AD9742 Analog Devices, AD9742 Datasheet - Page 11

• Manufacturer Part Number: AD9742
• Manufacturer: Analog Devices

Specifications of AD9742

• Resolution (bits): 12bit
• Dac Update Rate: 210MSPS
• Dac Settling Time: 11ns
• Max Pos Supply (v): +3.6V
• Single-supply: No
• Dac Type: Current Out
• Dac Input Format: Par

–100
–10
–20
–30
–40
–50
–60
–70
–80
–90
90
85
80
75
70
65
60
55
50
0
–40
1
Figure 18. SFDR vs. Temperature @ 165 MSPS, 0 dBFS
6
–20
0.1µF
Figure 19. Single-Tone SFDR
11
CLOCK
0
V
19MHz
49MHz
TEMPERATURE (°C)
FREQUENCY (MHz)
REFIO
R
4MHz
2kΩ
SET
16
20
3.3V
I
REF
21
f
f
SFDR = 79dBc
AMPLITUDE = 0dBFS
CLOCK
OUT
40
REFIO
FS ADJ
DVDD
DCOM
CLOCK
= 15.0MHz
26
SLEEP
= 78MSPS
1.2V REF
Figure 22. Simplified Block Diagram (SOIC/TSSOP Packages)
60
REFLO
34MHz
31
SEGMENTED SWITCHES
FOR DB11–DB3
DIGITAL DATA INPUTS (DB11–DB0)
80
36
150pF
Rev. B | Page 11 of 32
LATCHES
CURRENT SOURCE
ARRAY
PMOS
3.3V
SWITCHES
AVDD
LSB
–100
–100
–10
–20
–30
–40
–50
–60
–70
–80
–90
–10
–20
–30
–40
–50
–60
–70
–80
–90
0
0
AD9742
1
1
ACOM
IOUTA
IOUTB
6
6
MODE
IOUTB
11
11
Figure 20. Dual-Tone SFDR
Figure 21. Four-Tone SFDR
FREQUENCY (MHz)
FREQUENCY (MHz)
IOUTA
16
16
V
DIFF
V
R
50Ω
OUTB
LOAD
= V
21
21
OUTA
f
f
f
SFDR = 77dBc
AMPLITUDE = 0dBFS
CLOCK
OUT1
OUT2
f
f
f
f
f
SFDR = 75dBc
AMPLITUDE = 0dBFS
CLOCK
OUT1
OUT2
OUT3
OUT4
– V
26
26
= 15.0MHz
= 15.4MHz
V
R
50Ω
= 15.0MHz
= 15.4MHz
= 15.8MHz
= 16.2MHz
OUTB
= 78MSPS
OUTA
LOAD
= 78MSPS
31
31
AD9742
36
36