Appendix A Specifications
© National Instruments Corporation A-5 SCXI-1125 User Manual
Analog Inputs
Number of input channels......................8 differential
Input range............................................. ± 2.5 mVDC to ±5 VDC
Input coupling........................................ DC (or AC with SCXI-1305 or
TBX-1329)
Input impedance
Normal powered on........................ >1 G || 100 pF in parallel
Powered off/overload......................4.5 M
With SCXI-1327............................. 1 M
With TBX-1316.............................. 40 M
Input bias current................................... ±100 pA typical, ±1 nA max
Filter type............................................... 3-pole Butterworth filter response
Bandwidth (–3dB cut-off frequency)
4 Hz filter........................................4 Hz ±5%
10 kHz filter....................................10 kHz ±5%
Full power bandwidth.............. 7 kHz ±5%
With SCXI-1327 or
SCXI-1313A high-voltage
terminal blocks........................ 2.6 kHz ±5%
With TBX-1316 high-voltage
terminal block.......................... 500 Hz ±5%
Slew rate
Typical.............................................0.15 V/μs
Minimum.........................................0.1 V/μs
Scan interval accuracy
±0.012%..........................................3 μs
±0.006%.........................................10 μs
±0.0015%........................................20 μs
Common Mode Rejection Ratio, 50/60 Hz (CMRR)
4 Hz filter enabled...........................160 dB
10kHz filter enabled........................98 dB