AD768 Analog Devices, AD768 Datasheet - Page 9

• Manufacturer Part Number: AD768
• Description: 16-Bit, 30 MSPS D/A Converter
• Manufacturer: Analog Devices

Specifications of AD768

• Resolution (bits): 16bit
• Dac Update Rate: 30MSPS
• Dac Settling Time: 25ns
• Max Pos Supply (v): +5.25V
• Single-supply: No
• Dac Type: Current Out
• Dac Input Format: Par

REV. B
Figure 15. THD vs. Clock Frequency
at F
–0.9405
–0.9415
–0.9424
–0.9433
–0.9443
–0.9453
–0.9462
–0.9472
–0.9481
–0.9498
–0.9500
Figure 18. SFDR (Within a Window)
vs. F
–86
–82
–78
–74
–70
–66
–62
–58
–54
–50
OUT
–80
–75
–70
–65
–60
–55
–50
12
OUT
Figure 12. Settling Time
4
= 1 MHz
14 16 18 20 22
CLOCK = 10MHz
5 6 7 8 9 10
1
FREQUENCY – MHz
FREQUENCY – MHz
TIME – ns
CLOCK = 20MHz
24
R
V
OUT
L
26 28 30 32
R
V
= 50
CLOCK = 30MHz
L
OUT
= 0 TO –1V
= 50
20
= 0 TO –1V
30
34
10
40
36
1.00
0.90
0.80
0.60
0.50
0.40
0.30
0.20
0.10
0.70
0.05
0.025
Figure 13. Glitch Impulse at Major
Carry
–100
–0.470
–0.472
–0.474
–0.476
–0.478
–0.480
–0.482
–20
–40
–60
–80
–80
–75
–70
–65
–60
–55
–50
0
0.1
0.01
Figure 16. Typical Spectral
Performance
Figure 19. THD vs. F
CLOCK = 20MHz
1
CLOCK = 30MHz
CLOCK = 1MHz
FREQUENCY – MHz
FREQUENCY – MHz
0.1
CLOCK = 40MHz
–9–
2
TIME – 2ns/Div
CLOCK = 10MHz
F
AMPLITUDE = 0dBm
OUTPUT IOUTB
R
OUT
L
= 50
Typical Performance Curves––AD768
= 1.002MHz
CLOCK = 10MHz
3
R
V
L
OUT
1
= 50
= 0 TO –1V
OUT
4
10
5
–100
–100
–20
–40
–60
–80
–0.2
–0.4
–0.6
–0.8
–1.0
–20
–40
–60
–80
Figure 20. Intermodulation
Distortion
0.2
0.0
0
10k
0
150
Figure 17. Typical SFDR
(With a Window)
Figure 14. Rise and Fall
Characteristics
190
FREQUENCY – Hz
FREQUENCY – Hz
TIME – 5ns/Div
230
1.0M
CLOCK = 10MHz
F
AMPLITUDE = 0dBm
OUT
270
CLOCK = 10 MHz
F
F
AMPLITUDE = –6.0 dB FS
OUTPUT IOUTB
R
R
V
OUT1
OUT2
L
OUT
L
= 50
AD768
= 1.002MHz
= 50
= 240 kHz
= 260 kHz
= 0 TO –1V
310
PER TONE
2.0M
350