FEATURESAPPLICATIONS
描述
ADS7886
SLAS492–SEPTEMBER2005
12-位,1-msps,微观的-电源,小型的
saranalog-至-digitalconverters
•
BaseBandConvertersinRadio
•
1-mhzsamplerateserialdevice
交流
•
12-bitresolution
•
motorcurrent/busvoltagesensorsindigital
•
ZeroLatency
驱动
•
20-mhzserialinterface
•
opticalnetworking(dwdm,memsbased
•
supplyrange:2.35vto5.25v
切换)
•
typicalpowerdissipationat1msps:
•
OpticalSensors
•
BatteryPoweredSystems
–3.9mwat3-vv
DD
•
MedicalInstrumentations
–7.5mwat5-vv
DD
•
高-speeddataacquisitionsystems
•
INL
±
1.25lsbmaximum,
±
0.65lsb(典型)
•
高-speedclosed-loopsystems
•
DNL
±
1lsbmaximum,+0.4/-0.65lsb
(典型)
•
typicalacperformance:
72.25dbsinad,-84dbthd
•
unipolarinputrange:0vtov
DD
•
powerdowncurrent:1µa
•
wideinputbandwidth:15mhzat3db
•
6-pinsot23andsc70packages
theads7886isa12-位,1-mspsanalog-至-digitalconverter(模数转换器).thedeviceincludesacapacitorbasedsar
一个/dconverterwithinherentsampleandhold.theserialinterfaceineachdeviceiscontrolledbythecsand
sclksignalsforgluelessconnectionswithmicroprocessorsanddsps.theinputsignalissampledwiththe
fallingedgeofcs,andsclkisusedforconversionandserialdataoutput.
thedeviceoperatesfromawidesupplyrangefrom2.35vto5.25v.thelowpowerconsumptionofthedevice
makesitsuitableforbattery-poweredapplications.thedevicealsoincludesapowerdownfeatureforpower
savingatlowerconversionspeeds.
ThehighlevelofthedigitalinputtothedeviceisnotlimitedtodeviceV
DD
.thismeansthedigitalinputcangoas
highas5.25vwhendevicesupplyis2.35v.thisfeatureisusefulwhendigitalsignalsarecomingfromother
circuitwithdifferentsupplylevels.alsothisrelaxesrestrictiononpowerupsequencing.
theads7886isavailablein6-pinsot23andsc70packagesandisspecifiedforoperationfrom-40°cto
125°c.
微观的-powerminiaturesarconverterfamily
位<300ksps300ksps–1.25msps
12-bitads7866(1.2v
DD
to3.6v
DD
)ads7886(2.35v
DD
to5.25v
DD
)
10-bitads7867(1.2v
DD
to3.6v
DD
)ads7887(2.35v
DD
to5.25v
DD
)
8-bitads7868(1.2v
DD
to3.6v
DD
)ads7888(2.35v
DD
to5.25v
DD
)
pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
productiondatainformationiscurrentasofpublicationdate.
copyright©2005,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
necessarilyincludetestingofallparameters.
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