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AD6644ST/PCB 数据表(PDF) 11 Page - Analog Devices

部件名 AD6644ST/PCB
功能描述  Analog-to-Digital Converter
PDF  25 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD6644ST/PCB 数据表(HTML) 11 Page - Analog Devices

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AD6644
Rev. D | Page 10 of 24
ANALOG FREQUENCY (MHz)
95
75
60
55
85
65
80
100
70
90
WORST OTHER SPUR
HARMONICS (SECOND, THIRD)
0
102030
4050
6070
8090
100
ENCODE = 65MSPS
AIN = –1dBFS
Figure 10. Harmonics vs. Analog Frequency (IF)
ANALOG INPUT POWER LEVEL (dBFS)
100
50
10
0
90
40
70
120
20
30
60
80
110
dBc
dBFS
ENCODE = 65MSPS
AIN = 15.5MHz
SFDR = 90dB
REFERENCE LINE
–80
–70
–60
–50
–40
–30
–20
–10
0
Figure 11. Single-Tone SFDR
FREQUENCY (MHz)
0
–120
–130
–110
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
5
10
15
20
25
30
ENCODE = 65MSPS
AIN = 19MHz,
19.5MHz @ –7dBFS
NO DITHER
Figure 12. Two Tones at 19 MHz and 19.5 MHz
FREQUENCY (MHz)
0
–120
–130
–110
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
5
10
15
20
25
30
ENCODE = 65MSPS
AIN = 15MHz,
15.5MHz @ –7dBFS
NO DITHER
Figure 13. Two Tones at 15 MHz and 15.5 MHz
100
50
10
0
90
40
70
20
30
60
80
110
dBFS
dBc
ENCODE = 65MSPS
F1 = 15MHz
F2 = 15.5MHz
SFDR = 90dB
REFERENCE LINE
INPUT POWER LEVEL [(F1 = F2) dBFS]
–77
–67
–57
–47
–37
–27
–17
–7
Figure 14. Two-Tone SFDR
ENCODE FREQUENCY (MHz)
65
60
95
75
85
70
80
90
100
WORST SPUR
SNR
AIN = 2.2MHz @ –1dBFS
0
102030405060708090
Figure 15. SNR, Worst Spurious vs. Encode



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