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AD7661AST Datasheet(PDF) 14 Page - Analog Devices

Part # AD7661AST
Description  16-Bit 100 kSPS PulSAR Unipolar ADC with Reference
PDF  29 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7661AST Datasheet(HTML) 14 Page - Analog Devices

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AD7661
Rev. 0 | Page 13 of 28
370
81
0
10005
16406
0
20000
40000
60000
80000
100000
120000
140000
7FFD 7FFE 7FFF 8000 8001 8002 8003 8004 8005 8006
CODE IN HEX
0
00
117518
116740
Figure 11. Histogram of 261,120 Conversions of a
DC Input at the Code Transition
–180
–160
–140
–120
–100
–80
–60
–40
–20
0
fS= 100kSPS
fIN= 45kHz
SNR = 89.2dB
THD = –102dB
SFDR = 103.1dB
S/[N+D] = 88.9dB
050
FREQUENCY (kHz)
10
20
30
40
Figure 12. FFT Plot
81
82
83
84
85
86
87
88
89
90
91
1
10
100
1000
FREQUENCY (kHz)
13.0
13.5
14.0
14.5
15.0
15.5
SNR
S/[N+D
]
ENOB
Figure 13. SNR, S/(N+D), and ENOB vs. Frequency
0
59
5181
3745
8
56132
61586
0
20000
40000
60000
80000
100000
120000
140000
7FFD 7FFE
7FFF
8000
8001
8002
8003
8004
7FFC
CODE IN HEX
160000
180000
0
134409
Figure 14. Histogram of 261,120 Conversions of a
DC Input at the Code Center
–120
–115
–110
–105
–100
–95
–90
–85
–80
–75
–70
1
10
100
1000
20
30
40
50
60
70
80
90
100
110
120
SFDR
THD
THIRD
HARMONIC
FREQUENCY (kHz)
SECOND
HARMONIC
Figure 15. THD, Harmonics, and SFDR vs. Frequency
87
88
89
90
91
92
–60
–50
–40
–30
–20
–10
0
INPUT LEVEL (dB)
SNR
S/[N+D]
Figure 16. SNR and S/(N+D) vs. Input Level (Referred to Full Scale)



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