特点
应用程序
描述
_
+
CDAC
sar
换算
和
控制
逻辑
比较器
12/10/8 有点 adc
VIN
参考/v
dd
cs
SCLK
SDO
地
s/h
ADS7866
ADS7867
ADS7868
SLAS465–JUNE2005
1.2-v,12-/10-/8-有点,200-ksps/100-ksps,微电源,微型
模拟-至-digitalconverterwithserialinterface
thesampling,换算,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)
微型-processorsordspsthroughahigh-speedspi
•
71dbsnr,–83dbthdatf
入点
=30kHz
compatibleserialinterface.therearenopipeline
delaysassociatedwiththedevice.
(ads7866)
•
SynchronizedConversionwithSCLK
Theminimumconversiontimeisdeterminedbythe
frequencyoftheserialclockinput,sclk,whilethe
•
SPICompatibleSerialInterface
maximumfrequencyofSCLKisdeterminedbythe
•
NoPipelineDelays
minimumsamplingtimerequiredtochargetheinput
•
低功耗
capacitanceto12/10/8-bitaccuracyforthe
ads7866/67/68,分别.themaximum
–1.39mwtypat200ksps,v
dd
=3.6v
throughputisdeterminedbyhowoftenaconversion
–0.39mwtypat200ksps,v
dd
=1.6v
isinitiatedwhentheminimumsamplingtimeismet
–0.22mwtypat100ksps,v
dd
=1.2v
andthemaximumsclkfrequencyisused.每个
•
autopower-向下:8natyp,300namax
deviceautomaticallypowersdownaftereachconver-
锡宁,whichallowseachdevicetosavepowerwhen
•
0VtoV
dd
UnipolarInputRange
thethroughputisreducedwhileusingthemaximum
•
6-pinsot-23package
sclkfrequency.
Theconverterreferenceistakeninternallyfromthe
供应.因此,theanaloginputrangeforthese
•
BatteryPoweredSystems
devicesis0VtoV
dd
.
•
IsolatedDataAcquisition
thesedevicesareavailableina6-pinsot-23
•
MedicalInstruments
packageandarecharacterizedovertheindustrial
•
PortableCommunication
–40
°
Cto85
°
ctemperaturerange.
•
PortableDataAcquisitionSystems
•
AutomaticTestEquipment
theads7866/67/68arelowpower,微型,
12/10/8-bita/dconverterseachwithaunipolar,
单独-endedinput.thesedevicescanoperatefroma
single1.6vto3.6vsupplywitha200-ksps
throughputforads7866.inaddition,thesedevices
canmaintainatleasta100-kspsthroughputwitha
supplyaslowas1.2v.
微型-powerminiaturesarconverterfamily
分辨率/速度&指示灯;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,标准保修,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
productiondatainformationiscurrentasofpublicationdate.
copyright©2005,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
必要包括测试所有参数.
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