Datasheet

Data Sheet AD9958
Rev. B | Page 13 of 44
Figure 16. Residual Phase Noise (SSB) with f
OUT
= 15.1 MHz, 40.1MHz,
75.1 MHz, 100.3 MHz; f
CLK
= 500 MHz with REFCLK Multiplier Bypassed
Figure 17. Residual Phase Noise (SSB) with f
OUT
= 15.1 MHz, 40.1MHz,
75.1 MHz, 100.3 MHz; f
CLK
= 500 MHz with REFCLK Multiplier = 5×
Figure 18. Residual Phase Noise (SSB) with f
OUT
= 15.1 MHz, 40.1MHz,
75.1 MHz,100.3 MHz; f
CLK
= 500 MHz with REFCLK Multiplier = 20×
Figure 19. Channel Isolation at 500 MSPS Operation; Conditions are Channel
of Interest Fixed at 110.3 MHz, the Other Channels Are Frequency Swept
Figure 20. Power Dissipation vs. Reference Clock Frequency vs. Channel(s)
Power On/Off
Figure 21. Averaged Channel SFDR vs. f
OUT
–170
–160
–150
–140
–130
–120
–110
–100
10 100
1k 10k
100k 1M 10M
FREQUENCY OFFSET (Hz)
PHASE NOISE (dBc/Hz)
75.1MHz
100.3MHz
40.1MHz
15.1MHz
05252-018
–70
–170
10
10M
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
05252-019
–70
–170
10
10M
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
05252-020
–60
–85
25.3
200.3
–65
–70
–75
–80
50.3 75.3 100.3 125.3 150.3 175.3
SEPARATED DAC POWER PLANES
SINGLE DAC POWER PLANE
FREQUENCY OF COUPLING SPUR (MHz)
CHANNEL ISOLATION (dBc)
05252-021
600
0
500
REFERENCE CLOCK FREQUENCY (MHz)
TOTAL POWER DISSIPATION (mW)
500
400
300
200
100
450 400 350 300 250
200 150 100 50
2 CHANNELS ON
1 CHANNEL ON
05252-022
–45
–75
1.1
f
OUT
(MHz)
SFDR (dBc)
–50
–55
–60
–65
–70
15.1 40.1 75.1
100.3 200.3
SFDR AVERAGED
05252-023