Figure 1-2: effective-number-of-bits vs. gain, Figure 1-3: rms noise in µv vs. gain – ADLINK PCI-9524 User Manual
Page 25
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Introduction
9
ADLINK Technology Inc.
Copyright 2008
System Noise (LSBrms, including Quantization, Typical, 25ºC)
Figure 1-2: Effective-number-of-bits vs. Gain
ENOB vs PGA Gain
[Input = AGND]
14
15
16
17
18
19
20
21
22
23
24
25
2
5
10
15
25
30
50
60
100
500
1000
2000
3750
7500
15000
30000
Sam pling Rate [Sam ples per Second]
EN
O
B
[
b
it
s
]
Gain = 1
Gain = 2
Gain = 4
Gain = 8
Figure 1-3: RMS Noise in µV vs. Gain
RMS Noise vs PGA Gain
[Input = AGND]
0.1
1
10
100
1000
2
5
10
15
25
30
50
60
100
500
1000
2000
3750
7500
15000
30000
Sam pling Rate [Samples per Second]
N
o
ise [
u
V
]
Gain = 1
Gain = 2
Gain = 4
Gain = 8
Test conditions: RMS resolution and peak resolution are calcu-
lated relative to the full-scale range of their gain settings, using
internal calibration voltage references.
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