Datasheet

AD9776A/AD9778A/AD9779A
Rev. B | Page 21 of 56
1.5
0
CODE
INL (14-BIT LSB)
10k
1.0
0.5
0
–0.5
–1.0
–1.5
2k 4k 6k 8k
0
6452-033
Figure 36. AD9778A Typical INL
0.6
0
CODE
DNL (14-BIT LSB)
–0.2
–1.0
16k14k12k10k8k6k4k2k
0.4
0.2
0
–0.4
–0.6
–0.8
06452-034
Figure 37. AD9778A Typical DNL
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
06452-035
Figure 38. AD9778A IMD vs. f
OUT
,
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
06452-036
Figure 39. AD9778A In-Band SFDR vs. f
OUT
,
2× Interpolation
–90
0
250
f
OUT
(MHz)
ACLR (dBc)
–70
–80
–60
25 50 75 100 125 150 175 200 225
FIRST ADJACENT CHANNEL
SECOND ADJACENT
CHANNEL
THIRD ADJACENT
CHANNEL
06452-037
Figure 40. AD9778A ACLR, Single Carrier W-CDMA,
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
0
6452-038
Figure 41. AD9778A ACLR,
f
DATA
= 122.88 MSPS, 4× Interpolation, f
DAC
/4 Modulation