AD9778 Analog Devices, AD9778 Datasheet - Page 19

• Manufacturer Part Number: AD9778
• Description: Dual 14-Bit, 1 GSPS, Digital-to-Analog Converter
• Manufacturer: Analog Devices

Specifications of AD9778

• Resolution (bits): 14bit
• 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

Figure 31. AD9779 ACLR for First Adjacent Band WCDMA, 4× Interpolation,
f
DATA
= 122.88 MSPS, On-Chip Modulation Translates Baseband Signal to IF
–150
–154
–158
–162
–166
–170
–55
–60
–65
–70
–75
–80
–85
–90
0
0
Figure 30. AD9779 Noise Spectral Density vs. f
0dBFS
20
40
f
DAC
20
Single-Tone Input at −6 dBFS
60
= 200MSPS
80 100 120 140 160 180 200 220 240
–3dBFS
40
f
f
OUT
OUT
(MHz)
(MHz)
f
DAC
f
60
DAC
= 800MSPS
= 400MSPS
0dBFS – PLL ON
–6dBFS
80
DAC
,
100
260
Rev. A | Page 19 of 56
Figure 33. AD9779 ACLR for Third Adjacent Band WCDMA, 4× Interpolation,
f
DATA
Interpolation, f
= 122.88 MSPS, On-Chip Modulation Translates Baseband Signal to IF
Figure 32. AD9779 ACLR for Second Adjacent Band WCDMA, 4×
–55
–60
–65
–70
–75
–80
–85
–90
–55
–60
–65
–70
–75
–80
–85
–90
0
0
0dBFS
20
20
40
40
0dBFS
DATA
–6dBFS
= 122.88 MSPS. On-Chip Modulation Translates
60
60
Baseband Signal to IF
80 100 120 140 160 180 200 220 240
80 100 120 140 160 180 200 220 240
AD9776/AD9778/AD9779
–6dBFS
f
f
OUT
OUT
(MHz)
(MHz)
–3dBFS
0dBFS – PLL ON
0dBFS – PLL ON
–3dBFS
260
260