特性
产品
描述
_
+
CDAC
SAR
转换
和
控制
逻辑
比较器
12/10/8 位 模数转换器
VIN
ref/v
DD
CS
SCLK
SDO
地
s/h
ADS7866
ADS7867
ADS7868
SLAS465–JUNE2005
1.2-v,12-/10-/8-位,200-ksps/100-ksps,微观的-电源,小型的
相似物-至-digitalconverterwithserialinterface
thesampling,转换,andactivationofdigital
outputsdoareinitiatedonthefallingedgeofcs.
•
single1.2-vto3.6-vsupplyoperation
TheserialclockSCLKisusedforcontrollingthe
•
HighThroughput
conversionrateandshiftingdataoutoftheconverter.
此外,sclkprovidesamechanismtoallow
–200/240/280kspsfor12/10/8-bitv
DD
≥
1.6v
digitalhostprocessorstosynchronizewiththecon-
–100/120/140kspsfor12/10/8-bitv
DD
≥
1.2v
verter.theseconvertersinterfacewith
•±
1.5lsbinl,12-bitnmc(ads7866)
微观的-processorsordspsthroughahigh-speedspi
•
71dbsnr,–83dbthdatf
在
=30kHz
compatibleserialinterface.therearenopipeline
delaysassociatedwiththedevice.
(ads7866)
•
SynchronizedConversionwithSCLK
Theminimumconversiontimeisdeterminedbythe
frequencyoftheserialclockinput,sclk,whilethe
•
SPICompatibleSerialInterface
maximumfrequencyofSCLKisdeterminedbythe
•
NoPipelineDelays
minimumsamplingtimerequiredtochargetheinput
•
LowPower
capacitanceto12/10/8-bitaccuracyforthe
ads7866/67/68,各自.themaximum
–1.39mwtypat200ksps,v
DD
=3.6v
throughputisdeterminedbyhowoftenaconversion
–0.39mwtypat200ksps,v
DD
=1.6v
isinitiatedwhentheminimumsamplingtimeismet
–0.22mwtypat100ksps,v
DD
=1.2v
andthemaximumsclkfrequencyisused.各自
•
autopower-向下:8natyp,300namax
deviceautomaticallypowersdownaftereachconver-
sion,whichallowseachdevicetosavepowerwhen
•
0VtoV
DD
UnipolarInputRange
thethroughputisreducedwhileusingthemaximum
•
6-pinsot-23package
sclkfrequency.
Theconverterreferenceistakeninternallyfromthe
供应.hence,theanaloginputrangeforthese
•
BatteryPoweredSystems
devicesis0VtoV
DD
.
•
IsolatedDataAcquisition
thesedevicesareavailableina6-pinsot-23
•
MedicalInstruments
packageandarecharacterizedovertheindustrial
•
PortableCommunication
–40
°
Cto85
°
ctemperaturerange.
•
PortableDataAcquisitionSystems
•
AutomaticTestEquipment
theads7866/67/68arelowpower,小型的,
12/10/8-bita/dconverterseachwithaunipolar,
单独的-endedinput.thesedevicescanoperatefroma
single1.6vto3.6vsupplywitha200-ksps
throughputforads7866.inaddition,thesedevices
canmaintainatleasta100-kspsthroughputwitha
supplyaslowas1.2v.
微观的-powerminiaturesarconverterfamily
决议/速<200ksps1msps–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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