Texas Instruments ADS8028 Handleiding

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Buffer

Internal

Reference

Internal

Temperature

Sensor

REF

DGND

AIN0

AIN1

AIN2

AIN3

AIN4

AIN5

AIN6

AIN7

Control

Logic

and

Sequencer

SCLK

DOUT

DIN

CS

PDRST/

TM_BUSY

ADC

SH

DVDDAVDD

ADS8028

www.ti.com

SBAS549B–MAY2011–REVISEDMARCH2012

12-Bit,1-MSPS,8-Channel,SARADC

withInternalReferenceandInternalTemperatureSensor

CheckforSamples:ADS8028

1

FEATURES

DESCRIPTION

TheADS8028isa12-bitanalog-to-digitalconverter

23

•OutstandingPerformance:

(ADC),capableofoperatingatsamplingspeedsupto

–Throughput:Upto1MSPS

1MSPS.Thedeviceisbasedonasuccessive

–NoMissingCodes:12Bits

approximationregister(SAR)coreandprovidesan

inherentsample-and-hold(SH)front-end.

–INL:±0.5LSB

–SNR:72dB

Inadditiontohavingeightanaloginputchannels,the

ADS8028offersaninternaltemperaturesensorwith

•HighlyIntegrated:

0.25°Cresolutionandaninternalvoltagereference.A

–EightAnalogInputs

nine-channelinternalmultiplexerenablesmultiple

–High-ResolutionInternalTemperature

channelstobeselected(includingtheinternal

Sensor

temperaturesensor)thatareindefinitelyscannedina

sequentialmanner.AsimpleSPI-compatibleserial

–Nine-ChannelMultiplexerwithChannel

interfaceprovideseasycommunicationandcontrol

Sequencer

betweenthedeviceandhostcontroller.Thedigital

–Low-DriftInternalVoltageReference

supplycanoperatefrom1.65Vto5.25V,enabling

•WideSupplyRange:

directinterfacewithawiderangeofprocessorsand

controllers.

–AnalogSupply(AVDD):2.7Vto5.25V

Atfullspeedof1MSPS,theADS8028dissipates

–DigitalSupply(DVDD):1.65Vto5.25V

only17mW.Thedeviceoffersflexiblepower-down

•LowPower:

modestosavepowerwhenconversionsarenot

–17mWat1MSPS

beingperformed.TheADS8028performanceis

–FlexiblePower-DownModes

specifiedovertheextendedindustrialtemperature

rangeof–40°Cto+125°C.

•SPI™-CompatibleSerialInterface:20MHz

TheADS8028isidealfordemandingmeasurement

•SmallFootprint:4-mm×4-mm,ThinQFN-20

applications,suchassensoroutputmonitoring,

power-supplymonitoring,andprintedcircuitboard

APPLICATIONS

(PCB)hot-spotanalysis,andisavailableinasmall

•ProgrammableLogicControls(PLCs)

form-factorQFN-20package.

•IndustrialProcessControls(IPCs)

•Telecommunications

•Power-SupplyMonitoring

•PCBHot-SpotAnalysis

•Battery-PoweredApplications

1

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2SPIisatrademarkofMotorola.

3Allothertrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2011–2012,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Product specificaties