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electricalcharacteristics:v
REF
=+5V
ADS1232
ADS1234
SBAS350–JUNE2005
AllspecificationsT
一个
=–40°cto+105°c,avdd=dvdd=vrefp=+5v,vrefn=agnd,internaloscillator,速=
低,增益=64(unlessotherwisespecified).
ads1232,ads1234
PARAMETERCONDITIONSMINTYPMAXUNIT
AnalogInputs
全部-scaleinputvoltage
±0.5v
REF
/gainv
(ain
P
-ain
N
)
AINxPorAINxN
agnd–0.1avdd+0.1v
withrespecttognd,增益=1
一般-modeinputrange
增益=64,128(0.5)avdd–1(0.5)avdd+1v
增益=1,2500na
DifferentialInputCurrent
增益=64,12850na
SystemPerformance
ResolutionNomissingcodes24Bits
internaloscillator,速=高
TBD
80
TBD
SPS
internaloscillator,速=低
TBD
10
TBD
SPS
ConversionRate
externaloscillator,速=highf
CLK
/61440sps
externaloscillator,速=lowf
CLK
/491520sps
DigitalFilterSettlingTimeFullSettling4Conversions
differentialinput,endpointfit
±
0.0002
±
0.0015%offsr
(1)
增益=1,2
integralnon-线性(inl)
differentialinput,endpointfit
±
0.0010
TBD
%ofFSR
增益=64,128
Gain=1
±
0.2
TBD
ppmofFS
InputOffsetError
(2)
Gain=64
±
2
TBD
ppmofFS
增益=11µv/°c
InputOffsetErrorDrift
增益=6415nv/°c
增益=10.001
TBD
%
GainError
(3)
增益=640.001
TBD
%
增益=10.5ppm/
°
C
GainErrorDrift
Gain=64
±
4ppm/
°
C
internaloscillator,50hzand60hz100110db
正常的-moderejection
(4)
externaloscillator,
120130dB
50hzand60hz,
±
1Hz
atdc,增益=1,
∆
VDD=1V
TBD
100dB
一般-moderejection
atdc,增益=64,
∆
vdd=0.1v
TBD
75dB
输入-referrednoiseseenoiseperformancetables
atdc,增益=1,
∆
VDD=1V
TBD
100dB
电源-supplyrejection
atdc,增益=64,
∆
vdd=0.1v
TBD
85dB
VoltageReferenceInput
VoltageReferenceInput
V
REF
=vrefp-vrefn1avddavdd+0.1vv
(v
REF
)
NegativeReferenceInput
agnd–0.1vrefp–1.0v
(vrefn)
PositiveReferenceInput
vrefn+1.0avdd+0.1v
(vrefp)
VoltageReference
50nA
InputCurrent
(1)fsr=fullscalerange=v
REF
/增益
(2)offsetcalibrationcanminimizetheseerrorstothelevelofnoiseatanytemperature.
(3)gainerrorsarecalibratedatthefactory(avdd=+5v,allgains,t
一个
=+25
°
c).
(4)specificationisassuredbythecombinationofdesignandfinalproductiontest.
3
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