Texas Instruments ADS7829 Handleiding

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SAR

Control

D

OUT

Comparator

S/H Amp

CS/SHDN

DCLOCK

+In

V

REF

–In

CDAC

Serial

Interface

ADS7826

ADS7827

ADS7829

SLAS388–JUNE2003

10/8/12-BITHIGHSPEED2.7VmicroPOWER™SAMPLING

ANALOG-TO-DIGITALCONVERTER

FEATURESDESCRIPTION

•HighThroughputatLowSupplyVoltage

TheADS7826/27/29isafamilyof10/8/12-bitsampling

(2.7VV

CC

)

analog-to-digitalconverters(A/D)withassuredspecifi-

–ADS7829:12-bit125KSPS

cationsat2.7-Vsupplyvoltage.Itrequiresverylittle

–ADS7826:10-bit200KSPS

powerevenwhenoperatingatthefullsamplerate.At

–ADS7827:8-bit250KSPS

lowerconversionrates,thehighspeedofthedevice

enablesittospendmostofitstimeinthepowerdown

•VeryWideOperatingSupplyVoltageL:

mode—thepowerdissipationislessthan60µWat7.5

2.7Vto5.25V(asLowas2.0VWithReduced

kHz.

Performance)

TheADS7826/27/29alsofeaturesoperationfrom2.0V

•Rail-to-Rail,PseudoDifferentialInput

to5V,asynchronousserialinterface,andadifferential

•WideReferenceVoltage:50mVtoV

CC

input.Thereferencevoltagecanbesettoanylevel

withintherangeof50mVtoV

CC

.

•MicropowerAutoPower-Down:

–LessThan60µWat75kHz,2.7VV

CC

Ultra-lowpowerandsmallpackagesizemakethe

ADS7826/27/29familyidealforbatteryoperatedsys-

•LowPowerDownCurrent:3µAMax

tems.Itisalsoaperfectfitforremotedataacquisition

•UltraSmallChipScalePackage:

modules,simultaneousmultichannelsystems,andiso-

8-pin3x3PDSO(SON,SameSizeasQFN)

lateddataacquisition.TheADS7826/27/29familyis

availableina3x38-pinPDSO(SON,samesizeas

•SPI™CompatibleSerialInterface

QFN)package.

APPLICATIONS

•BatteryOperatedSystems

•RemoteDataAcquisition

•IsolatedDataAcquisition

•SimultaneousSampling,Multichannel

Systems

microPOWERisatrademarkofTexasInstruments.

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexasInstruments

semiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2003,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsofTexasInstruments

standardwarranty.Productionprocessingdoesnotnecessarilyin-

cludetestingofallparameters.

Product specificaties