AD6645 Просмотр технического описания (PDF) - Analog Devices
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AD6645 Datasheet PDF : 24 Pages
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AD6645
75.5
75.0
T = –40°C
74.5
T = +85°C
74.0
T = +25°C
73.5
73.0
72.5
ENCODE = 80MSPS @ AIN = –1dBFS
TEMP = –40°C, +25°C, +85°C
72.0
0
10
20
30
40
50
60
70
FREQUENCY (MHz)
Figure 10. Signal-to-Noise Ratio (SNR) vs. Frequency
94
92
90
T = +25°C
88
T = –40°C, +85°C
86
84
82
ENCODE = 80MSPS @ AIN = –1dBFS
TEMP = –40°C, +25°C, +85°C
80
0
10
20
30
40
50
60
70
ANALOG INPUT FREQUENCY (MHz)
Figure 11. Worst-Case Harmonics vs. Analog Input Frequency
76
75
74
73
72
71
ENCODE = 80MSPS @ AIN = –1dBFS
TEMP = 25°C
70
0 20 40 60 80 100 120 140 160 180 200
ANALOG FREQUENCY (MHz)
Figure 12. Signal-to-Noise Ratio (SNR) vs. Analog Frequency (IF)
100
95
WORST OTHER SPUR
90
85
80
HARMONICS
75
(SECOND, THIRD)
70
65
ENCODE = 80MSPS @ AIN = –1dBFS
TEMP = 25°C
60
0 20 40 60 80 100 120 140 160 180 200
ANALOG FREQUENCY (MHz)
Figure 13. Harmonics vs. Analog Frequency (IF)
120
110
dBFS
100
90 ENCODE = 80MSPS
80 AIN = 30.5MHz
70
dBc
60
50
40
SFDR = 90dB
REFERENCE LINE
30
20
10
0
–90 –80 –70 –60 –50 –40 –30 –20 –10 0
ANALOG INPUT POWER LEVEL (dBFS)
Figure 14. Single-Tone SFDR @ 30.5 MHz
120
110
dBFS
100
90 ENCODE = 80MSPS
80 AIN = 69.1MHz
70
dBc
60
50
SFDR = 90dB
REFERENCE LINE
40
30
20
10
0
–90 –80 –70 –60 –50 –40 –30 –20 –10 0
ANALOG INPUT POWER LEVEL (dBFS)
Figure 15. Single-Tone SFDR @ 69.1 MHz
Rev. D | Page 10 of 24
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