Datasheet

AD9776/AD9778/AD9779
Rev. A | Page 19 of 56
–150
–170
0 100
f
OUT
(MHz)
NSD (dBm/Hz)
–154
–158
–162
–166
20 40 60 80
f
DAC
= 800MSPS
f
DAC
= 400MSPS
f
DAC
= 200MSPS
05361-027
Figure 30. AD9779 Noise Spectral Density vs. f
DAC
,
Single-Tone Input at −6 dBFS
–55
–90
0 260
f
OUT
(MHz)
ACLR (dBc)
–60
–65
–70
–75
–80
–85
20 40 60 80 100 120 140 160 180 200 220 240
–6dBFS
–3dBFS
0dBFS – PLL ON
0dBFS
05361-028
Figure 31. AD9779 ACLR for First Adjacent Band WCDMA, 4× Interpolation,
f
DATA
= 122.88 MSPS, On-Chip Modulation Translates Baseband Signal to IF
–55
–90
0 260
f
OUT
(MHz)
ACLR (dBc)
–60
–65
–70
–75
–80
–85
20 40 60 80 100 120 140 160 180 200 220 240
–6dBFS
–3dBFS
0dBFS – PLL ON
0dBFS
05361-029
Figure 32. AD9779 ACLR for Second Adjacent Band WCDMA, 4×
Interpolation, f
DATA
= 122.88 MSPS. On-Chip Modulation Translates
Baseband Signal to IF
–55
–90
0 260
f
OUT
(MHz)
ACLR (dBc)
–60
–65
–70
–75
–80
–85
20 40 60 80 100 120 140 160 180 200 220 240
–6dBFS
–3dBFS
0dBFS – PLL ON
0dBFS
05361-030
Figure 33. AD9779 ACLR for Third Adjacent Band WCDMA, 4× Interpolation,
f
DATA
= 122.88 MSPS, On-Chip Modulation Translates Baseband Signal to IF