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