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Appendix A Specifications
© National Instruments Corporation A-3 NI 7831R User Manual
Settling Time
Crosstalk.................................................–80 dB, DC to 100 kHz
Analog Output
Output Characteristics
Number of channels ...............................8 single-ended, voltage output
Resolution ..............................................16 bits, 1 in 65,536
Update time............................................1.0 µs
Max update rate......................................1 MS/s
Type of DAC..........................................Enhanced R-2R
Data transfers .........................................Interrupts, programmed I/O
Accuracy Information
Step Size
Accuracy
16 LSB 4LSB 2LSB
±20.0 V 7.5 µs 10.3 µs 40 µs
±2.0 V 2.7 µs 4.1 µs 5.1 µs
±0.2 V 1.7 µs 2.9 µs 3.6 µs
Nominal Range (V)
Absolute Accuracy
Absolute
Accuracy at
Full Scale
(mV)
% of Reading
Offset (µV)
Temp Drift
(%/°C)
Positive Full
Scale
Negative Full
Scale
24 Hours 1 Year
10.0 –10.0 0.0335 0.0351 2366 0.0005 5.88
Note: Accuracies are valid for analog output following an internal calibration. Analog output accuracies are listed for
operation 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.