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PINCONFIGURATION
3
2
4
6
(t运算 视图)
1
ref/v
DD
地
VIN
SCLK
ads7866/67/68
dbv pACKAGE
CS
5
SDO
ADS7866
ADS7867
ADS7868
SLAS465–JUNE2005
TERMINALFUNCTIONS
终端
描述
nameno.
ref/v
DD
1Externalreferenceinputandpowersupply
gnd2groundforsignalandpowersupply.allanaloganddigitalsignalsarereferredwithrespecttothispin.
VIN3Analogsignalinput
sclk4serialclockinput.thisclockisusedforclockingdataout,anditisthesourceofconversionclock.
thisistheserialdataoutputoftheconversionresult.theserialstreamcomeswithmsbfirst.themsbisclockedout
(changed)onthefallingedgeonesclkafterthesamplingperiodends.thisresultsinfourleadingzerosaftercs
SDO5
becomesactive.sdois3-statedonceallthevalidbitsareclockedout(12forads7866,10forads7867,and8for
ads7868).
thisisanactivelowinputsignal.itisusedasachipselecttogatethesclkinput,toinitiateaconversion,andto
CS6
frameoutputdata.
10
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