Datasheet

AD9911
Rev. 0 | Page 15 of 44
0
–100
START 0Hz STOP 250MHz
05785-059
–10
–20
–30
–40
–50
–60
–70
–80
–90
25MHz/
(dB)
1
1
2
3
Figure 25. SpurKiller Disabled and Three Spurs Identified
0
–100
START 0Hz STOP 250MHz
05785-060
–10
–20
–30
–40
–50
–60
–70
–80
–90
25MHz/
(dB)
1
1
Figure 26. SpurKiller Enabled with Three Spurs Reduced (see
Figure 25)
0
–100
CENTER 20MHz SPAN 40MHz
(dB)
05785-061
–10
–20
–30
–40
–50
–60
–70
–80
–90
4MHz/
Figure 27. Three Auxiliary Channels Perform Two-Level FSK with Profile Pins.
The three carriers are set to 10 MHz, 20 MHz, and 30 MHz using all three
auxiliary channels.
–
45
–65
1.5 2.1
POWER SUPPLY VOLTAGE (V)
SFDR (dBc)
–50
–55
–60
1.6 1.7 1.8 1.9 2.0
f
OUT
= 98.7MHz
f
OUT
= 143.7MHz
f
OUT
= 197.7MHz
05785-028
Figure 28. SFDR vs. Supply Voltage (AVDD)
–
40
–65
01
DAC OUTPUT CURRENT LEVEL (% of Fullscale)
SFDR (dBc)
.000
–45
–50
–55
–60
0.125 0.250 0.375 0.500 0.625 0.750 0.875
f
OUT
= 98.7MHz
f
OUT
= 143.7MHz
f
OUT
= 197.7MHz
0
5785-029
Figure 29. SFDR vs. DAC Output Current
–
50
–66
TEMPERATURE (°C)
SFDR (dBc)
05785-030
–40-20 0 20406080
–52
–54
–56
–58
–60
–62
–64
f
OUT
= 98.7MHz
f
OUT
= 143.7MHz
f
OUT
= 197.7MHz
Figure 30. SFDR vs. Temperature