Datasheet

AD9549
Rev. D | Page 15 of 76
06744-012
0 200 400 600 800
FREQUENCY (MHz)
650
600
550
500
450
AMPLITUDE (mV)
NOM SKEW 25°C, 1.8V SUPPLY
SLOW SKEW 90°C, 1.7V SUPPLY
Figure 12. HSTL Output Driver Single-Ended Peak-to-Peak Amplitude vs.
Toggle Rate (100 Ω Across Differential Pair)
06744-013
0 10 20 30 40
FREQUENCY (MHz)
2.5
2.0
1.5
1.0
0.5
0
AMPLITUDE (V)
NOM SKEW 25°C, 1.8V SUPPLY (20pF)
SLOW SKEW 90°C, 1.7V SUPPLY (20pF)
Figure 13. CMOS Output Driver Peak-to-Peak Amplitude vs. Toggle Rate
(AVDD3 = 1.8 V) with 20 pF Load
06744-014
0 50 100 150
FREQUENCY (MHz)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
AMPLITUDE (V)
NOM SKEW 25°C, 3.3V SUPPLY (20pF)
SLOW SKEW 90°C, 3.0V SUPPLY (20pF)
Figure 14. CMOS Output Driver Peak-to-Peak Amplitude vs. Toggle Rate
(AVDD3 = 3.3 V) with 20 pF Load
06744-015
0 0.5 1.0 1.5 2.0 2.5
TIME (ns)
0.4
0.6
0.2
0
–0.2
–0.4
–0.6
AMPLITUDE (V)
FREQUENCY= 600MHz
T
RISE
(20→80%) = 104ps
T
FALL
(80→20%) = 107ps
V p-p = 1.17V DIFF.
DUTY CYCLE = 50%
Figure 15. Typical HSTL Output Waveform, Nominal Conditions,
DC-Coupled, Differential Probe Across 100 Ω load
06744-016
0 20 40 60 80 100
TIME (ns)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–0.2
AMPLITUDE (V)
FREQUENCY= 20MHz
T
RISE
(20→80%) = 5.5ns
T
FALL
(80→20%) = 5.9ns
V p-p = 1.8V
DUTY CYCLE = 53%
Figure 16. Typical CMOS Output Driver Waveform (@ 1.8 V),
Nominal Conditions, Estimated Capacitance: 5 pF
06744-017
0 10 20 30 40 50
TIME (ns)
3.3
2.8
2.3
1.8
1.3
0.8
0.3
–0.2
AMPLITUDE (V)
FREQUENCY= 40MHz
T
RISE
(20→80%) = 2.25ns
T
FALL
(80→20%) = 2.6ns
V p-p = 3.3V
DUTY CYCLE = 52%
Figure 17. CMOS Output Driver Waveform (@ 3.3 V), Nominal Conditions,
Estimated Capacitance: 5 pF, f
OUT
= 20 MHz