Measurement Computing USB-2408 Series - Manual (Page 24)

USB-2408 Series User's Guide Specifications
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Input bandwidth
Table 6. input bandwidth
A/D data rate –3 db Bandwidth (Hz)
3750 S/s 1615
2000 S/s 878
1000 S/s 441
500 S/s 221
100 S/s 44.2
60 S/s 26.5
50 S/s 22.1
25 S/s 11.1
10 S/s 4.42
5 S/s 2.21
2.5 S/s 1.1
Noise performance
For the peak-to-peak noise distribution test, a differential input channel is connected to AGND at the input
terminal block, and 50,000 samples are acquired at the maximum rate available at each setting.
Table 7. Peak-to-peak noise performance specifications (µV)
A/D data rate
Range 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
±10 V 126.84 100.14 71.76 45.06 30.52 30.52 26.70 19.07 11.92 9.54 9.54
±5 V 56.74 47.56 34.21 25.87 16.21 14.31 14.31 14.30 5.96 4.77 4.77
±2.5 V 32.96 28.79 17.94 14.19 7.51 7.09 7.09 5.72 3.81 4.00 4.00
±1.25 V 18.57 17.52 13.83 9.30 5.48 5.48 5.01 3.81 3.34 3.34 2.86
±0.625 V 18.88 16.58 8.45 7.41 5.32 4.80 4.38 3.86 2.50 2.61 1.98
±0.3125 V 15.33 14.76 8.19 6.94 4.75 4.69 4.49 3.70 3.34 2.56 2.45
±0.15625 V 13.28 16.84 7.47 6.61 5.70 4.48 4.48 4.24 2.66 3.07 2.29
±0.078125 V 13.47 15.02 9.17 6.88 4.28 4.16 4.00 3.57 2.28 2.13 2.40
Table 8. RMS noise performance specifications (µVRMS)
A/D data rate
Range 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
±10 V 19.22 15.17 10.87 6.83 4.62 4.62 4.05 2.89 1.81 1.44 1.44
±5 V 8.60 7.21 5.18 3.92 2.46 2.17 2.17 2.16 0.90 0.72 0.72
±2.5 V 4.99 4.36 2.72 2.15 1.14 1.07 1.07 0.87 0.58 0.60 0.60
±1.25 V 2.81 2.66 2.10 1.41 0.83 0.83 0.76 0.58 0.51 0.51 0.43
±0.625 V 2.86 2.51 1.28 1.12 0.81 0.73 0.66 0.58 0.38 0.40 0.30
±0.3125 V 2.32 2.24 1.24 1.05 0.72 0.71 0.68 0.56 0.51 0.39 0.37
±0.15625 V 2.01 2.55 1.13 1.00 0.86 0.68 0.68 0.64 0.40 0.47 0.35
±0.078125 V 2.04 2.28 1.39 1.04 0.65 0.63 0.60 0.54 0.35 0.32 0.36