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Appendix A Specifications
NI 7831R User Manual A-2 ni.com
Overvoltage protection ...........................±42 V
Data transfers..........................................Interrupts, programmed I/O
Accuracy Information
DC Transfer Characteristics
INL..........................................................±3 LSB typ, ±6 LSB max
DNL........................................................–1.0 to +2.0 LSB max
No missing codes resolution...................16 bits typ, 15 bits min
CMRR, DC to 60 Hz ..............................86 dB
Dynamic Characteristics
Bandwidth
Small signal (–3 dB)........................650 kHz
Large signal (1% THD)...................55 kHz
System noise...........................................1.8 LSB
rms
(including quantization)
Nominal Range (V)
Absolute Accuracy
Relative
Accuracy
% of Reading
Offset
(µV)
Noise +
Quantization
(µV)
Temp
Drift
(%/°C)
Absolute
Accuracy
at Full
Scale
(
±mV)
Resolution (µV)
Positive
Full
Scale
Negative
Full
Scale
24
Hours
1 Year
Single
Point
Averaged
Single
Point
Averaged
10.0 –10.0 0.0496 0.0507 2542 1779 165 0.0005 7.78 2170 217
Note: Accuracies are valid for measurements following an internal calibration. Measurement accuracies are listed for
operational temperatures within
±1 °C of internal calibration temperature and ±10 °C of external or factory-calibration
temperature. Temp drift applies only if ambient is greater than
±10 °C of previous external calibration.