AD9789 Analog Devices, AD9789 Datasheet - Page 15

• Manufacturer Part Number: AD9789
• Description: 14-Bit, 2400 MSPS RF DAC with 4-Channel Signal Processing
• Manufacturer: Analog Devices

Specifications of AD9789

• Resolution (bits): 14bit
• Dac Update Rate: 2.4GSPS
• Dac Settling Time: 13ns
• Max Pos Supply (v): +3.47V
• Single-supply: No
• Dac Type: Current Out
• Dac Input Format: LVDS,Par

Figure 26. ACLR Performance for CMOS and LVDS Interfaces, 1-Channel QAM,
2-Channel QAM, f
f
f
Figure 28. Third-Order Harmonic Performance vs. f
OUT
OUT
= 840 MHz, f
= 800 MHz, f
Figure 27. ACLR Performance over Temperature, 2-Channel QAM,
–10
–20
–30
–40
–50
–60
–70
–80
–90
–55
–60
–65
–70
–75
–80
–85
–15
–25
–35
–45
–55
–65
–75
–85
–5
0
(DOCSIS SPEC Is −70 dBc; Harmonic Exception Is −63 dBc)
0
0
50
100
100
DOCSIS3
CMOS
LVDS
DAC
DAC
DAC
DOCSIS3
25°C
65°C
85°C
250
200
200
= 2.4 GHz, Full-Scale Current = 20 mA, Sum Scale = 48
= 2.3 GHz, Full-Scale Current = 25 mA, Sum Scale = 32
= 2.3 GHz, Full-Scale Current = 25 mA, Sum Scale = 32
(DOCSIS SPEC Is −73 dBc)
(DOCSIS SPEC Is −70 dBc)
300
300
FREQUENCY (MHz)
450
FREQUENCY (MHz)
400
400
f
OUT
500
500
(MHz)
650
600
600
700
700
850
OUT
800
800
over Temperature,
DOCSIS3
25°C
65°C
85°C
900 1000
900 1000
1050
Rev. A | Page 15 of 76
Figure 31. Noise Floor vs. f
2-Channel QAM, f
2-Channel QAM, f
f
OUT
Figure 30. Second Harmonic Performance vs. f
= 200 MHz, f
Figure 29. ACLR Performance over Temperature, 2-Channel QAM,
–55
–60
–65
–70
–75
–80
–85
–55
–60
–65
–70
–75
–80
–85
–15
–25
–35
–45
–55
–65
–75
–85
–5
(DOCSIS SPEC Is −70 dBc; Harmonic Exception Is −63 dBc)
(DOCSIS SPEC Is −70 dBc; Harmonic Exception Is −63 dBc)
0
0
50
100
100
DAC
DAC
DAC
250
200
200
= 2.3 GHz, Full-Scale Current = 25 mA, Sum Scale = 32
= 2.3 GHz, Full-Scale Current = 25 mA, Sum Scale = 32
= 2.3 GHz, Full-Scale Current = 25 mA, Sum Scale = 32
OUT
(DOCSIS SPEC Is −70 dBc)
300
300
over Temperature (ACLR Measured Beyond 30 MHz),
450
FREQUENCY (MHz)
400
400
f
f
OUT
OUT
500
500
(MHz)
(MHz)
650
600
600
700
700
OUT
850
over Temperature,
800
800
DOCSIS3
25°C
65°C
85°C
DOCSIS3
25°C
65°C
85°C
DOCSIS3
25°C
65°C
85°C
900 1000
900 1000
1050
AD9789