AD9776A Analog Devices, AD9776A Datasheet - Page 21

• Manufacturer Part Number: AD9776A
• Description: Dual 12-Bit, 1 GSPS, Digital-to-Analog Converter
• Manufacturer: Analog Devices

Specifications of AD9776A

• Resolution (bits): 12bit
• Dac Update Rate: 1GSPS
• Dac Settling Time: n/a
• Max Pos Supply (v): +3.47V
• Single-supply: No
• Dac Type: Current Out
• Dac Input Format: Par

100
–0.2
–0.4
–0.6
–0.8
–1.0
–0.5
–1.0
–1.5
90
80
70
60
50
0.6
0.4
0.2
1.5
1.0
0.5
0
0
0
0
0
40
2k
4× 100MSPS
80
Figure 37. AD9778A Typical DNL
Figure 38. AD9778A IMD vs. f
Figure 36. AD9778A Typical INL
2k
4k
120
4× Interpolation
4× 150MSPS
6k
160
4k
f
OUT
200
CODE
CODE
8k
(MHz)
240
6k
10k
280
OUT
12k
4× 200MSPS
,
320
8k
14k
360
400
10k
16k
Rev. B | Page 21 of 56
REF –25.39dBm
*AVG
log
10dB
PAVG
10
W1 S2
CENTER 143.88MHz
*RES BW 30kHz
RMS RESULTS
CARRIER POWER
–12.74dBm/
3.84000MHz
100
–60
–70
–80
–90
90
80
70
60
50
4× Interpolation, f
f
0
0
DATA
Figure 40. AD9778A ACLR, Single Carrier W-CDMA,
THIRD ADJACENT
= 122.88 MSPS, 4× Interpolation, f
25
Figure 39. AD9778A In-Band SFDR vs. f
FREQ OFFSET
5.000MHz
10.00MHz
15.00MHz
20
50
CHANNEL
AD9776A/AD9778A/AD9779A
Figure 41. AD9778A ACLR,
DATA
f
75
*ATTEN 4dB
DATA
VBW 300kHz
2× Interpolation
= 122.88 MSPS, Amplitude = −3 dBFS
FIRST ADJACENT CHANNEL
REF BW
3.884MHz
3.840MHz
3.840MHz
100
= 160MSPS
40
f
f
OUT
OUT
125
(MHz)
(MHz)
dBc
–76.49
–80.13
–80.90
SECOND ADJACENT
CHANNEL
f
LOWER
DATA
150
60
SWEEP 162.2ms (601 pts)
dBm
–89.23
–92.87
–93.64
= 250MSPS
f
DAC
175
DATA
/4 Modulation
dBc
–76.89
–80.02
–79.53
= 200MSPS
200
80
OUT
UPPER
SPAN 50MHz
,
dBm
–89.63
–92.76
–92.27
225
100
250