National Instruments SCXI -1122 - Manual (Page 48)

Specifications Appendix A
SCXI-1122 User Manual A-2 © National Instruments Corporation
Transfer Characteristics
Nonlinearity
0.01% FSR
Offset error
Gain
≥
1
±
(6
µ
V + 1,240
µ
V/gain)
Gain < 1
±
(352
µ
V + 1,240
µ
V/gain)
Gain error
Gain
≥
1
±
0.02% of reading
Gain < 1
±
0.10% of reading
Amplifier Characteristics
Input impedance
Normal powered on 1 G
Ω
in parallel with 100 pF for gain
≥
1,
1 M
Ω
in parallel with 100 pF for gain < 1
Powered off 100 k
Ω
Overload 100 k
Ω
Input bias current
±
80 pA
CMRR
Filter Bandwidth CMRR 50 or 60 Hz
4 Hz 160 dB
4 kHz 100 dB
Output range
±
10 V
Output impedance 75
Ω
Dynamic Characteristics
Bandwidth (-3 dB)
4 Hz (-10 dB) or 4 kHz, software selectable
Settling time to full-scale step (all gains)
with 4 kHz filter enabled 10 ms
with 4 kHz filter enabled 1 s
System noise
Gain 4 Hz Filter 4 kHz Filter
1 150
µ
Vrms 1 mVrms
1,000 1,000 nVrms 4
µ
Vrms
Slew rate 0.10 V/
µ
s
Filters
Type
3-pole RC
Cutoff frequency (-3 dB) 4 Hz (-10 dB) or 4 kHz, software selectable
NMR (50 or 60 Hz) 60 dB at 4 Hz bandwidth
Stability
Recommended warm-up time
20 minutes
Offset temperature coefficient
±
(0.2 + 150/gain)
µ
V/
°
C
Gain temperature coefficient
±
10 ppm/
°
C for gain
≥
1,
±
25 ppm/
°
C for gain < 1