS8371ADS8401/05ADS8411
16-BitPseudo-Bipolar,FullyDiffADS8402/06ADS8412
14-BitPseudo-DiffADS7890(S)ADS7891
12-BitPseudo-DiffADS7886ADS7881
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexas
Instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.
Copyright©2004,TexasInstrumentsIncorporated
ProductsconformtospecificationsperthetermsoftheTexas
Instrumentsstandardwarranty.Productionprocessingdoesnot
necessarilyincludetestingofallparameters.
www.ti.com
ABSOLUTEMAXIMUMRATINGS
ADS8405
SLAS427–DECEMBER2004
ORDERINGINFORMATION
(1)
MAXIMUMMAXIMUMNOMISSING
TRANSPORT
INTEGRALDIFFERENTIALCODESPACKAGEPACKAGETEMPERATUREORDERING
MODELMEDIA
LINEARITYLINEARITYRESOLUTIONTYPEDESIGNATORRANGEINFORMATION
QUANTITY
(LSB)(LSB)(BIT)
Tapeandreel
ADS8405IPFBT
250
ADS8405I–4to+4–2to+21548PinTQFPPFB–40°Cto85°C
Tapeandreel
ADS8405IPFBR
1000
Tapeandreel
ADS8405IBPFBT
250
ADS8405IB–2to+2–1to+1.51648PinTQFPPFB–40°Cto85°C
Tapeandreel
ADS8405IBPFBR
1000
(1)Forthemostcurrentspecificationsandpackageinformation,refertoourwebsiteatwww.ti.com.
overoperatingfree-airtemperaturerangeunlessotherwisenoted
(1)
UNIT
+INtoAGND–0.4Vto+VA+0.1V
–INtoAGND–0.4Vto0.5V
Voltage+VAtoAGND–0.3Vto7V
+VBDtoBDGND–0.3Vto7V
+VAto+VBD–0.3Vto2.55V
DigitalinputvoltagetoBDGND–0.3Vto+VBD+0.3V
DigitaloutputvoltagetoBDGND–0.3Vto+VBD+0.3V
T
A
Operatingfree-airtemperaturerange–40°Cto85°C
T
stg
Storagetemperaturerange–65°Cto150°C
Junctiontemperature(T
J
max)150°C
Powerdissipation(T
J
Max–T
A
)/θ
JA
TQFPpackage
θ
JA
thermalimpedance86°C/W
Vaporphase(60sec)215°C
Leadtemperature,soldering
Infrared(15sec)220°C
(1)Stressesbeyondthoselistedunderabsolutemaximumratingsmaycausepermanentdamagetothedevice.Thesearestressratings
only,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunderrecommendedoperating
conditionsisnotimplied.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmayaffectdevicereliability.
2
www.ti.com
SPECIFICATIONS
ADS8405
SLAS427–DECEMBER2004
T
A
=–40°Cto85°C,+VA=5V,+VBD=3Vor5V,V
ref
=4.096V,f
SAMPLE
=1.25MHz(unlessotherwisenoted)
PARAMETERTESTCONDITIONSMINTYPMAXUNIT
ANALOGINPUT
Full-scaleinputvoltage
(1)
+IN–(–IN)0V
ref
V
+IN–0.2V
ref
+0.2
AbsoluteinputvoltageV
–IN–0.20.2
Inputcapacitance25pF
Inputleakagecurrent0.5nA
SYSTEMPERFORMANCE
Resolution16Bits
ADS8405I15
NomissingcodesBits
ADS8405IB16
ADS8405I–4±24
INLIntegrallinearity
(2)(3)
LSB
ADS8405IB–2±12
ADS8405I–2±12
DNLDifferentiallinearityLSB
ADS8405IB–1±0.751.5
ADS8405I–3±13mV
E
O
Offseterror
(4)
ADS8405IB–1.5±0.51.5mV
ADS8405I–0.150.15
E
G
Gainerror
(4)(5)
%FS
ADS8405IB–0.0980.98
Noise60µVRMS
AtFFFFhoutputcode,+VA=4.75V
DCPowersupplyrejectionratio2LSB
to5.25V,V
ref
=4.096V
(4)
SAMPLINGDYNAMICS
Conversiontime500650ns
Acquisitiontime150ns
Throughputrate1.25MHz
Aperturedelay2ns
Aperturejitter25ps
Stepresponse100ns
Overvoltagerecovery100ns
DYNAMICCHARACTERISTICS
VIN=4V
p-p
at100kHz–90dB
THDTotalharmonicdistortion
(6)
VIN=4V
p-p
at500kHz–88.5dB
SNRSignal-to-noiseratioVIN=4V
p-p
at100kHz86dB
SINADSignal-to-noise+distortionVIN=4V
p-p
at100kHz85dB
VIN=4V
p-p
at100kHz90dB
SFDRSpuriousfreedynamicrange
VIN=4V
p-p
at500kHz88dB
-3dBSmallsignalbandwidth5MHz
EXTERNALVOLTAGEREFERENCEINPUT
ReferencevoltageatREFIN,V
ref
2.54.0964.2V
Referenceresistance
(7)
500kΩ
(1)Idealinputspan,doesnotincludegainoroffseterror.
(2)LSBmeansleastsignificantbit
(3)ThisisendpointINL,notbestfit.
(4)Measuredrelativetoanidealfull-scaleinput(+IN–(–IN))of4.096V.
(5)Thisspecificationdoesnotincludetheinternalreferencevoltageerroranddrift.
(6)Calculatedonthefirstnineharmonicsoftheinputfrequency.
(7)Canvary±20%
3
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | ADS8405 |
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