www.德州仪器.com
FEATURESDESCRIPTION
产品
24−Bit
模数转换器
数字的
过滤
内部的
Monitoring
16:1
相似物
输入
MUX
1
16
AINCOM
…
模数转换器
在
Extclk
在/输出
AVSS DGND
AVDD DVDD
M UX
输出
SPI
接口
CS
DRDY
SCLK
DIN
DOUT
ControlOscillator
GPIO
ST艺术
重置
PWDN
GPIO[7:0]v
REF
ADS1258
相似物 输入
ADS1258
SBAS297A–JUNE2005–REVISEDSEPTEMBER2005
16-频道,24-bitanalog-至-digitalconverter
•
24bits,nomissingcodes
theads1258isa16-频道(多路复用),
低-噪音,24-位,delta-sigma(
∆Σ
)相似物-至-数字的
•
fixed-channelorautomaticchannelscan
转换器(模数转换器)thatprovidessingle-cyclesettled
•
fixed-channeldatarate:125ksps
dataatchannelscanratesfrom1.8kto23.7k
•
自动-scandatarate:23.7ksps
samplespersecond(sps).aflexibleinput
•
单独的-conversionsettleddata
multiplexeracceptscombinationsofeightdifferential
or16single-endedinputswithafull-scaledifferential
•
16single-endedor8differentialinputs
rangeof5Vortruebipolarrangeof
±
2.5vwhen
•
单极的(+5v)orbipolar(
±
2.5v)运作
operatingwitha5vreference.thefourth-顺序
•
lownoise:2.8µv
RMS
at1.8ksps
delta-sigmamodulatorisfollowedbyafifth-ordersinc
digitalfilteroptimizedforlow-noiseperformance.
•
0.0003%integralnonlinearity
•
dcstability(典型):
Thedifferentialoutputofthemultiplexerisaccessible
toallowsignalconditioningpriortotheinputofthe
0.02µv/
°
coffsetdrift,0.4ppm/
°
CGainDrift
模数转换器.internalsystemmonitorregistersprovide
•
打开-sensordetection
supplyvoltage,温度,referencevoltage,增益,
•
conversioncontrol(pinandcommands)
andoffsetdata.
•
MultiplexerOutputforExternalSignal
AnonboardPLLgeneratesthesystemclockfroma
Conditioning
32.768khzcrystal,orcanbeoverriddenbyan
•
在-chiptemperature,涉及,补偿,
externalclocksource.abufferedsystemclockoutput
增益,andsupplyvoltagereadback
(15.7mhz)isprovidedtodriveamicrocontrolleror
additionalconverters.
•
42mWPowerDissipation
Serialdigitalcommunicationishandledviaan
•
备用物品,睡眠,andpower-downmodes
spi™-compatibleinterface.asimplecommandword
•
8general-purposeinputs/输出(gpio)
structurecontrolschannelconfiguration,datarates,
•
32.768khzcrystaloscillatororexternalclock
digitali/o,monitorfunctions,等
Programmablesensorbiascurrentsourcescanbe
usedtobiassensorsorverifysensorintegrity.
•
medical,avionics,andprocesscontrol
TheADS1258operatesfromaunipolar+5Vor
•
MachineandSystemMonitoring
双极
±
2.5vanalogsupplyandadigitalsupply
•
fastscanmulti-channelinstrumentation
compatiblewithinterfacesrangingfrom2.7vto
•
IndustrialProcessControls
5.25v.theads1258isavailableinaqfn-48
•
TestandMeasurementSystems
包装.
pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
spiisatrademarkofmotorola,公司
alltrademarksarethepropertyoftheirrespectiveowners.
productiondatainformationiscurrentasofpublicationdate.
copyright©2005,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
necessarilyincludetestingofallparameters.
: 点此下载
