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AD9958/PCB 数据表(PDF) 13 Page - Analog Devices

部件名 AD9958/PCB
功能描述  2-Channel 500 MSPS DDS with 10-Bit DACs
PDF  40 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD9958/PCB 数据表(HTML) 13 Page - Analog Devices

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AD9958
Rev. 0 | Page 13 of 40
–170
–160
–150
–140
–130
–120
–110
–100
10
100
1k
10k
100k
1M
10M
FREQUENCY OFFSET (Hz)
75.1MHz
100.3MHz
40.1MHz
15.1MHz
Figure 18. Residual Phase Noise (SSB) with fOUT = 15.1 MHz, 40.1MHz,
75.1 MHz, 100.3 MHz, fCLK = 500 MHz with REF_CLK Multiplier Bypassed
–70
–170
10
10M
FREQUENCY OFFSET (Hz)
–80
–90
–100
–110
–120
–130
–140
–150
–160
100
1k
10k
100k
1M
100.3MHz
75.1MHz
15.1MHz
40.1MHz
Figure 19. Residual Phase Noise (SSB) with fOUT = 15.1 MHz, 40.1MHz,
75.1 MHz, 100.3 MHz, fCLK = 500 MHz with REF_CLK Multiplier = 5x
–70
–170
10
10M
FREQUENCY OFFSET (Hz)
–80
–90
–100
–110
–120
–130
–140
–150
–160
100
1k
10k
100k
1M
100.3MHz
75.1MHz
15.1MHz
40.1MHz
Figure 20. Residual Phase Noise(SSB) with fOUT = 15.1 MHz, 40.1MHz,
75.1 MHz,100.3 MHz, fCLK = 500 MHz with REF_CLK Multiplier = 20×
–60
–85
25.3
200.3
FREQUENCY OF COUPLING SPUR (MHz)
–65
–70
–75
–80
50.3
75.3
100.3
125.3
150.3
175.3
SEPARATED DAC POWER PLANES
SINGLE DAC POWER PLANE
Figure 21. Channel Isolation at 500 MSPS Operation. Conditions are Channel
of Interest Fixed at 110.3 MHz, the Other Channels Are Frequency Swept.
600
0
500
REFERENCE CLOCK FREQUENCY (MHz)
500
400
300
200
100
450
400
350
300
250
200
150
100
50
2 CHANNELS ON
1 CHANNEL ON
Figure 22. Reference Clock Frequency vs. Power Dissipation vs. Channel(s)
Power On/Off
–45
–75
1.1
FOUT (MHz)
–50
–55
–60
–65
–70
15.1
40.1
75.1
100.3
200.3
SFDR AVERAGED
Figure 23. Averaged Channel SFDR vs. fOUT



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