Texas Instruments ADS7882 Handleiding

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1

FEATURES

DESCRIPTION

APPLICATIONS

_

+

SAR

Output

Latches

and

3-State

Drivers

BYTE

12/8-Bit Parallel

Data Output Bus

Conversion

and

Control Logic

CONVST

BUSY

CS

RD

A_PWDPWD/RST

CDAC

Comparator

CLOCK

2.5 V

Internal

Reference

+IN

−IN

REFIN

REFOUT

ADS7882

www.ti.com

...........................................................................................................................................................................................SLAS630–DECEMBER2008

12-BIT,3-MSPS

LOWPOWERSARANALOG-TO-DIGITALCONVERTER

•3-MHzSampleRate,12-BitResolution

•ZeroLatency

TheADS7882isa12-bit3-MSPSA-to-Dconverter

with2.5-Vinternalreference.Thedeviceincludesa

•Unipolar,PseudoDifferentialInput,Range:

capacitorbasedSARA/Dconverterwithinherent

–0Vto2.5V

sampleandhold.Thedeviceoffersa12-bitparallel

•High-SpeedParallelInterface

interfacewithanadditionalbytemodethatprovides

easyinterfacewith8-bitprocessors.Thedevicehas

•69.5dBSNRat100kHzI/P

apseudo-differentialinputstage.

•PowerDissipation85mWat3MSPS

The–INswingof±200mVisusefultocompensate

•NapMode(10mWPowerDissipation)

forgroundvoltagemismatchbetweentheADCand

•PowerDown(10µW)

sensorandalsotocancelcommon-modenoise.With

•InternalReference

napmodeenabled,thedeviceoperatesatlower

powerwhenusedatlowerconversionrates.The

•InternalReferenceBuffer

deviceisavailablein48-pinTQFPpackage.

•48-PinTQFPPackage

•OpticalNetworking(DWDM,MEMSBased

Switching)

•SpectrumAnalyzers

•HighSpeedDataAcquisitionSystems

•HighSpeedClose-LoopSystems

•Telecommunication

•Ultra-SoundDetection

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Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexas

Instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2008,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Product specificaties