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electricalcharacteristics:+5v
AMC7823
SLAS453A–APRIL2005–REVISEDOCTOBER2005
at–40°cto+85°c,av
DD
=5v,dv
DD
=5v,bv
DD
=3vto5v,usingexternal2.5-vreference(unlessotherwisenoted).
AMC7823
PARAMETERCONDITIONSMINTYPMAXUNITS
ADCANALOGINPUTS
Inputvoltagerange02×V
REF
V
Inputimpedance5M
Ω
Inputcapacitance15pF
Inputleakagecurrent±1µA
相似物-至-digitalconverter
Resolution12Bits
Nomissingcodes12Bits
Integrallinearity±1LSB
(1)
Differentiallinearity±1LSB
Offseterror±2LSB
offseterrordrift±4ppmfs/°c
offseterrormatch0.51lsb
Gainerror±6LSB
gainerrormatch0.31lsb
Noise70µV
RMS
电源-supplyrejectionav
DD
=5V±5%70dB
Throughputrate200kHz
TotalconversiontimeScanChannels0through745
µ
s
TotalconversiontimeincludingtemperatureScanChannels0through856
µ
s
频道-至-channelisolationv
在
=5V
PP
at10khz0.5lsb
数字的-至-analogconverter
(2)
OutputvoltagerangeProgrammable02×V
REF
V
OutputcurrentRefertoTypicalCharacteristics±1mA
Resolution12Bits
Integrallinearity
(3)
±2±8LSB
Monotonicity12Bits
differentiallinearity±0.2±1lsb
Outputrange=0toV
REF
±0.5±5mv
Offseterror
Outputrange=0to2xV
REF
±1±10mV
offseterrordrift±4ppmfs/°c
GainerrorOutputrange=0to2xV
REF
±0.3±1.0%fs
stepbetweencode0x400to0xc00,
Settlingtime2
µ
s
to±1LSB
codechangeglitch1lsbchange,inworstcase20nv-s
OvershootStepbetweencode0x400to0xC00200mV
crosstalkstepbetweencode0x400to0xc00<0.5lsb
sinewave(1khz,5v
PP
)generatedby
信号-至-noiseratiodac,samplingat400ksps,74db
R
L
=10k
Ω
,c
L
=100pf.
outputbuffergain=260nv/
√
Hz
Outputnoisevoltagedensity
outputbuffergain=130nv/
√
Hz
(1)lsbmeansleastsignificantbit.
(2)dacistestedwithloadof25k
Ω
inparallelwith100pftoground.
(3)measuredfromcode0x008to0xfff.
3
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