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AD9776A/AD9778A/AD9779A
Rev. B | Page 21 of 56
1.5
0
CODE
IN
L
(
14
-B
IT
LS
B
)
10k
1.0
0.5
0
–0.5
–1.0
–1.5
2k
4k
6k
8k
0
64
52
-0
33
Figure 36. AD9778A Typical INL
0.6
0
CODE
DNL
(
14-
B
IT
L
S
B)
–0.2
–1.0
16k
14k
12k
10k
8k
6k
4k
2k
0.4
0.2
0
–0.4
–0.6
–0.8
06
45
2-
0
34
Figure 37. AD9778A Typical DNL
100
50
0
400
fOUT (MHz)
IM
D
(
d
Bc)
90
80
70
60
40
80
120
160
200
240
280
320
360
4× 200MSPS
4× 150MSPS
4× 100MSPS
06
45
2-
0
35
Figure 38. AD9778A IMD vs. fOUT,
4× Interpolation
100
50
0
100
fOUT (MHz)
SF
D
R
(
d
B
c)
90
80
70
60
20
40
60
80
fDATA = 250MSPS
fDATA = 200MSPS
fDATA = 160MSPS
06
45
2-
0
36
Figure 39. AD9778A In-Band SFDR vs. fOUT,
2× Interpolation
–90
0
250
fOUT (MHz)
ACL
R
(
d
Bc) –70
–80
–60
25
50
75
100
125
150
175
200
225
FIRST ADJACENT CHANNEL
SECOND ADJACENT
CHANNEL
THIRD ADJACENT
CHANNEL
06
45
2-
0
37
Figure 40. AD9778A ACLR, Single Carrier W-CDMA,
4× Interpolation, fDATA = 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
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
0
645
2-
0
38
Figure 41. AD9778A ACLR,
fDATA = 122.88 MSPS, 4× Interpolation, fDAC/4 Modulation