AD9858 Datasheet, PDF (12/32 Pages) Analog Devices – 1 GSPS Direct Digital Synthesizer

AD9858
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100
1K
10K
100K
1M
10M
FREQUENCY (Hz)
Figure 15. Residual Phase Noise, 103 MHz FOUT, 1 GHz REFCLK
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10K 100K 1M
FREQUENCY (Hz)
10M 100M
Figure 16. Fractional Divider Loop Residual Phase Noise,
FIN = 115 MHz, FOUT = 1550 MHz, Loop BW = 50 kHz
REF LVL
0dBm
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DELTA 1 [T1]
RBW
0.0dB VBW
0.00000000Hz SWT
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CENTER 1.55GHz
150kHz/
1kHz RF ATT
1kHz
3.8s UNIT
10dB
dBm
A
1AP
SPAN 1.55MHz
Figure 17. Fractional Divider Loop SFDR, FIN = 96.9 MHz,
FOUT = 1550 MHz, BW = 1.5 MHz
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100
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10K
100K
1M
10M
FREQUENCY (Hz)
Figure 18. Residual Phase Noise, 403 MHz FOUT, 1 GHz REFCLK
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10 100
1K
10K 100K 1M
FREQUENCY (Hz)
10M 100M
Figure 19. Translation Loop Residual Phase Noise
FLO = 1500 MHz, FOUT = 1550 MHz, Loop BW = 50 kHz
REF LVL
0dBm
0
–10
DELTA 1 [T1]
RBW
–56.76dB VBW
423.84769539kHz SWT
1
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CENTER 1.55GHz
150kHz/
2kHz RF ATT
2kHz
940s UNIT
10dB
dBm
A
1AP
1
SPAN 1.5MHz
Figure 20. Fractional Divider Loop SFDR, FIN = 97.3 MHz,
FOUT = 1550 MHz, BW = 1.5 MHz
Rev. A | Page 12 of 32