AD9680 Datasheet, PDF (20/97 Pages) Analog Devices – Dual, 14-Bit, 1.25 GSPS, 1.2 V/2.5 V, Analog-to-Digital Converter

AD9680
Product
Overview
Online
Documentation
0
A_IN = –1dBFS
SNR = 59.8BFS
ENOB = 9.6 BITS
–20 _{SFDR = 79dBFS}
BUFFER CONTROL 1 = 8.0×
–40
–60
–80
–100
–120
0
100
200
300
400
500
FREQUENCY (MHz)
Figure 36. Single-Tone FFT with fIN = 1293.3 MHz
0
A_IN = –1dBFS
SNR = 57.7dBFS
ENOB = 9.2 BITS
–20 _{SFDR = 70dBFS}
BUFFER CONTROL 1 = 8.0×
–40
–60
–80
–100
–120
0
100
200
300
400
500
FREQUENCY (MHz)
Figure 37. Single-Tone FFT with fIN = 1725.3 MHz
0
A_IN = –1dBFS
SNR = 57.0dBFS
–20
ENOB = 9.1 BITS
SFDR = 69dBFS
BUFFER CURRENT = 6.0×
–40
–60
–80
–100
–120
0
100
200
300
400
500
FREQUENCY (MHz)
Figure 38. Single-Tone FFT with fIN = 1950.3 MHz
Design
Resources
Discussion
Sample
& Buy
Data Sheet
90
85
SFDR (dBFS)
80
75
70
SNR (dBFS)
65
60
700 750 800 850 900 950 1000 1050 1100
SAMPLE RATE (MHz)
Figure 39. SNR/SFDR vs. fS, fIN = 170.3 MHz; Buffer Control 1 (0x018) = 3.0×
90
85
80
75
70
65
60
55
50
10.3
1.5× SFDR (dBFS)
1.5× SNR (dBFS)
3.0× SFDR (dBFS)
3.0× SNR (dBFS)
63.3 100.3 170.3 225.3 302.3 341.3 403.3 453.3 502.3
ANALOG INPUT FREQUENCY (MHz)
Figure 40. SNR/SFDR vs. fIN; fIN < 500 MHz;
Buffer Control 1 (0x018) = 1.5× and 3.0×
100
90
80
70
60
4.0× SFDR
4.0× SNRFS
6.0× SFDR
6.0× SNRFS
50
476.8 554.4 593.2
670.8
748.4
826.0
903.6
ANALOG INPUT FREQUENCY (MHz)
981.2
Figure 41. SNR/SFDR vs. fIN; 500 MHz < fIN < 1 GHz;
Buffer Control 1 (0x018) = 4.0× and 6.0×
Rev. C | Page 20 of 97