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© National Instruments Corporation
A-1
SC-2043-SG User Manual
Appendix A
Specifications
This appendix lists the specifications for the SC-2043-SG. These are typical at 25
°
C unless otherwise noted.
Analog Input
Input Characteristics
Number of channels ....................................................
8
differential
Input signal ranges ......................................................
±
1 V (fixed gain of 10 on each channel)
Max working voltage ( common mode) .........
Each input should remain within
±
11 V of ground
Overvoltage protection ................................................
±
45 V powered on,
±
30 V powered off
Inputs protected ....................................................
CH<0..7>
±
Transfer Characteristics
Nonlinearity ................................................................
±
0.01% FSR
Gain error ....................................................................
±
0.15% of reading max
Amplifier Characteristics
Input impedance
Normal powered on ..............................................
10 G
Ω
Powered off or overload.......................................
5.2
k
Ω
Input bias current ........................................................
±
2.5 nA
Input offset current ......................................................
±
1.5 nA
CMRR .........................................................................
93 dB min
Output range ................................................................
±
11 V
Dynamic Characteristics
Bandwidth ...................................................................
1.6 kHz (single-pole RC filter)
System noise ................................................................
5
µ
Vrms (referred to input)
Stability
Recommended warm-up time .....................................
10
minutes
Offset temperature coefficient.....................................
±
3.5
µ
V/
°
C (referred to input)
Gain temperature coefficient .......................................
±
10 ppm/
°
C
Excitation
Channels ......................................................................
1, connected to 8 screw terminal pairs
Level ............................................................................
2.5
V,
±
0.5% (adjustable from 1.5 to 2.5 V)
Current drive
1
..............................................................
167 mA at 2.5 V
Drift .............................................................................
±
480 ppm/
°
C
1
Excitation current drive assumes eight full-bridge 120
Ω
strain gauges.