User Manual
USB-2408 Series User's Guide Specifications
25
Table 9. Noise-free resolution specifications (bits)
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
17.2
17.6
18.1
18.7
19.3
19.3
19.5
20.0
20.6
21.0
21.0
±5 V
17.4
17.6
18.1
18.5
19.2
19.4
19.4
19.4
20.6
21.0
21.0
±2.5 V
17.2
17.4
18.1
18.4
19.3
19.4
19.4
19.7
20.3
20.7
21.0
±1.25 V
17.0
17.1
17.4
18.0
18.8
18.8
18.9
19.3
19.5
19.5
19.7
±0.625 V
16.0
16.2
17.1
17.3
17.8
18.0
18.1
18.3
18.9
18.8
19.2
±0.3125 V
15.3
15.3
16.2
16.4
17.0
17.0
17.0
17.3
17.5
17.9
17.9
±0.15625 V
14.5
14.1
15.3
15.5
15.7
16.1
16.1
16.1
16.8
16.9
17.1
±0.078125 V
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 10. Step response accuracy specifications
Accuracy
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
0.0010%
0.0008%
0.0005%
0.0004%
0.0002%
0.0002%
0.0003%
0.0002%
0.0001%
0.0001%
0.0001%
±5 V
0.0009%
0.0008%
0.0004%
0.0004%
0.0003%
0.0002%
0.0002%
0.0002%
0.0001%
0.0001%
0.0001%
±2.5 V
0.0010%
0.0007%
0.0008%
0.0004%
0.0003%
0.0002%
0.0002%
0.0002%
0.0002%
0.0001%
0.0001%
±1.25 V
0.0013%
0.0009%
0.0008%
0.0007%
0.0004%
0.0004%
0.0003%
0.0003%
0.0003%
0.0003%
0.0003%
±0.625 V
0.0022%
0.0016%
0.0011%
0.0011%
0.0007%
0.0007%
0.0005%
0.0005%
0.0004%
0.0005%
0.0003%
±0.3125 V
0.0031%
0.0031%
0.0020%
0.0017%
0.0015%
0.0012%
0.0010%
0.0010%
0.0012%
0.0009%
0.0009%
±0.15625 V
0.0056%
0.0062%
0.0048%
0.0037%
0.0032%
0.0025%
0.0024%
0.0021%
0.0019%
0.0022%
0.0016%
±0.078125 V
0.0114%
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.
Throughput rate
The single channel throughput rate is calculated using this formula:
Maximum throughput =
Table 11. Single channel throughput rate specifications
A/D data rate
Maximum throughput (Hz)
3750 S/s
1102.94
2000 S/s
877.19
1000 S/s
609.76
500 S/s
378.79
100 S/s
93.98
60 S/s
57.78
50 S/s
48.45
25 S/s
24.61
10 S/s
9.94
5 S/s
4.98
2.5 S/s
2.50