AD6645 데이터 시트보기 (PDF) - Analog Devices
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AD6645 Datasheet PDF : 24 Pages
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0
ENCODE = 80MSPS
–10 AIN = 30.5MHz,
–20
31.5MHz (–7dBFS)
NO DITHER
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
0
5
10
15
20
25
30
35
40
FREQUENCY (MHz)
Figure 16. Two-Tone SFDR @ 30.5 MHz and 31.5 MHz
110
100
90
ENCODE = 80MSPS
80 F1 = 30.5MHz
F2 = 31.5MHz
70
60
50
40
dBFS
dBc
SFDR = 90dB
REFERENCE LINE
30
20
10
0
–77
–67
–57
–47
–37
–27
–17
–7
INPUT POWER LEVEL (F1 = F2 dBFS)
Figure 17. Two-Tone SFDR @ 30.5 MHz and 31.5 MHz
100
95
WORST SPUR @ AIN = 2.2MHz
90
85
80
SNR @ AIN = 2.2MHz
75
70
65
15
30
45
60
75
90
105
ENCODE FREQUENCY (MHz)
Figure 18. SNR, Worst-Case Spurious vs. Encode @ 2.2 MHz
AD6645
0
ENCODE = 80MSPS
–10 AIN = 55.25MHz,
56.25MHz (–7dBFS)
–20 NO DITHER
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
0
5
10
15
20
25
30
35
40
FREQUENCY (MHz)
Figure 19. Two-Tone SFDR @ 55.25 MHz and 56.25 MHz
110
100
dBFS
90
80 ENCODE = 80MSPS
F1 = 55.25MHz
70 F2 = 56.25MHz
dBc
60
50
SFDR = 90dB
REFERENCE LINE
40
30
20
10
0
–77
–67
–57
–47
–37
–27
–17
–7
INPUT POWER LEVEL (F1 = F2 dBFS)
Figure 20. Two-Tone SFDR @ 55.25 MHz and 56.25 MHz
95
WORST SPUR @ AIN = 69.1MHz
90
85
80
75
SNR @ AIN = 69.1MHz
70
65
15
30
45
60
75
90
105
ENCODE FREQUENCY (MHz)
Figure 21. SNR, Worst-Case Spurious vs. Encode @ 69.1 MHz
Rev. D | Page 11 of 24
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