Analog Devices AD9776 Instruction Manual page 19

100
90
4 × 150MSPS
80
70
4 × 100MSPS
60
50
0 40 80 120 160 200
f
OUT
Figure 35. AD9778 IMD, 4× Interpolation
100
90
f
= 160MSPS
DATA
80
70
60
50
0 20 40
f
OUT
Figure 36. AD9778 In-Band SFDR, 2× Interpolation
–60
–70
3RD ADJ CHAN
–80
–90
0 25 50 75 100 125
f
OUT
Figure 37. AD9778 ACLR, Single-Carrier WCDMA, 4× Interpolation,
f = 122.88 MSPS, Amplitude = –3 dBFS
DATA
4 × 200MSPS
240 280 320 360 400
(MHz)
f
= 200MSPS
DATA
f
= 250MSPS
DATA
60 80 100
(MHz)
1ST ADJ CHAN
2ND ADJ CHAN
150 175 200 225 250
(MHz)
Rev. 0 | Page 19 of 56
AD9776/AD9778/AD9779
REF –25.39dBm *ATTEN 4dB
*AVG
Log
10dB/
PAVG
10
W1 S2
CENTER 143.88MHz
*RES BW 30kHz VBW 300kHz
RMS RESULTS
FREQ OFFSET REF BW
CARRIER POWER 5.000MHz 3.884MHz
–12.74dBm/ 10.00MHz 3.840MHz
3.84000MHz 15.00MHz 3.840MHz
Figure 38. AD9778 ACLR, f
DATA
f /4 Modulation
DAC
–150
–154
f
= 200MSPS
DAC
–158
–162
–166
–170
0 20 40
Figure 39. AD9778 Noise Spectral Density vs. f
with 500 kHz Spacing, f
–150
–154
f
= 200MSPS
DAC
–158
–162
f
= 800MSPS
DAC
–166
–170
0 20 40
Figure 40. AD9778 Noise Spectral Density vs. f
at –6 dBFS, f
SPAN 50MHz
SWEEP 162.2ms (601 pts)
LOWER UPPER
dBc dBm dBc dBm
–76.49 –89.23 –76.89 –89.63
–80.13 –92.87 –80.02 –92.76
–80.90 –93.64 –79.53 –92.27
= 122.88 MSPS, 4× Interpolation,
f
= 400MSPS
DAC
f
= 800MSPS
DAC
60 80 100
f
(MHz)
OUT
Eight-Tone Input
DAC
= 200 MSPS
DATA
f
= 400MSPS
DAC
60 80
100
f
(MHz)
OUT
Single-Tone Input
DAC
= 200 MSPS
DATA