Datasheet

AD9959
Rev. B | Page 13 of 44
–170
–160
–150
–140
–130
–120
–110
100
10 100 1k 10k 100k 1M 10M
FREQUENCY OFFSET (Hz)
PHASE NOISE (dBc/Hz)
05246-034
75.1MHz
100.3MHz
40.1MHz
15.1MHz
Figure 16. Residual Phase Noise (SSB) with f
OUT
= 15.1 MHz, 40.1 MHz,
75.1 MHz, 100.3 MHz; f
CLK
= 500 MHz with REFCLK Multiplier Bypassed
70
–170
10 10M
05246-035
FREQUENCY OFFSET (Hz)
PHASE NOISE (dBc/Hz)
–80
–90
–100
–110
–120
–130
–140
–150
–160
100 1k 10k 100k 1M
100.3MHz
75.1MHz
15.1MHz
40.1MHz
Figure 17. Residual Phase Noise (SSB) with f
OUT
= 15.1 MHz, 40.1 MHz,
75.1 MHz, 100.3 MHz; f
CLK
= 500 MHz with REFCLK Multiplier = 5×
70
–170
10 10M
05246-036
FREQUENCY OFFSET (Hz)
PHASE NOISE (dBc/Hz)
–80
–90
–100
–110
–120
–130
–140
–150
–160
100 1k 10k 100k 1M
100.3MHz
75.1MHz
15.1MHz
40.1MHz
Figure 18. Residual Phase Noise (SSB) with f
OUT
= 15.1 MHz, 40.1 MHz,
75.1 MHz,100.3 MHz; f
CLK
= 500 MHz with REFCLK Multiplier = 20×
60
–85
25.3 200.3
05246-037
FREQUENCY OF COUPLING SPUR (MHz)
CHANNEL ISOLATION (dBc)
–65
–70
–75
–80
50.3 75.3 100.3 125.3 150.3 175.3
SEPARATE DAC POWER PLANES
SINGLE DAC POWER PLANE
Figure 19. 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
05246-038
REFERENCE CLOCK FREQUENCY (MHz)
TOTAL POWER DISSIPATION (mW)
500
400
300
200
100
450 400 350 300 250 200 150 100 50
3 CHANNELS ON
4 CHANNELS ON
2 CHANNELS ON
1 CHANNEL ON
Figure 20. Power Dissipation vs. Reference Clock Frequency vs. Channel(s)
Power On/Off
45
–75
1.1
05246-045
f
OUT
(MHz)
SFDR (dBc)
–50
–55
–60
–65
–70
15.1 40.1 75.1 100.3 200.3
SFDR AVERAGED
Figure 21. Averaged Channel SFDR vs. f
OUT