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Appendix A
Specifications for
Accuracy
Nominal
% of
Range
Reading
(V)
1 Year
±10 V
0.11
±1 V
0.12
Note: Accuracies are valid for measurements following an internal calibration and with autozero enabled, and are listed for
operational temperatures within ±1 °C of the internal calibration temperature and ±10 °C of 23 °C. Averaged numbers
assume 1,000 single-channel readings.
Transfer Characteristics
NI PXI-4224 User Manual
Input coupling.........................................DC
Bandwidth, –3 dB ...................................15 kHz
Slew rate .................................................2 V/μs typical
Input impedance
Powered on ......................................100 MΩ parallel 100 pF
Powered off .....................................30 kΩ
Input bias current ....................................100 pA
CMRR
Balanced ..........................................120 dB at DC to 60 Hz
10 kΩ imbalanced............................85 dB at DC to 60 Hz;
Crosstalk at 1 kHz
Adjacent channels............................–75 dB
All other channels............................–90 dB
Noise + Quantization
(μV)
Offset
Single
(μV)
Pt.
±1730
±6317
±176
±632
Nonlinearity ............................................0.02% FSR
DNL ........................................................±0.5 LSB typ, ±1 LSB max
No missing codes....................................16 bits, guaranteed
65 dB at 60 Hz to 10 kHz
Temperature Drift
Gain
Averaged
(%/°C)
±200
0.0025
±20.0
0.0025
A-2
Absolute
Accuracy
at Full
Offset
Scale
(μV/°C)
(mV)
230
12.6
26
1.4
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