Datasheet

AD9776/AD9778/AD9779
Rev. A | Page 21 of 56
100
50
0 400
f
OUT
(MHz)
IMD (dBc)
90
80
70
60
40 80 120 160 200 240 280 320 360
4× 200MSPS
4× 150MSPS
4× 100MSPS
05361-035
Figure 38. AD9778 IMD, 4× Interpolation
100
50
0 100
f
OUT
(MHz)
SFDR (dBc)
90
80
70
60
20 40 60 80
f
DATA
= 250MSPS
f
DATA
= 200MSPS
f
DATA
= 160MSPS
05361-036
Figure 39. AD9778 In-Band SFDR, 2× Interpolation
–90
0
250
f
OUT
(MHz)
ACLR (dBc)
–70
–80
–60
25 50 75 100 125 150 175 200 225
1ST ADJ CHAN
2ND ADJ CHAN
3RD ADJ CHAN
05361-037
Figure 40. AD9778 ACLR, Single-Carrier WCDMA, 4× Interpolation,
f
DATA
= 122.88 MSPS, Amplitude = −3 dBFS
SPAN 50MHz
SWEEP 162.2ms (601 pts)VBW 300kHz
CENTER 143.88MHz
*RES BW 30kHz
RMS RESULTS
CARRIER POWER
–12.74dBm/
3.84000MHz
FREQ OFFSET
5.000MHz
10.00MHz
15.00MHz
REF BW
3.884MHz
3.840MHz
3.840MHz
dBc
–76.49
–80.13
–80.90
dBm
–89.23
–92.87
–93.64
LOWER
dBc
–76.89
–80.02
–79.53
dBm
–89.63
–92.76
–92.27
UPPER
REF –25.39dBm
*AVG
Log
10dB/
PAVG
10
W1 S2
*ATTEN 4dB
05361-038
Figure 41. AD9778 ACLR, f
DATA
= 122.88 MSPS, 4× Interpolation,
f
DAC
/4 Modulation
–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
05361-039
Figure 42. AD9778 Noise Spectral Density vs. f
DAC
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
05361-040
Figure 43. AD9778 Noise Spectral Density vs. f
DAC
Single-Tone Input
at −6 dBFS, f
DATA
= 200 MSPS