National Instruments NI 7831R - Manual (Page 45)

© National Instruments Corporation A-1 NI 7831R User Manual
A
Specifications
This appendix lists the specifications of the NI 7831R. These specifications
are typical at 25 °C unless otherwise noted.
Analog Input
Input Characteristics
Number of channels ............................... 8
Input modes............................................ DIFF, RSE, NRSE
(software-selectable; selection
applies to all 8 channels)
Type of ADC.......................................... Successive approximation
Resolution .............................................. 16 bits, 1 in 65,536
Conversion time ..................................... 4 µ s
Maximum sampling rate ........................ 200 kS/s (per channel)
Input impedance
Powered on ..................................... 10 G
Ω in parallel with 100 pF
Powered off..................................... 4 k Ω min
Overload.......................................... 4 k
Ω min
Input signal range
................................... ±10 V
Input bias current
................................... ±2 nA
Input offset current
................................. ±1 nA
Input coupling ........................................ DC
Maximum working voltage
(signal + common mode) ....................... Inputs should remain
within
±12 V of ground