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Appendix A
Specifications
©
National Instruments Corporation
A-7
Input coupling ........................................ DC
Over-voltage protection
(CH<0..8/15>, I
EX±
,
I
EX0±
, I
EX1±
) ..................................... ±42 V powered on;
±17 V powered off
Data transfers ......................................... Interrupts, programmed I/O
Warm-up time ........................................ 30 minutes
Amplifier Characteristics
Input impedance
Normal powered on ........................ >1 G
Ω
in parallel with 0.39
µ
F
Powered off..................................... 10 k
Ω
Overload.......................................... 10 k
Ω
Open-thermocouple detection ................ 10 M
Ω
between CH+ and +2.5 V
(software-selectable)
Ground-referencing ................................ 10 M
Ω
between CH– and ground
(software-selectable)
Input bias current ................................... <500 pA
CMR (DC, 50 Hz, 60 Hz, 400 Hz)
Range
≥
2.5 V .................................. 80 dB
Range <2.5 V .................................. 100 dB
NMR (50 Hz, 60 Hz, 400 Hz) ................ >100 dB
Dynamic Characteristics
Bandwidth .............................................. 20 Hz
Step response (full-scale step)
)
Accuracy
Time(s)
±0.1%
0.3
±0.01%
0.5
±0.0015%
2.4