Texas Instruments ADS8548 Handleiding
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−40−25−105203550658095110125
Temperature (°C)
Signal-to-Noise Ratio (dB)
ADS8568
ADS8548
ADS8528
G016
SAR ADC
Control
Logic
Config
Register
I/O
SAR ADC
SAR ADC
SAR ADC
SAR ADC
SAR ADC
SAR ADC
SAR ADC
String DAC
CH_A0
CH_A1
CH_B0
CH_B1
CH_C0
CH_C1
CH_D0
CH_D1
REFIO
Parallel
or Serial
Data Bus
Control
Signal
Bus
Clock
Generator
2.5-V, 3-V
Reference
Product
Folder
Order
Now
Technical
Documents
Tools &
Software
Support &
Community
Reference
Design
AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,
intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.
ADS8528
,
ADS8548
,
ADS8568
SBAS543C–AUGUST2011–REVISEDFEBRUARY2016
ADS85x812-,14-,and16-Bit,8-Channel,SimultaneousSamplingADCs
1
1Features
1
•Familyof12-,14-,and16-Bit,Pin-andSoftware-
CompatibleADCs
•MaximumDataRateperChannel:
–ADS8528:650kSPS(PAR)or
480kSPS(SER)
–ADS8548:600kSPS(PAR)or
450kSPS(SER)
–ADS8568:510kSPS(PAR)or
400kSPS(SER)
•ExcellentACPerformance:
–Signal-to-NoiseRatio:
ADS8528:73.9dB,ADS8548:85dB,
ADS8568:91.5dB
–TotalHarmonicDistortion:
ADS8528:–89dB,ADS8548:–91dB,
ADS8568:–94dB
•Programmable,BufferedInternalReference:
0.5V–2.5Vor0.5V–3.0VSupportsInput
VoltageRangesupto±12V
•SelectableParallelorSerialInterface
•ScalableLow-PowerOperationUsingAuto-Sleep
Mode:Only32mWat10kSPS
•FullySpecifiedOverExtendedIndustrial
TemperatureRange
2Applications
•ProtectionRelays
•PowerQualityMeasurement
•Multi-AxisMotorControls
•ProgrammableLogicControllers
•IndustrialDataAcquisition
SNRvsTemperature
3Description
TheADS85x8containeightlow-power,12-,14-,or
16-bit,successiveapproximationregister(SAR)-
basedanalog-to-digitalconverters(ADCs)withtrue
bipolarinputs.Thesechannelsaregroupedinfour
pairs,thusallowingsimultaneoushigh-speedsignal
acquisitionofupto650kSPS.
Thedevicessupportselectableparallelorserial
interfacewithdaisy-chaincapability.The
programmablereferenceallowshandlingofanalog
inputsignalswithamplitudesupto±12V.
TheADS85x8familysupportsanauto-sleepmodefor
minimumpowerdissipationandisavailableinboth
64-pinVQFNandLQFPpackages.Theentirefamily
isspecifiedoveratemperaturerangeof–40°Cto
+125°C.
DeviceInformation
(1)
PARTNUMBERPACKAGEBODYSIZE(NOM)
ADS85x8
VQFN(64)9.00mm×9.00mm
LQFP(64)10.00mm×10.00mm
(1)Forallavailablepackages,seetheorderableaddendumat
theendofthedatasheet.
SimplifiedBlockDiagram
2
ADS8528
,
ADS8548
,
ADS8568
SBAS543C–AUGUST2011–REVISEDFEBRUARY2016
www.ti.com
ProductFolderLinks:ADS8528ADS8548ADS8568
SubmitDocumentationFeedbackCopyright©2011–2016,TexasInstrumentsIncorporated
TableofContents
1Features..................................................................1
2Applications...........................................................1
3Description.............................................................1
4RevisionHistory.....................................................2
5DeviceComparisonTable.....................................4
6PinConfigurationandFunctions.........................4
7Specifications.........................................................9
7.1AbsoluteMaximumRatings......................................9
7.2ESDRatings..............................................................9
7.3RecommendedOperatingConditions.......................9
7.4ThermalInformation..................................................9
7.5ElectricalCharacteristics:General..........................10
7.6ElectricalCharacteristics:ADS8528.......................13
7.7ElectricalCharacteristics:ADS8548.......................14
7.8ElectricalCharacteristics:ADS8568.......................15
7.9SerialInterfaceTimingRequirements.....................16
7.10ParallelInterfaceTimingRequirements(Read
Access)....................................................................17
7.11ParallelInterfaceTimingRequirements(Write
Access)....................................................................17
7.12TypicalCharacteristics..........................................20
8ParameterMeasurementinformation................26
8.1EquivalentCircuits..................................................26
9DetailedDescription............................................26
9.1Overview.................................................................26
9.2FunctionalBlockDiagram.......................................27
9.3FeatureDescription.................................................28
9.4DeviceFunctionalModes........................................34
9.5RegisterMaps........................................................39
10ApplicationandImplementation........................41
10.1ApplicationInformation..........................................41
10.2TypicalApplication................................................41
11PowerSupplyRecommendations.....................46
12Layout...................................................................46
12.1LayoutGuidelines.................................................46
12.2LayoutExample....................................................47
13DeviceandDocumentationSupport.................48
13.1DocumentationSupport.......................................48
13.2RelatedLinks........................................................48
13.3CommunityResources..........................................48
13.4Trademarks...........................................................48
13.5ElectrostaticDischargeCaution............................48
13.6Glossary................................................................48
14Mechanical,Packaging,andOrderable
Information...........................................................48
4RevisionHistory
NOTE:Pagenumbersforpreviousrevisionsmaydifferfrompagenumbersinthecurrentversion.
ChangesfromRevisionB(November2015)toRevisionCPage
•ChangedFigure45:changedcapacitorvaluesfrom820nFto820pF..............................................................................42
ChangesfromRevisionA(October2011)toRevisionBPage
•AddedESDRatingstable,RecommendedOperatingConditionstable,FeatureDescriptionsection,Device
FunctionalModessection,RegisterMapssection,ApplicationandImplementationsection,PowerSupply
Recommendationssection,Layoutsection,DeviceandDocumentationSupportsection,andMechanical,
Packaging,andOrderableInformationsection......................................................................................................................1
•ChangedtitleofDeviceComparisonTable,deletedfootnote1............................................................................................4
•AddedStoragetemperatureparametertoAbsoluteMaximumRatingstable........................................................................9
•ChangedClockcyclesperconversiontobeasingleparameterinsteadofpartoft
CONV
parameterinSerialInterface
TimingRequirementstable..................................................................................................................................................16
•Changedt
BUFS
parameterinSerialInterfaceTimingRequirementstable............................................................................16
•Addedfootnote3toSerialInterfaceTimingRequirementstable.........................................................................................16
•ChangedClockcyclesperconversiontobeasingleparameterinsteadofpartoft
CONV
parameterinParallel
InterfaceTimingRequirements(ReadAccess)table..........................................................................................................17
•Changedt
BUCS
parameterinParallelInterfaceTimingRequirements(ReadAccess)table...............................................17
•Addedfootnote3toParallelInterfaceTimingRequirements(ReadAccess)table............................................................17
•ChangedDataReadoutandBUSY/INTSignalsection........................................................................................................30
•AddedSequentialOperationsection....................................................................................................................................31
•ChangeddescriptionofinitiatinganewconversioninResetandPower-DownModessection..........................................38
3
ADS8528
,
ADS8548
,
ADS8568
www.ti.com
SBAS543C–AUGUST2011–REVISEDFEBRUARY2016
ProductFolderLinks:ADS8528ADS8548ADS8568
SubmitDocumentationFeedbackCopyright©2011–2016,TexasInstrumentsIncorporated
ChangesfromOriginal(August2011)toRevisionAPage
•DeletedINLcolumnfromFamily/OrderingInformationtable.................................................................................................4
•ChangedDCAccuracy,INLparameterinADS8568ElecticalChatacteristicstable............................................................15
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | ADS8548 |
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