www.德州仪器.com
ELECTRICALCHARACTERISTICS
DAC5687
SLWS164B–FEBRUARY2005–REVISEDJUNE2005
overrecommendedoperatingfree-airtemperaturerange,avdd=3.3v,clkvdd=3.3v,pllvdd=3.3v,iovdd=3.3v,
dvdd=1.8v,iout
FS
=19.2ma(unlessotherwisenoted)
DCSPECIFICATIONS
PARAMETERTESTCONDITIONSMINTYPMAXUNIT
决议
16Bits
DCACCURACY
(1)
1LSB=IOUT
FS
/2
16
INLIntegralnonlinearity±4LSB
T
最小值
toT
最大值
DNLDifferentialnonlinearity±4LSB
ANALOGOUTPUT
coarsegainlinearity±0.04lsb
Worstcaseerrorfromideallinearity
Finegainlinearity±3LSB
offseterrormidcodeoffset0.01%fsr
Withoutinternalreference1%FSR
Gainerror
withinternalreference0.7%fsr
withinternalreference,dualdac,andssb
gainmismatch-22%fsr
模式
minimumfull-scaleoutputcurrent
(2)
2mA
maximumfull-scaleoutputcurrent
(2)
20mA
AVDDAVDD+
Outputcompliancerange
(3)
IOUT
FS
=20mAV
–0.5v0.5v
Outputresistance300k
Ω
Outputcapacitance5pF
REFERENCEOUTPUT
referencevoltage1.141.21.26v
Referenceoutputcurrent
(4)
100nA
REFERENCEINPUT
V
EXTIO
inputvoltagerange0.11.25v
Inputresistance1M
Ω
smallsignalbandwidth1.4mhz
Inputcapacitance100pF
TEMPERATURECOEFFICIENTS
ppmof
Offsetdrift±1
fsr/°c
Withoutinternalreference±15
ppmof
Gaindrift
fsr/°c
Withinternalreference±30
ppmof
Referencevoltagedrift±8
fsr/°c
POWERSUPPLY
avddanalogsupplyvoltage33.33.6v
dvdddigitalsupplyvoltage1.711.82.15v
clkvddclocksupplyvoltage33.33.6v
iovddi/osupplyvoltage1.713.6v
pllvddpllsupplyvoltage33.33.6v
(1)measureddifferentialacrossiouta1andiouta2orioutb1andioutb2with25
Ω
eachtoavdd.
(2)nominalfull-scalecurrent,iout
FS
,equals32xtheibiascurrent.
(3)thelowerlimitoftheoutputcomplianceisdeterminedbythecmosprocess.exceedingthislimitmayresultintransistorbreakdown,
resultinginreducedreliabilityofthedac5687device.theupperlimitoftheoutputcomplianceisdeterminedbytheloadresistorsand
全部-scaleoutputcurrent.exceedingtheupperlimitadverselyaffectsdistortionperformanceandintegralnonlinearity.
(4)useanexternalbufferamplifierwithhighimpedanceinputtodriveanyexternalload.
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