Adlink PCI-9524 Manual do Utilizador Página 25

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Introduction 9
ADLINK Technology Inc. PCI-9524
Copyright 2008 User’s Manual
System Noise (LSBrms, including Quantization, Typical, 25ºC)
Figure 1-2: Effective-number-of-bits vs. Gain
ENOB vs PGA Gain
[Input = AGND]
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2 5 10 15 25 30 50 60 100 500 1000 2000 3750 7500 15000 30000
Sampling Rate [Samples per Second]
ENOB [bits
]
Gain = 1 Gain = 2 Gain = 4 Gain = 8
Figure 1-3: RMS Noise in µV vs. Gain
RMS Nois e 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
Sampling Rate [Samples per Second]
Noise [uV]
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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