Texas Instruments ADS8509 Handleiding

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Successive Approximation Register

Clock

Comparator

CS

CDAC

Buffer

REF

CAP

R1

IN

10 kΩ

4.9 kΩ

Internal

+2.5 V Ref

4 kΩ

Serial

Data

Out

&

Control

BUSY

DATACLK

DATA

2.5 kΩ

9.8 kΩ

R2

IN

R3

IN

EXT/INT

R/C

SB/BTC

PWRD

ADS8509

www.ti.com

SLAS324C–OCTOBER2004–REVISEDAPRIL2010

16-BIT250-KSPSSERIALCMOSSAMPLINGANALOG-TO-DIGITALCONVERTER

CheckforSamples:ADS8509

1

FEATURES

DESCRIPTION

2

•250-kHzSamplingRate

TheADS8509isacomplete16-bitsampling

analog-to-digital(A/D)converterusingstate-of-the-art

•4-V,5-V,10-V,±3.33-V,±5-V,and±10-VInput

CMOSstructures.Itcontainsacomplete16-bit,

Ranges

capacitor-based,successiveapproximationregister

•±2LSBMaxINL

(SAR)A/Dconverterwithsample-and-hold,

•±1LSBMaxDNL,16-BitNoMissingCodes

reference,clock,andaserialdatainterface.Datacan

beoutputusingtheinternalclockorcanbe

•SPICompatibleSerialOutputwithDaisy-Chain

synchronizedtoanexternaldataclock.TheADS8509

(TAG)Feature

alsoprovidesanoutputsynchronizationpulsefor

•Single5-VSupply

easeofusewithstandardDSPprocessors.

•Pin-CompatiblewithADS7809(LowSpeed)

TheADS8509isspecifiedata250-kHzsamplingrate

and12-BitADS8508/7808

overthefulltemperaturerange.Precisionresistors

•UsesInternalorExternalReference

providevariousinputrangesincluding±10Vand0V

•70-mWTypPowerDissipationat250KSPS

to5V,whiletheinnovativedesignallowsoperation

fromasingle+5-Vsupplywithpowerdissipation

•20-PinSOand28-PinSSOPPackages

under100mW.

•SimpleDSPInterface

TheADS8509isavailablein20-pinSOand28-pin

SSOPpackages,bothfullyspecifiedforoperation

APPLICATIONS

overtheindustrial-40°Cto85°Ctemperaturerange.

•IndustrialProcessControl

•DataAcquisitionSystems

•DigitalSignalProcessing

•MedicalEquipment

•Instrumentation

1

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexas

Instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2004–2010,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Product specificaties