Datasheet

Data Sheet AD9245
Rev. E | Page 15 of 32
INPUT FREQUENCY (MHz)
SNR (dBc)
0 25 50 75 100
65
75
–40C
+85C
74
73
72
71
70
69
68
67
66
125
03583-036
+25C
Figure 20. SNR vs. Input Frequency
DUTY CYCLE (%)
SNR/SFDR (dBc)
30 35 40 45 50 55 60 65
70
90
88
86
84
82
80
78
76
74
72
70
03583-037
SNR (DCS ON)
SNR (DCS OFF)
SFDR (DCS ON)
SFDR (DCS OFF)
Figure 21. SNR/SFDR vs. Clock Duty Cycle
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
AMPLITUDE (dBFS)
–120
0 9.6 19.2 28.8 38.4
FREQUENCY (MHz)
03583-059
Figure 22. 32K FFT WCDMA Carrier @ F
IN
= 96 MHz; Sample Rate = 76.8 MSPS
INPUT FREQUENCY (MHz)
SFDR (dBc)
0 25 50 75 100
70
100
95
90
85
80
75
125
–40C
+25C
+85C
03583-038
Figure 23. SFDR vs. Input Frequency
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
AMPLITUDE (dBFS)
–120
0 9.6 19.2 28.8 38.4
FREQUENCY (MHz)
03583-060
Figure 24. Two 32K FFT CDMA-2000 Carriers @
F
IN
= 46.08 MHz; Sample Rate = 61.44 MSPS
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
AMPLITUDE (dBFS)
–120
0 9.6 19.2 28.8 38.4
FREQUENCY (MHz)
03583-061
Figure 25. Two 32K FFT WCDMA Carriers @
F
IN
= 76.8 MHz; Sample Rate = 61.44 MSPS