Measurement Computing USB-2416, User Manual

Page: 34 / 48

USB-2416 User's Guide Specifications
34
Table 15. RMS noise performance specifications (µVRMS)
A/D data rate
Range (V) 3750 S/s 2000 S/s 1000 S/s 500 S/s 100 S/s 60 S/s 50 S/s 25 S/s 10 S/s 5 S/s 2.5 S/s
±20 34.90 28.32 19.22 15.17 8.67 8.67 7.51 7.22 3.61 3.61 2.17
±10 19.22 15.17 10.87 6.83 4.62 4.62 4.05 2.89 1.81 1.44 1.44
±5 8.60 7.21 5.18 3.92 2.46 2.17 2.17 2.16 0.90 0.72 0.72
±2.5 4.99 4.36 2.72 2.15 1.14 1.07 1.07 0.87 0.58 0.43 0.36
±1.25 2.81 2.66 2.10 1.41 0.83 0.83 0.76 0.58 0.51 0.51 0.43
±0.625 2.86 2.51 1.28 1.12 0.81 0.73 0.66 0.58 0.38 0.40 0.30
±0.3125 2.32 2.24 1.24 1.05 0.72 0.71 0.68 0.56 0.51 0.39 0.37
±0.15625 2.01 2.55 1.13 1.00 0.86 0.68 0.68 0.64 0.40 0.47 0.35
±0.078125 2.04 2.28 1.39 1.04 0.65 0.63 0.60 0.54 0.35 0.32 0.36
Table 16. Noise-free resolution specifications (bits)
A/D data rate
Range (V) 3750 S/s 2000 S/s 1000 S/s 500 S/s 100 S/s 60 S/s 50 S/s 25 S/s 10 S/s 5 S/s 2.5 S/s
±20 17.4 17.7 18.2 18.6 19.4 19.4 19.6 19.6 20.6 20.6 21.4
±10 17.2 17.6 18.1 18.7 19.3 19.3 19.5 20.0 20.6 21.0 21.0
±5 17.4 17.6 18.1 18.5 19.2 19.4 19.4 19.4 20.6 21.0 21.0
±2.5 17.2 17.4 18.1 18.4 19.3 19.4 19.4 19.7 20.3 20.7 21.0
±1.25 17.0 17.1 17.4 18.0 18.8 18.8 18.9 19.3 19.5 19.5 19.7
±0.625 16.0 16.2 17.1 17.3 17.8 18.0 18.1 18.3 18.9 18.8 19.2
±0.3125 15.3 15.3 16.2 16.4 17.0 17.0 17.0 17.3 17.5 17.9 17.9
±0.15625 14.5 14.1 15.3 15.5 15.7 16.1 16.1 16.1 16.8 16.9 17.1
±0.078125 14.5 14.3 15.0 15.4 16.1 16.2 16.2 16.4 17.0 17.1 16.9
Channel switching error
Table 17. Step response accuracy specifications
Accuracy S/s
Range (V)
3750
S/s
2000
S/s
1000
S/s
500
S/s
100
S/s
60 S/s 50 S/s 25 S/s 10 S/s 5 S/s 2.5 S/s
±20
0.001
1%
0.0006
%
0.0004
%
0.0003
%
0.0002
%
0.0002
%
0.0002
%
0.0002
%
0.0001
%
0.0001
%
0.0001
%
±10
0.001
0%
0.0008
%
0.0005
%
0.0004
%
0.0002
%
0.0002
%
0.0003
%
0.0002
%
0.0001
%
0.0001
%
0.0001
%
±5
0.000
9%
0.0008
%
0.0004
%
0.0004
%
0.0003
%
0.0002
%
0.0002
%
0.0002
%
0.0001
%
0.0001
%
0.0001
%
±2.5
0.001
0%
0.0007
%
0.0008
%
0.0004
%
0.0003
%
0.0002
%
0.0002
%
0.0002
%
0.0002
%
0.0001
%
0.0001
%
±1.25
0.001
3%
0.0009
%
0.0008
%
0.0007
%
0.0004
%
0.0004
%
0.0003
%
0.0003
%
0.0003
%
0.0003
%
0.0003
%
±0.625
0.002
2%
0.0016
%
0.0011
%
0.0011
%
0.0007
%
0.0007
%
0.0005
%
0.0005
%
0.0004
%
0.0005
%
0.0003
%
±0.3125
0.003
1%
0.0031
%
0.0020
%
0.0017
%
0.0015
%
0.0012
%
0.0010
%
0.0010
%
0.0012
%
0.0009
%
0.0009
%
±0.15625
0.005
6%
0.0062
%
0.0048
%
0.0037
%
0.0032
%
0.0025
%
0.0024
%
0.0021
%
0.0019
%
0.0022
%
0.0016
%
±0.078125
0.011
4%
0.0123
%
0.0076
%
0.0070
%
0.0041
%
0.0051
%
0.0046
%
0.0036
%
0.0032
%
0.0030
%
0.0034
%
Channel switching error is defined as the accuracy that can be expected after one conversion when switching
from a channel with a DC input at one extreme of full scale to another channel with a DC input at the other
extreme of full scale, expressed in terms of percentage of full scale value.