Texas Instruments ADS1274 Handleiding
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VREFPVREFNAVDDDVDD
TEST[1:0]
FORMAT[2:0]
CLK
SYNC
PWDN[8:1]
CLKDIV
Control
Logic
SPI
and
Frame-
Sync
Interface
IOVDD
DGNDAGND
DRDY/FSYNC
SCLK
DOUT[8:1]
DIN
Input2
Input1
Input4
Input3
Input6
Input5
Input8
Input7
DS
DS
DS
DS
DS
DS
DS
DS
PWDN[4:1]
ADS1278
Four
Digital
Filters
AVDDDVDD
TEST[1:0]
FORMAT[2:0]
CLK
SYNC
CLKDIV
Control
Logic
SPI
and
Frame-
Sync
Interface
IOVDD
DGNDAGND
DRDY/FSYNC
SCLK
DOUT[4:1]
DIN
ADS1274
MODE[1:0]
MODE[1:0]
Eight
Digital
Filters
VREFPVREFN
Input2
Input1
Input4
Input3
DS
DS
DS
DS
ADS1274
ADS1278
www.ti.com
SBAS367F–JUNE2007–REVISEDFEBRUARY2011
Quad/Octal,SimultaneousSampling,24-BitAnalog-to-DigitalConverters
CheckforSamples:ADS1274,ADS1278
1
FEATURES
DESCRIPTION
234
•SimultaneouslyMeasureFour/EightChannels
Basedonthesingle-channelADS1271,theADS1274
(quad)andADS1278(octal)are24-bit,delta-sigma
•Upto144kSPSDataRate
(ΔΣ)analog-to-digitalconverters(ADCs)withdata
•ACPerformance:
ratesupto144ksamplespersecond(SPS),allowing
70kHzBandwidth
simultaneoussamplingoffouroreightchannels.The
111dBSNR(High-ResolutionMode)
devicesareofferedinidenticalpackages,permitting
–108dBTHD
drop-inexpandability.
•DCAccuracy:
Traditionally,industrialdelta-sigmaADCsoffering
0.8μV/°COffsetDrift
gooddriftperformanceusedigitalfilterswithlarge
1.3ppm/°CGainDrift
passbanddroop.Asaresult,theyhavelimitedsignal
•SelectableOperatingModes:
bandwidthandaremostlysuitedfordc
High-Speed:144kSPS,106dBSNRmeasurements.High-resolutionADCsinaudio
applicationsofferlargerusablebandwidths,butthe
High-Resolution:52kSPS,111dBSNR
offsetanddriftspecificationsaresignificantlyweaker
Low-Power:52kSPS,31mW/ch
thanrespectiveindustrialcounterparts.TheADS1274
Low-Speed:10kSPS,7mW/ch
andADS1278combinethesetypesofconverters,
•LinearPhaseDigitalFilter
allowinghigh-precisionindustrialmeasurementwith
•SPI™orFrame-SyncSerialInterface
excellentdcandacspecifications.
•LowSamplingApertureError
Thehigh-order,chopper-stabilizedmodulator
•ModulatorOutputOption(digitalfilterbypass)
achievesverylowdriftwithlowin-bandnoise.The
onboarddecimationfiltersuppressesmodulatorand
•AnalogSupply:5V
signalout-of-bandnoise.TheseADCsprovidea
•DigitalCore:1.8V
usablesignalbandwidthupto90%oftheNyquist
•I/OSupply:1.8Vto3.3V
ratewithlessthan0.005dBofripple.
Fouroperatingmodesallowforoptimizationofspeed,
APPLICATIONS
resolution,andpower.Alloperationsarecontrolled
•Vibration/ModalAnalysis
directlybypins;therearenoregisterstoprogram.
•Multi-ChannelDataAcquisition
Thedevicesarefullyspecifiedovertheextended
industrialrange(–40°Cto+105°C)andareavailable
•Acoustics/DynamicStrainGauges
inanHTQFP-64PowerPAD™package.
•PressureSensors
1
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexas
Instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
2PowerPADisatrademarkofTexasInstruments,Inc.
3SPIisatrademarkofMotorola,Inc.
4Allothertrademarksarethepropertyoftheirrespectiveowners.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.
©2007–2011,TexasInstrumentsIncorporated
ProductsconformtospecificationsperthetermsoftheTexas
Instrumentsstandardwarranty.Productionprocessingdoesnot
necessarilyincludetestingofallparameters.
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | ADS1274 |
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