Datasheet

AD9776/AD9778/AD9779
Rev. A | Page 22 of 56
0.4
0 4096
CODE
INL (12-BIT LSB)
–0.4
512 1024 256020481536 3072 3584
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
05361-041
Figure 44. AD9776 Typical INL
0.20
0 4096
CODE
DNL (12-BIT LSB)
2048
–0.20
512 1024 1536 2560 3072 3584
0.15
0.10
0.05
0
–0.05
–0.10
–0.15
05361-042
Figure 45. AD9776 Typical DNL
100
50
0 400
f
OUT
(MHz)
IMD (dBc)
40 80 120 160 200 240 280 320 360
4× 200MSPS
4× 100MSPS
4× 150MSPS
95
90
85
80
75
70
65
60
55
05361-043
Figure 46. AD9776 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
05361-044
Figure 47. AD9776 In-Band SFDR, 2× Interpolation
–90
0
250
F
OUT
(MHz)
ACLR (dBc)
–55
25 50 75 100 125 150 175 200 225
1ST ADJ CHAN
2ND ADJ CHAN
3RD ADJ CHAN
–60
–65
–70
–75
–80
–85
05361-045
Figure 48. AD9776 ACLR, 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
05361-046
Figure 49. AD9776, Single Carrier WCDMA, 4× Interpolation,
f
DATA
= 122.88 MSPS, Amplitude = −3 dBFS