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规格
ADS8412
SLAS384A–JUNE2003–REVISEDDECEMBER2004
T
一个
=–40
°
Cto85
°
c,+va=5v,+vbd=3vor5v,v
ref
=4.096v,f
样本
=2mhz(unlessotherwisenoted)
PARAMETERTESTCONDITIONSMINTYPMAXUNIT
ANALOGINPUT
全部-scaleinputvoltage
(1)
+in–(–in)–v
ref
V
ref
V
+in–0.2v
ref
+0.2
AbsoluteinputvoltageV
–in–0.2v
ref
+0.2
一般-modeinput
ads8412i(v
ref
/2)–0.2v
ref
/2(v
ref
/2)+0.2v
范围
Inputcapacitance25pF
inputleakagecurrent0.5na
SYSTEMPERFORMANCE
Resolution16Bits
ADS8412I15
NomissingcodesBits
ADS8412IB16
ADS8412I–6
±
46
INLIntegrallinearity
(2)(3)
LSB
ads8412ib–2.5
±
1.52.5
ADS8412I–2
±
13
DNLDifferentiallinearityLSB
ADS8412IB–1
±
0.82
ADS8412I–3
±
13
E
O
Offseterror
(4)
mV
ads8412ib–1.5
±
0.51.5
ads8412i–0.150.15
E
G
Gainerror
(4)(5)
%FS
ads8412ib–0.0980.098
atdc(
±
0.2varoundv
ref
/2)80
cmrrcommon-moderejectionratiodb
+in–(–in)=1v
pp
at1MHz80
Noise60µVRMS
at7fffhoutputcode,
psrrdcpowersupplyrejectionratio+va=4.75vto5.25v,1lsb
vref=4.096v
(4)
SAMPLINGDYNAMICS
Conversiontime340400ns
Acquisitiontime100ns
Throughputrate2MHz
Aperturedelay2ns
Aperturejitter25ps
Stepresponse100ns
Overvoltagerecovery100ns
DYNAMICCHARACTERISTICS
V
在
=8V
pp
at100kHz–95
THDTotalharmonicdistortion
(6)
dB
V
在
=8V
pp
at500kHz–90
snrsignal-至-noiseratiov
在
=8V
pp
at100kHz90
dB
sinadsignal-至-noise+distortionv
在
=8V
pp
at100kHz88
V
在
=8V
pp
at100kHz95
SFDRSpuriousfreedynamicrangedB
V
在
=8V
pp
at500kHz93
–3dBSmallsignalbandwidth5MHz
(1)idealinputspan,doesnotincludegainoroffseterror.
(2)lsbmeansleastsignificantbit
(3)thisisendpointinl,notbestfit
(4)measuredrelativetoanidealfull-scaleinput[+in–(–in)]of8.192v
(5)thisspecificationdoesnotincludetheinternalreferencevoltageerroranddrift.
(6)calculatedonthefirstnineharmonicsoftheinputfrequency
3
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