AD9779A-EBZ Analog Devices Inc, AD9779A-EBZ Datasheet - Page 18

• Manufacturer Part Number: AD9779A-EBZ
• Description: Dual 16B, 1.0 GSPS TxDAC
• Manufacturer: Analog Devices Inc
• Series: TxDAC®r

Specifications of AD9779A-EBZ

• Design Resources: Interfacing ADL5370 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0016) Interfacing ADL5371 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0017) Interfacing ADL5372 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0018) Interfacing ADL5373 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0019) Interfacing ADL5374 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0020) Interfacing ADL5375 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0021)
• Number Of Dac's: 2
• Number Of Bits: 16
• Outputs And Type: 2, Differential
• Sampling Rate (per Second): 1G
• Data Interface: Serial
• Dac Type: Current
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: AD9779A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Settling Time: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD9776A/AD9778A/AD9779A
Figure 31. AD9779A ACLR for First Adjacent Band W-CDMA, 4× Interpolation,
f
Figure 30. AD9779A Noise Spectral Density vs. f
DATA
REF –25.28dBm
*AVG
Log
10dB
PAVG
10
W1 S2
CENTER 143.88MHz
*RES BW 30kHz
RMS RESULTS
CARRIER POWER
–12.49dBm/
3.84000MHz
= 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 32. AD9779A W-CDMA Signal, 4× Interpolation,
20
FREQ OFFSET
5.000MHz
10.00MHz
15.00MHz
40
f
DATA
f
with a Single Tone Input at −6 dBFS
DAC
20
60
= 122.88 MSPS, f
*ATTEN 4dB
= 200MSPS
0dBFS, PLL ENABLED
VBW 300kHz
80
REF BW
3.840MHz
3.840MHz
3.840MHz
100
40
f
f
OUT
OUT
120
dBc
–76.75
–80.94
–79.95
–6dBFS, PLL DISABLED
(MHz)
(MHz)
f
DAC
140
LOWER
DAC
0dBFS, PLL DISABLED
SWEEP 162.2ms (601 pts)
/4 Modulation
f
60
DAC
dBm
–89.23
–93.43
–92.44
= 800MSPS
160
–3dBFS, PLL DISABLED
DAC
= 400MSPS
180
dBc
–77.42
–80.47
–78.96
over Output Frequency
UPPER
200
SPAN 50MHz
80
dBm
–89.91
–92.96
–91.45
EXT REF
220
240
100
260
Rev. A | Page 18 of 60
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
Interpolation, f
Figure 34. AD9779A ACLR for Third Adjacent Band W-CDMA, 4×
Figure 33. AD9779A ACLR for Second Adjacent Band W-CDMA,
–55
–60
–65
–70
–75
–80
–85
–90
–55
–60
–65
–70
–75
–80
–85
–90
4× Interpolation, f
0
0
On-Chip Modulation Translates Baseband Signal to IF
Figure 35. AD9779A Multicarrier W-CDMA Signal,
20
20
FREQ OFFSET
5.000MHz
10.00MHz
15.00MHz
40
40
0dBFS, PLL ENABLED
4× Interpolation, f
DATA
–3dBFS, PLL DISABLED
–3dBFS, PLL DISABLED
60
60
= 122.88 MSPS, On-Chip Modulation Translates
*ATTEN 4dB
VBW 300kHz
Baseband Signal to IF
80
80
DAC
INTEG BW
3.840MHz
3.840MHz
3.840MHz
100
100
= 122.88 MSPS, f
f
f
OUT
OUT
120
120
DATA
(MHz)
(MHz)
dBc
–67.70
–70.00
–71.65
140
140
= 122.88 MSPS;
LOWER
0dBFS, PLL ENABLED
SWEEP 162.2ms (601 pts)
–6dBFS, PLL DISABLED
–6dBFS, PLL DISABLED
160
160
dBm
–85.57
–97.87
–99.52
0dBFS, PLL DISABLED
0dBFS, PLL DISABLED
DAC
180
180
/4 Modulation
dBc
–67.70
–69.32
–71.00
200
200
SPAN 50MHz
UPPER
EXT REF
220
220
dBm
–85.57
–87.19
–88.88
240
240
260
260