AD9779 Analog Devices, AD9779 Datasheet - Page 20

• Manufacturer Part Number: AD9779
• Description: Dual 16-Bit, 1 GSPS, Digital-to-Analog Converter
• Manufacturer: Analog Devices

Specifications of AD9779

• Resolution (bits): 16bit
• Dac Update Rate: 1GSPS
• Dac Settling Time: n/a
• Max Pos Supply (v): +3.47V
• Single-supply: Yes
• Dac Type: Current Out
• Dac Input Format: Par

AD9776/AD9778/AD9779
REF –25.28dBm
*AVG
Log
10dB/
PAVG
10
W1 S2
CENTER 143.88MHz
*RES BW 30kHz
RMS RESULTS
CARRIER POWER
–12.49dBm/
3.84000MHz
REF –30.28dBm
*AVG
Log
10dB/
PAVG
10
W1 S2
CENTER 151.38MHz
*RES BW 30kHz
TOTAL CARRIER POWER –12.61dBm/15.3600MHz
REF CARRIER POWER –17.87dBm/3.84000MHz
1 –17.87dBm
2 –20.65dBm
3 –18.26dBm
4 –18.23dBm
Figure 35. AD9779 Multicarrier WCDMA Signal, 4× Interpolation,
Figure 34. AD9779 WCDMA Signal, 4× Interpolation,
FREQ OFFSET
5.000MHz
10.00MHz
15.00MHz
FREQ OFFSET
5.000MHz
10.00MHz
15.00MHz
f
f
DATA
DAC
*ATTEN 4dB
*ATTEN 4dB
=122.88 MSPS, f
=122.88 MSPS, f
VBW 300kHz
VBW 300kHz
REF BW
3.840MHz
3.840MHz
3.840MHz
INTEG BW
3.840MHz
3.840MHz
3.840MHz
dBc
–76.75
–80.94
–79.95
dBc
–67.70
–70.00
–71.65
LOWER
DAC
DAC
LOWER
SWEEP 162.2ms (601 pts)
SWEEP 162.2ms (601 pts)
/4 Modulation
/4 Modulation
dBm
–89.23
–93.43
–92.44
dBm
–85.57
–97.87
–99.52
dBc
–77.42
–80.47
–78.96
dBc
–67.70
–69.32
–71.00
UPPER
SPAN 50MHz
SPAN 50MHz
UPPER
dBm
–89.91
–92.96
–91.45
EXT REF
EXT REF
dBm
–85.57
–87.19
–88.88
Rev. A | Page 20 of 56
–0.5
–1.0
–1.5
–0.2
–0.4
–0.6
–0.8
–1.0
1.5
1.0
0.5
0.6
0.4
0.2
0
0
0
0
2k
2k
Figure 37. AD9778 Typical DNL
Figure 36. AD9778 Typical INL
4k
6k
4k
CODE
CODE
8k
6k
10k
12k
8k
14k
10k
16k