© National Instruments Corporation A-1 SCXI-1120 User Manual
Appendix ASpecifications

This appendix lists the specifications for the SCXI-1120. These are typical at 25° C unless
otherwise stated. The operating temperature range is 0° to 50° C.

Analog Input

Gain (jumper-selectable) 1, 2, 5, 10, 20, 50, 100, 200, 500, 1,000, 2,000
Output range ±5 V
Number of channels 8
Gain accuracy 0.15% of full scale
Offset voltage
Input ±6 µV
Output ±3 mV
Stability versus ambient temperature
Input offset drift ±0.2 µV/°C
Output offset drift ±200 µV/°C
Gain drift 20 ppm/°C
Input bias current ±80 pA
Input resistance
Normal 40 MΩ
Power off 50 kΩ
Overload 50 kΩ
Output resistance
Multiplexed-Output mode 100 Ω
Parallel-Output mode 330 Ω
Filtering (jumper selectable) 4 Hz (-10 dB) or 10 kHz (-3 dB), 3-pole RC
Output selection time
(with 5 V step, all gains)
0.012% accuracy15.2 µsec typical, 7 µsec maximum
0.006% accuracy210 µsec
0.0015% accuracy220 µsec
1Includes the combined effects of the SCXI-1120 and the AT-MIO-16F-5
2Includes the combined effects of the SCXI-1120 and the AT-MIO-16X