产品 预告(展)
FEATURESDESCRIPTION
产品
输入
Mux
∆Σ
模数转换器
REFP REFN
PGA
一个 = 1, 2, 64,
128
CAP DVDD
DGND
agnda1/温度
(1)
A0
便条: (1) A1 为 ads1234, 温度 为 ads1232.
AINP1
AINN1
AINP2
AINN2
AINP3
AINN3
AINP4
AINN4
ADS1234
仅有的
SCLK
速
drdy/dout
PDWN
增益 [1:0]
AVDD
CAP
外部 振荡器
内部的 振荡器
xtal1/clkin XTAL2
ADS1232
ADS1234
SBAS350–JUNE2005
ultralow-噪音,24-bitanalog-至-digitalconverter
•
upto23.5effectivebits
TheADS1232andADS1234areprecision
相似物-至-数字的(一个/d)convertersfeaturingtrue23.5
•
rmsnoise:
有效的-bitperformanceandexceptionaleaseof
–17nVat10Hz
使用.selectablegainsof1,2,64,or128allow
–44nVat80Hz
全部-scaledifferentialinputrangesof
±
2.5vto
•
在-boardlownoisegain-放大
±
19.5mvwitha+5vreference.whiletheads1232
offersatwo-channeldifferentialinputandabuilt-在
•
19.2-bitnoise-freeresolutionatgain=64
temperaturesensor,theads1234featuresa
•
simultaneous50hzand60hzrejection:
四-channeldifferentialinputmultiplexer.avery
–internalclock:110db
低-noisegain-ampfeatureslowdifferentialinput
currenttominimizeerrorswhenusing
–externalclock:130db
高-impedancetransducers.anon-boardoscillator
•±
1%low-drifton-boardoscillator
isprovidedforexcellent50Hzand60Hzrejection
•
selectablegainsof1,2,64,and128
withoutanexternalclocksource.thedevicesalso
featurealowcurrentdrivertoaccommodatean
•
selectable10/80spsconversionrates
externalcrystal;theyalsoacceptexternalclock
•
2-channeldifferentialinputwithbuilt-intemp
sourcesforallapplications.
传感器(ads1232)
allofthefeaturesoftheads1232/ads1234are
•
4-channeldifferentialinput(ads1234)
hard-wireselected,withoutsoftwareprogramming.
•
ExternalReferenceuptoAVDD
Dataisaccessedoverasimpleserialinterface
•
SimpleSerialDigitalInterface
compatiblewithpopularmicrocontrollerssuchasthe
msp430.theads1232isavailableinthe24-管脚
•
supplyrange:2.7vto5.3v
tssoppackage,andtheads1234isavailablein
•
–40
°
Cto+105
°
CTemperatureRange
the28-pintssop.
•
WeighScales
•
StrainGauges
•
BridgeSensors
•
IndustrialProcessControl
pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
productpreviewinformationconcernsproductsintheforma-
copyright©2005,texasinstrumentsincorporated
tiveordesignphaseofdevelopment.characteristicdataandother
specificationsaredesigngoals.texasinstrumentsreservesthe
righttochangeordiscontinuetheseproductswithoutnotice.
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