Texas Instruments ADS7864 Handleiding

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FEATURESDESCRIPTION

APPLICATIONS

SAR

Interface

Conversion

and

Control

FIFO

Registers

COMP

CS

CLOCK

BYTE

A0

Channel/

DataOutput

16

RESET

BUSY

RD

A1

A2

CDAC

Internal

2.5V

Reference

CHA0−

CHA0+

CHB0−

CHB0+

HOLDA

HOLDB

HOLDC

REF

IN

CHC1−

CHC1+

SAR

COMP

CDAC

MUX

MUX

CHA1−

CHA1+

CHB1−

CHB1+

S/H

Amp

S/H

Amp

S/H

Amp

S/H

Amp

S/H

Amp

S/H

Amp

CHC1−

CHC1+

REF

OUT

ADS7864

SBAS141A–SEPTEMBER2000–REVISEDMARCH2005

500kHz,12-Bit,6-ChannelSimultaneousSampling

ANALOG-TO-DIGITALCONVERTER

•6SimultaneousSamplingChannels

TheADS7864isadual12-bit,500kHz

analog-to-digital(A/D)converterwith6fullydifferen-

•FullyDifferentialInputs

tialinputchannelsgroupedintothreepairsforhigh

•2µsTotalThroughputperChannel

speedsimultaneoussignalacquisition.Inputstothe

•NoMissingCodes

sample-and-holdamplifiersarefullydifferentialand

•ParallelInterfacearemaintaineddifferentialtotheinputoftheA/D

converter.Thisprovidesexcellentcommon-modere-

•1MHzEffectiveSamplingRate

jectionof80dBat50kHzwhichisimportantinhigh

•LowPower:50mW

noiseenvironments.

•6XFIFO

TheADS7864offersaparallelinterfaceandcontrol

inputstominimizesoftwareoverhead.Theoutput

dataforeachchannelisavailableasa16-bitword

•MotorControl

(addressanddata).TheADS7864isofferedina

•Multi-AxisPositioningSystemsTQFP-48packageandisfullyspecifiedoverthe

–40°Cto+85°Coperatingrange.

•3-PhasePowerControl

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexas

Instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2000–2005,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Product specificaties