Datasheet

AD9776A/AD9778A/AD9779A
Rev. B | Page 23 of 56
–90
0 250
F
OUT
(MHz)
ACLR (dBc)
–
55
25 50 75 100 125 150 175 200 225
–60
–65
–70
–75
–80
–85
06452-045
FIRST ADJACENT CHANNEL
SECOND ADJACENT
CHANNEL
THIRD ADJACENT
CHANNEL
Figure 48. AD9776A ACLR vs. f
OUT
,
f
DATA
= 122.88 MSPS, 4× Interpolation, f
DAC
/4 Modulation
SPAN 50MHz
SWEEP 162.2ms (601 pts)
VBW 300kHz
CENTER 143.88MHz
*RES BW 30kHz
RMS RESULTS
CARRIER POWER
–12.67dBm/
3.84000MHz
FREQ OFFSET
5.000MHz
10.00MHz
15.00MHz
REF BW
3.884MHz
3.840MHz
3.840MHz
dBc
–75.00
–78.05
–77.73
dBm
–87.67
–90.73
–90.41
LOWER
dBc
–75.30
–77.99
–77.50
dBm
–87.97
–90.66
–90.17
UPPER
REF –25.29dBm
*AVG
log
10dB
PAVG
10
W1 S2
*ATTEN 4dB
0
6452-046
Figure 49. AD9776A Single Carrier W-CDMA,
4× Interpolation, f
DATA
= 122.88 MSPS, Amplitude = −3 dBFS
–
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
10 30 50 70 90
06452-047
Figure 50. AD9776A Noise Spectral Density vs. f
OUT
,
Eight-Tone Input with 500 kHz Spacing, f
DATA
= 200 MSPS
–
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
10 30 50 70 90
06452-048
Figure 51. AD9776A Noise Spectral Density vs. f
OUT
,
Single-Tone Input at −6 dBFS, f
DATA
= 200 MSPS