Datasheet

Data Sheet AD9558
Rev. B | Page 23 of 104
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0 10
20
30
40
50
60
70
80
PEAK-TO-PEAK AMPLITUDE (V)
FREQUENCY (MHz)
09758-119
Figure 19. Amplitude vs. Toggle Rate with 10 pF Load,
3.3 V (Weak Mode) CMOS
09758-120
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
0 250
500
750
1000 1250
POWER (mW)
FREQUENCY (MHz)
OUTPUT CHANNEL 0 OR 3:
HSTL DRIVER ENABLED
OUTPUT CHANNEL 1 OR 2:
ONE HSTL DRIVER ENABLED
OUTPUT CHANNEL 1 OR 2:
BOTH HSTL DRIVERS ENABLED
Figure 20. Power Consumption vs. Frequency,
HSTL Mode (Single Channel) on 1.8 V Output Driver Power Supply Only
(Pin 12, Pin 17, Pin 22, and Pin29)
0
5
10
15
20
25
30
35
40
45
50
55
60
65
0 100 200 300 400 500 600 700 800
POWER (mW)
FREQUENCY (MHz)
OUTPUT CHANNEL 0 OR 3:
LVDS DRIVER ENABLED
OUTPUT CHANNEL 1 O
R 2:
ONE LVDS DRIVER ENABLED
OUTPUT CHANNEL 1 OR 2:
BOTH LVDS DRIVERS ENABLED
09758-121
Figure 21. LVDS Power Consumption vs. Frequency on 1.8 V Output Driver
Power Supply Only (Pin 12, Pin 17, Pin 22, and Pin 29)
0
10
20
30
40
50
60
70
0 50 100 150 200
POWER (mW)
FREQUENCY (MHz)
1.8V CMOS MODE
3.3V CMOS STRONG MODE
3.3V CMOS WEAK MODE
09758-122
Figure 22. Power Consumption vs. Frequency, One CMOS Driver on Output
Driver Power Supply Only (Pin 12, Pin 17, Pin 22, and Pin 29) for 1.8 V CMOS Mode,
or on Pin 25 and Pin 26 for 3.3 V CMOS Mode
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
1.0
–1
0 1
2
3 4 5
DIFFERENTIA
L AMPLITUDE (V)
TIME (ns)
09758-123
Figure 23. Output Waveform, HSTL (400 MHz)
–0.4
–0.3
–0.2
–0.1
0
0.1
0.2
0.3
0.4
–1
0 1 2 3 4
DIFFERENTIAL AMPLITUDE (V)
TIME (ns)
09758-124
Figure 24. Output Waveform, LVDS (400 MHz)