www.德州仪器.com
ELECTRICALCHARACTERISTICS
ADS8509
SLAS324A–OCTOBER2004–REVISEDJUNE2005
AtT
一个
=-40°cto85°c,f
s
=250khz,v
DIG
=V
ANA
=5v,usinginternalreferenceand0.1%,0.25wfixedresistors(看
Figure29和Figure30)(unlessotherwisespecified)
ADS8509IADS8509IB
PARAMETERTESTCONDITIONSUNIT
MINTYPMAXMINTYPMAX
Resolution1616Bits
ANALOGINPUT
Voltageranges
(1)
阻抗
(1)
Capacitance5050pF
THROUGHPUTSPEED
ConversioncycleAcquireandconvert44µs
Throughputrate250250kHz
DCACCURACY
inlintegrallinearityerror-33-22lsb
(2)
dnldifferentiallinearityerror-22-11lsb
Nomissingcodes1516Bits
Transitionnoise
(3)
11LSB
±10vrangeint.ref.with0.1%external-0.50.5-0.50.5
全部-规模
%FSR
fixedresistors
错误
(4)(5)
allotherranges-0.50.5-0.50.5
全部-scaleerrordriftint.ref.±7±7ppm/°c
±10vrangeext.ref.with0.1%external-0.50.5-0.50.5
全部-规模
%FSR
fixedresistors
错误
(4)(5)
allotherranges-0.50.5-0.50.5
全部-scaleerrordriftext.ref.±2±2ppm/°c
Bipolarzeroerror
(4)
-1010-55mv
bipolarzeroerrordrift±0.4±0.4ppm/°c
10vrange-55-55
Unipolarzero
mV
4vand5v-33-33
错误
(4)
范围
unipolarzeroerrordrift±2±2ppm/°c
recoverytoratedaccuracyafter1-µfcapacitortocap11ms
powerdown
powersupplysensitivity-88-88
+4.75v<v
D
<+5.25vlsb
(v
DIG
=V
ANA
=V
D
)
ACACCURACY
sfdrspurious-freedynamicrangef
I
=20kHz90999599dB
(6)
THDTotalharmonicdistortionf
I
=20khz-98-90-98-93db
SINADf
I
=20kHz83888588dB
信号-至-(noise+distortion)
–60-dbinput3032db
snrsignal-至-noiseratiof
I
=20kHz83888688dB
全部-powerbandwidth
(7)
500500kHz
SAMPLINGDYNAMICS
Aperturedelay55ns
TransientresponseFSStep22µs
Overvoltagerecovery
(8)
150150ns
(1)±10v,0vto5v,等.(看Table3)
(2)lsbmeansleastsignificantbit.forthe±10-vinputrange,onelsbis305µv.
(3)typicalrmsnoiseatworstcasetransitionsandtemperatures.
(4)asmeasuredwithfixedresistorsshowninFigure29和Figure30.adjustabletozerowithexternalpotentiometer.factorycalibrated
with0.1%,0.25wresistors.
(5)forbipolarinputranges,全部-scaleerroristheworstcaseof-全部-scaleor+full-scaleuncalibrateddeviationfromidealfirstandlastcode
transitions,dividedbythetransitionvoltage(notdividedbythefull-scalerange)andincludestheeffectofoffseterror.forunipolarinput
范围,全部-scaleerroristhedeviationofthelastcodetransitiondividedbythetransitionvoltage.italsoincludestheeffectofoffset
错误.
(6)allspecificationsindbarereferredtoafull-scale±10-vinput.
(7)全部-powerbandwidthisdefinedasthefull-scaleinputfrequencyatwhichsignal-至-(noise+distortion)degradesto60db.
(8)recoverstospecifiedperformanceafter2xfsinputovervoltage.
3
: 点此下载
