Texas Instruments ADS8578S Handleiding
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AIN_1P
AIN_1GND
AIN_2P
AIN_2GND
AIN_7P
AIN_7GND
AIN_8P
AIN_8GND
14-Bit
SAR
ADC
2.5 V
REF
REFGND
AGND
DVDD
AVDD
ADS8578S
ADC
Driver
REFIN/REFOUT
REFCAPB
REFSEL
Digital Filter
OS2
OS0
OS1
SAR
Logic
and
Digital Control
DB[15:0]
DOUTA
DOUTB
PAR/SER
RANGE
RD/SCLK
CS
RESET
CONVSTA, CONVSTB
FRSTDATA
STBY
REFCAPA
BUSY
1 M:
Clamp
1 M:
3rd-Order
LPF
Clamp
PGA
ADC
Driver
1 M:
Clamp
1 M:
3rd-Order
LPF
Clamp
PGA
ADC
Driver
1 M:
Clamp
1 M:
3rd-Order
LPF
Clamp
PGA
ADC
Driver
1 M:
Clamp
1 M:
3rd-Order
LPF
Clamp
PGA
14-Bit
SAR
ADC
14-Bit
SAR
ADC
14-Bit
SAR
ADC
SER/PAR
Interface
Copyright © 2017, Texas Instruments Incorporated
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AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,
intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.
ADS8578S
SBAS825–APRIL2017
ADS8578S14-Bit,High-Speed,8-Channel,Simultaneous-SamplingADCwith
BipolarInputsonaSingleSupply
1
1Features
1
•14-BitADCWithIntegratedAnalogFront-End
•SimultaneousSampling:8Channels
•Pin-ProgrammableBipolarInputs:±10Vand±5V
•HighInputImpedance:1MΩ
•5-VAnalogSupply:2.3-Vto5-VDigitalSupply
•OvervoltageInputClampWith7-kVESD
•Low-Drift,On-ChipReference(2.5V)andBuffer
•ExcellentPerformance:
–200-kSPSMaxThroughputperChannels
–DNL:±0.2LSB;INL:±0.2LSB
–SNR:85.8dB;THD:−109dB
•OvertemperaturePerformance:
–MaxOffsetDrift:3ppm/°C
–GainDrift:6ppm/°C
•On-ChipDigitalFilterforOversampling
•FlexibleParallel,Byte,andSerialInterface
•TemperatureRange:–40°Cto+125°C
•Package:64-PinLQFP
2Applications
•MonitoringandControlforPowerGrids
•ProtectionRelays
•MultiphaseMotorControls
•IndustrialAutomationandControls
•MultichannelDataAcquisitionSystems
3Description
TheADS8578Sdeviceisan8-channel,integrated
dataacquisition(DAQ)systembasedona14-bit
successiveapproximation(SAR)analog-to-digital
converter(ADC).Allinputchannelsare
simultaneouslysampledtoachieveamaximum
throughputof200kSPSperchannel.Thedevice
featuresacompleteanalogfront-endforeach
channel,includingaprogrammablegainamplifier
(PGA)withhighinputimpedanceof1MΩ,input
clamp,low-passfilter,andanADCinputdriver.The
devicealsofeaturesalow-drift,precisionreference
withabuffertodrivetheADC.Aflexibledigital
interfacesupportingserial,parallel,andparallelbyte
communicationenablesthedevicetobeusedwitha
varietyofhostcontrollers.
TheADS8578Scanbeconfiguredtoaccept±10-Vor
±5-Vtruebipolarinputsusingasingle5-Vsupply.
Thehighinputimpedanceallowsdirectconnection
withsensorsandtransformers,thuseliminatingthe
needforexternaldrivercircuits.Thehigh
performanceandaccuracy,alongwithzero-latency
conversionsofferedbythisdevice,alsomakethe
ADS8578Sagreatchoiceformanyindustrial
automationandcontrolapplications.
DeviceInformation
(1)
PARTNUMBERPACKAGEBODYSIZE(NOM)
ADS8578SLQFP(64)10.00mm×10.00mm
(1)Forallavailablepackages,seetheorderableaddendumat
theendofthedatasheet.
2
ADS8578S
SBAS825–APRIL2017
www.ti.com
ProductFolderLinks:ADS8578S
SubmitDocumentationFeedbackCopyright©2017,TexasInstrumentsIncorporated
TableofContents
1Features..................................................................1
2Applications...........................................................1
3Description.............................................................1
4RevisionHistory.....................................................2
5DeviceFamilyComparisonTable........................3
6PinConfigurationandFunctions.........................3
7Specifications.........................................................5
7.1AbsoluteMaximumRatings......................................5
7.2ESDRatings..............................................................6
7.3RecommendedOperatingConditions.......................6
7.4ThermalInformation..................................................6
7.5ElectricalCharacteristics...........................................7
7.6TimingRequirements:CONVSTControl................10
7.7TimingRequirements:DataReadOperation..........10
7.8TimingRequirements:ParallelDataReadOperation,
CSandRDTiedTogether.......................................10
7.9TimingRequirements:ParallelDataReadOperation,
CSandRDSeparate...............................................11
7.10TimingRequirements:SerialDataRead
Operation.................................................................11
7.11TimingRequirements:ByteModeDataRead
Operation.................................................................11
7.12TimingRequirements:OversamplingMode..........11
7.13TimingRequirements:ExitStandbyMode............11
7.14TimingRequirements:ExitShutdownMode.........12
7.15SwitchingCharacteristics:CONVSTControl........12
7.16SwitchingCharacteristics:ParallelDataRead
Operation,CSandRDTiedTogether.....................13
7.17SwitchingCharacteristics:ParallelDataRead
Operation,CSandRDSeparate.............................13
7.18SwitchingCharacteristics:SerialDataRead
Operation.................................................................14
7.19SwitchingCharacteristics:ByteModeDataRead
Operation.................................................................14
7.20TypicalCharacteristics..........................................18
8DetailedDescription............................................25
8.1Overview.................................................................25
8.2FunctionalBlockDiagram.......................................25
8.3FeatureDescription.................................................26
8.4DeviceFunctionalModes........................................34
9ApplicationandImplementation........................47
9.1ApplicationInformation............................................47
9.2TypicalApplication.................................................47
10PowerSupplyRecommendations.....................50
11Layout...................................................................51
11.1LayoutGuidelines.................................................51
11.2LayoutExample....................................................51
12DeviceandDocumentationSupport.................53
12.1DocumentationSupport........................................53
12.2ReceivingNotificationofDocumentationUpdates53
12.3CommunityResources..........................................53
12.4Trademarks...........................................................53
12.5ElectrostaticDischargeCaution............................53
12.6Glossary................................................................53
13Mechanical,Packaging,andOrderable
Information...........................................................53
4RevisionHistory
DATEREVISIONNOTES
April2017*Initialrelease.
64AIN_8GND17DB1
1AVDD48 AVDD
63AIN_8P18DB2
2AGND47 AGND
62AIN_7GND19DB3
3OS046 REFGND
61AIN_7P20DB4
4OS145 REFCAPB
60AIN_6GND21DB5
5OS244 REFCAPA
59AIN_6P22DB6
6PAR/SER/BYTE SEL43 REFGND
58AIN_5GND23DVDD
7STBY42 REFIN/REFOUT
57AIN_5P24DB7/DOUTA
8RANGE41 AGND
56AIN_4GND25DB8/DOUTB
9CONVSTA40 AGND
55AIN_4P26AGND
10CONVSTB39 REGCAP2
54AIN_3GND27DB9
11RESET38 AVDD
53AIN_3P28DB10
12RD/SCLK37 AVDD
52AIN_2GND29DB11
13CS36 REGCAP1
51AIN_2P30DB12
14BUSY35 AGND
50AIN_1GND31DB13
15FRSTDATA34 REFSEL
49AIN_1P32DB14/HBEN
16DB033 DB15/BYTE SEL
Not to scale
3
ADS8578S
www.ti.com
SBAS825–APRIL2017
ProductFolderLinks:ADS8578S
SubmitDocumentationFeedbackCopyright©2017,TexasInstrumentsIncorporated
5DeviceFamilyComparisonTable
PRODUCTRESOLUTION(Bits)CHANNELSSAMPLERATE(kSPS)
ADS8578S148,single-ended200
ADS8588S168,single-ended200
ADS8586S166,single-ended250
ADS8584S164,single-ended330
6PinConfigurationandFunctions
PMPackage
64-PinLQFP
TopView
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | ADS8578S |
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