Datasheet

AD9237 Data Sheet
Rev. B | Page 12 of 24
FREQUENCY (MHz)
AMPLITUDE (dBc)
0
–120
–100
–80
–60
–40
–20
SNR = 65.6dBc
SFDR = 67.1dBc
05455-014
0 30 32.5252015105
Figure 14. AD9237-65 100 MHz FFT
INPUT AMPLITUDE (dBFS)
SNR/SFDR (dBc and dBFS)
90
80
70
60
50
40
30
–30 0–5–10–15–20–25
05455-017
SFDR dBFS 4V p-p
SFDR dBc 4V p-p
SNR dBFS 2V p-p
SNR dBFS 4V p-p
SNR dBc 2V p-p
SNR dBc 4V p-p
SFDR dBFS 2V p-p
SFDR dBc 2V p-p
Figure 15. AD9237-65 SNR/SFDR vs. Input Amplitude with f
IN
= 35 MHz
INPUT AMPLITUDE (dBFS)
SNR/SFDR (dBc and dBFS)
100
90
80
70
60
50
40
30
–30 0–5–10–15–20–25
05455-019
SFDR dBFS 2V p-p
SNR dBc 2V p-p
SNR dBc 1V p-p
SFDR dBFS 1V p-p
SFDR dBc 2V p-p
SFDR dBc 1V p-p
SNR dBFS 2V p-p
SNR dBFS 1V p-p
Figure 16. AD9237-40 SNR/SFDR vs. Input Amplitude with f
IN
= 20 MHz
DUTY CYCLE (%)
SNR/SFDR (dBc)
90
50
55
60
65
70
75
80
85
30 7065605550454035
05455-030
SFDR DCS
ENABLED
SFDR DCS
DISABLED
SNR DCS ENABLED
SNR DCS DISABLED
Figure 17. SNR/SFDR vs. Clock Duty Cycle
INPUT AMPLITUDE (dBFS)
SNR/SFDR (dBc and dBFS)
90
80
70
60
50
40
30
–30 0–5–10–15–20–25
05455-018
SFDR dBFS 2V p-p
SNR dBFS 2V p-p
SNR dBFS 1V p-p
SNR dBc 2V p-p
SNR dBc 1V p-p
SFDR dBc 2V p-p
SFDR dBc 1V p-p
SFDR dBFS 1V p-p
Figure 18. AD9237-65 SNR/SFDR vs. Input Amplitude with f
IN
= 35 MHz
INPUT AMPLITUDE (dBFS)
SNR/SFDR (dBc and dBFS)
100
90
80
70
60
50
40
30
–30 0–5–10–15–20–25
05455-020
SFDR dBFS 2V p-p
SNR dBc 2V p-p
SNR dBc 1V p-p
SFDR dBFS 1V p-p
SFDR dBc 2V p-p
SFDR dBc 1V p-p
SNR dBFS 2V p-p
SNR dBFS 1V p-p
Figure 19. AD9237-20 SNR/SFDR vs. Input Amplitude with f
IN
= 10 MHz