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AD9680 Datasheet(PDF) 16 Page - Analog Devices

Part # AD9680
Description  Dual, 14-Bit, 1.25 GSPS, 1.2 V/2.5 V, Analog-to-Digital Converter
PDF  97 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD9680 Datasheet(HTML) 16 Page - Analog Devices

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Product
Overview
Online
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Resources
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Sample
& Buy
AD9680
Data Sheet
Rev. C | Page 16 of 97
–120
–100
–80
–60
–40
–20
0
0
625.000
FREQUENCY (MHz)
AIN = –1dBFS
SNR = 58.5dBFS
ENOB = 9.3 BITS
SFDR = 68dBFS
BUFFER CURRENT = 5.5×
78.125
156.250 234.375 312.500 390.625 468.750 546.875
Figure 12. Single-Tone FFT with fIN = 1205.3 MHz
–120
–100
–80
–60
–40
–20
0
0
625.000
FREQUENCY (MHz)
AIN = –1dBFS
SNR = 56.6dBFS
ENOB = 9.0 BITS
SFDR = 67dBFS
BUFFER CURRENT = 7.5×
78.125
156.250 234.375 312.500 390.625 468.750 546.875
Figure 13. Single-Tone FFT with fIN = 1602.3 MHz
–120
–100
–80
–60
–40
–20
0
0
625.000
FREQUENCY (MHz)
AIN = –1dBFS
SNR = 55.4dBFS
ENOB = 8.8 BITS
SFDR = 63dBFS
BUFFER CURRENT = 8.5×
78.125
156.250 234.375 312.500 390.625 468.750 546.875
Figure 14. Single-Tone FFT with fIN = 1954.3 MHz
60
85
80
75
70
65
SAMPLE RATE (MHz)
SNR
SFDR
1000 1020 1040 1060 1080 1100 1120 1140 1160 1180 1200 1220 1240 1260
Figure 15. SNR/SFDR vs. fS, fIN = 170.3 MHz; Buffer Control 1 (0x018) = 3.5×
667.3
589.3
511.3
433.3
355.3
290.3
212.3
147.3
10.3
INPUT FREQUENCY (MHz)
60
65
70
75
80
85
3.5× SNR (dBFS)
3.5× SFDR (dBFS)
4.5× SNR (dBFS)
4.5× SFDR (dBFS)
Figure 16. SNR/SFDR vs. fIN; fIN < 700 MHz;
Buffer Control 1 (0x018) = 3.5× and 4.5×
INPUT FREQUENCY (MHz)
55
60
65
70
75
80
SNR 6.5×
SFDR 6.5×
628.3
706.6
784.3
862.3
940.3 1018.3 1096.3 1174.3 1252.3
Figure 17. SNR/SFDR vs. fIN; 650 MHz < fIN < 1.3 GHz;
Buffer Control 1 (0x018) = 6.5×



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