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ADAQ7980 Datasheet(PDF) 18 Page - Analog Devices

Part # ADAQ7980
Description  16-Bit, 1 MSPS, Integrated Data Acquisition Subsystem
PDF  49 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADAQ7980 Datasheet(HTML) 18 Page - Analog Devices

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ADAQ7980/ADAQ7988
Data Sheet
Rev. 0 | Page 18 of 49
180000
160000
140000
120000
100000
80000
60000
40000
20000
0
ADC CODE
32785 32786 32787 32788 32789 32790 32791 32792 32793
03
979
52669
170828
37210
454
10
TOTAL COUNT = 262144
Figure 11. Histogram of a DC Input at the Code Center, REF = 5 V
140000
120000
100000
80000
60000
40000
20000
0
ADC CODE
TOTAL COUNT = 262144
0
64
8973
118166
124157
10708
76
0
32790 32791 32792 32793 32794 32795 32796 32797
Figure 12. Histogram of a DC Input at the Code Transition, REF = 5 V
93
88
87
91
92
90
89
86
15.0
14.3
14.1
14.8
14.9
14.7
14.5
14.4
14.2
14.6
14.0
2.4
4.9
4.4
3.4
3.9
2.9
REFERENCE (V)
SNR
SINAD
ENOB
Figure 13. SNR, SINAD, and ENOB vs. Reference Voltage
100000
90000
70000
50000
30000
80000
60000
40000
20000
10000
0
ADC CODE
TOTAL COUNT = 262144
01
23
349
3857
21893
62761
88057
60351
20580
3829
426
17
0
Figure 14. Histogram of a DC Input at the Code Center, REF = 2.5 V
–120
–130
–132
–136
–134
–138
–124
–122
–126
–128
–140
–10
0
–2
–4
–6
–8
–1
–3
–5
–7
–9
INPUT LEVEL (dBFS)
FFT SIZE = 65536
Figure 15. Noise Floor vs. Input Level
–95
–120
–105
–100
–110
–115
–125
115
90
105
110
100
95
85
2.25
5.25
4.25
3.25
4.75
3.75
2.75
REFERENCE VOLTAGE (V)
THD
SFDR
Figure 16. THD and SFDR vs. Reference Voltage



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