Datasheet

AD9540
Rev. A | Page 14 of 32
FREQUENCY (Hz)
L(f) (dBc/Hz)
0
–10
–20
–30
–40
–60
–50
–70
–80
–90
–100
–110
–130
–120
–140
–160
–150
–170
10 1k100 10k 100k 1M
04947-023
Figure 16. DDS/DAC Residual Phase Noise
400 MHz Clock, 19.7 MHz Output
FREQUENCY (Hz)
L(f) (dBc/Hz)
0
–10
–20
–30
–40
–60
–50
–70
–80
–90
–100
–110
–130
–120
–140
–160
–150
–170
10 1k100 10k 100k 10M1M
04947-024
Figure 17. DDS/DAC Residual Phase Noise
400 MHz Clock, 51.84 MHz Output
FREQUENCY (Hz)
L(f) (dBc/Hz)
0
–10
–20
–30
–40
–60
–50
–70
–80
–90
–100
–110
–130
–120
–140
–160
–150
–170
10 1k100 10k 100k 10M1M
04947-025
Figure 18. DDS/DAC Residual Phase Noise
400 MHz Clock, 105.3 MHz Output
FREQUENCY (Hz)
L(f) (dBc/Hz)
0
–10
–20
–30
–40
–60
–50
–70
–80
–90
–100
–110
–130
–120
–140
–160
–150
–170
10 1k100 10k 100k 10M1M
04947-026
Figure 19. DDS/DAC Residual Phase Noise
400 MHz Clock, 155.52 MHz Output
FREQUENCY (Hz)
L(f) (dBc/Hz)
0
–10
–20
–30
–40
–60
–50
–70
–80
–90
–100
–110
–130
–120
–140
–160
–150
–170
10 1k100 10k 100k 1M 2M
04947-0-027
Figure 20. RF Divider and CML Driver Residual
Phase Noise (81.92 MHz In, 10.24 MHz Out)
FREQUENCY (Hz)
L(f) (dBc/Hz)
0
–10
–20
–30
–40
–60
–50
–70
–80
–90
–100
–110
–130
–120
–140
–160
–150
–170
10 1k100 10k 100k 1M 2M
04947-0-028
Figure 21. RF Divider and CML Driver Residual
Phase Noise (157.6 MHz In, 19.7 MHz Out)