AD9779 Analog Devices, AD9779 Datasheet - Page 18

• 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
Figure 25. IMD Performance vs. Full-Scale Output Current, 4× Interpolation,
REF 0dBm
*PEAK
Log
10dB/
LGAV
51
W1
S3
£(f):
FTUN
SWP
START 1.0MHz
*RES BW 20kHz
Figure 24. IMD Performance vs. Digital Full-Scale Input, 4× Interpolation,
S2
FC
AA
Figure 26. AD9779 Single Tone, 4× Interpolation, f
100
100
95
90
85
80
75
70
65
60
55
50
95
90
85
80
75
70
65
60
55
50
0
0
30mA
40
40
–6dBFS
80
80
*ATTEN 20dB
0dBFS
VBW 20kHz
120
20mA
120
f
f
DATA
DATA
–3dBFS
10mA
f
OUT
160
160
= 200 MSPS
= 200 MSPS
f
f
= 30 MHz
OUT
OUT
200
200
(MHz)
(MHz)
SWEEP 1.203s (601 pts)
240
240
280
280
STOP 400.0MHz
DC COUPLED
EXT REF
DATA
320
320
= 100 MSPS,
360
360
400
400
Rev. A | Page 18 of 56
Figure 28. AD9779 Noise Spectral Density vs. Digital Full-Scale of Single-Tone
REF 0dBm
*PEAK
Log
10dB/
LGAV
51
W1
S3
£(f):
FTUN
SWP
START 1.0MHz
*RES BW 20kHz
S2
FC
AA
Figure 29. AD9779 Noise Spectral Density vs. f
–150
–154
–158
–162
–166
–170
–142
–146
–150
–154
–158
–162
–166
–170
Figure 27. AD9779 Two-Tone Spectrum, 4× Interpolation,
0
0
Input, f
f
with 500 kHz Spacing, f
DATA
20
= 100 MSPS, f
*ATTEN 20dB
20
DATA
f
VBW 20kHz
DAC
= 200 MSPS, 2× Interpolation
= 200MSPS
40
0dBFS
f
OUT
f
OUT
40
OUT
= 30 MHz, 35 MHz
(MHz)
f
–6dBFS
(MHz)
DAC
DATA
SWEEP 1.203s (601 pts)
60
= 800MSPS
= 200 MSPS
f
DAC
60
STOP 400.0MHz
DAC
DC COUPLED
= 400MSPS
EXT REF
, Eight-Tone Input
–3dBFS
80
80
100