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AD7643 Datasheet(PDF) 13 Page - Analog Devices

Part # AD7643
Description  18-Bit, 1.25 MSPS PulSAR
PDF  28 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7643 Datasheet(HTML) 13 Page - Analog Devices

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AD7643
Rev. 0 | Page 13 of 28
FREQUENCY (kHz)
0
–180
0600
0
–180
0600
FREQUENCY (kHz)
–20
–40
–60
–80
–100
–120
–140
–160
100
200
300
400
500
fS = 1.25MSPS
fIN = 20.03kHz
SNR = 93.4dB
THD = –113dB
SFDR = 108dB
SINAD = 93.4dB
–20
–40
–60
–80
–100
–120
–140
–160
100
200
300
400
500
fS = 1.25MSPS
fIN = 100.03kHz
SNR = 93dB
THD = –106dB
SFDR = 109dB
SINAD = 92.8dB
Figure 11. FFT 20 kHz
95
75
1
1000
FREQUENCY (kHz)
SINAD
ENOB
SNR
93
91
89
87
85
83
81
79
77
16.0
12.0
15.6
15.2
14.8
14.4
14.0
13.6
13.2
12.8
12.4
10
100
Figure 12. SNR, SINAD, and ENOB vs. Frequency
–70
–140
1
1000
FREQUENCY (kHz)
SFDR
THD
120
20
110
100
90
80
70
60
50
40
30
10
100
–80
–90
–100
–110
–120
–130
THIRD HARMONIC
SECOND HARMONIC
Figure 13. THD, Harmonics, and SFDR vs. Frequency
Figure 14. FFT 100 kHz
95
94
93
92
91
90
19
18
17
16
15
14
–55
125
105
SNR
85
65
45
25
5
–15
–35
TEMPERATURE (°C)
ENOB
SINAD
Figure 15. SNR, SINAD, and ENOB vs. Temperature
–85
–90
–95
–100
–105
–110
–115
–120
–125
–130
–135
–140
–145
120
60
70
80
90
100
110
–55
125
105
85
65
45
25
5
–15
–35
TEMPERATURE (°C)
SFDR
THD
SECOND
HARMONIC
THIRD
HARMONIC
Figure 16. THD, Harmonics, and SFDR vs. Temperature



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