Texas Instruments ADS1226 Handleiding
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ADS1225
¨
¨
ADS1226
1
FEATURESDESCRIPTION
APPLICATIONS
MUX
SerialInterface
DS
ADC
VREFPVREFN
Buffer
AVDDDVDD
GNDMUX
ADS1226Only
AINP1
AINN1
AINP2
AINN2
DRDY/DOUT
SCLK
TEMPEN
START
Oscillator
MODE
BUFEN
ADS1225
ADS1226
www.ti.com
.......................................................................................................................................................SBAS346C–MAY2006–REVISEDJANUARY2009
24-BitAnalog-to-DigitalConverter
withOne-andTwo-ChannelDifferentialInputsandInternalOscillator
2
•100SPSDataRate(High-SpeedMode)
TheADS1225andADS1226are24-bitdelta-sigma
analog-to-digital(A/D)converters.Theyoffer
•Single-CycleSettling
excellentperformance,ease-of-use,andlowpowerin
•EasyConversionControlwithSTARTPin
asmall4mm×4mmQFNpackageandare
•AutomaticShutdown
well-suitedfordemandinghigh-resolution
•LowNoise:4µV
RMS
Noise(High-Resolutionmeasurements,especiallyinportableandother
space-savingandpower-constrainedapplications.
Mode)
•InputMultiplexerwithTwoDifferential
TheADS1225andADS1226convertoncommand
Channels(ADS1226)
usingadedicatedSTARTpin.Simplypulsethispinto
initiateaconversion.Dataisreadinasinglecyclefor
•VoltageReferenceSupportsRatiometric
retrievalovera2-wireserialinterfacethateasily
Measurements
connectstopopularmicrocontrollerslikethe
•Self-Calibrating
MSP430.Aftertheconversioncompletes,the
•SimpleRead-Only2-WireSerialInterface
ADS1225andADS1226automaticallyshutsdownall
circuitry.
•InternalHigh-ImpedanceInputBuffer
Internalfeaturesincludeatwo-channelmultiplexer
•InternalTemperatureSensor
(ADS1226),selectableinputbuffer,temperature
•InternalOscillator
sensor,andoscillator.Thefull-scalerangeisdefined
•Low-Power:1mWWhileOperating,<1µA
bytheexternalvoltagereferencewithsupport
DuringShutdown
providedforuptoa5Vdifferentialinputsignal.Two
operatingmodesallowforspeed(100SPSdatarate,
•AnalogandDigitalSupplies:2.7Vto5.5V
15µV
RMS
noise)orresolution(4µV
RMS
noise,16SPS
datarate).
•Hand-HeldInstrumentation
TheADS1225/6supports2.7to5.5Vanalogand
digitalsupplies.Powerconsumptionis1mWwhile
•PortableMedicalEquipment
convertingwith3Vsupplies.TheADS1225and
•IndustrialProcessControl
ADS1226arefullyspecifiedoveranextended
industrialtemperaturerangeof–40°Cto+105°C.
1
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexas
Instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
2Alltrademarksarethepropertyoftheirrespectiveowners.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.
Copyright©2006–2009,TexasInstrumentsIncorporated
ProductsconformtospecificationsperthetermsoftheTexas
Instrumentsstandardwarranty.Productionprocessingdoesnot
necessarilyincludetestingofallparameters.
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | ADS1226 |
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