AD9558 datasheet(23/104 Pages) AD

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Data Sheet

AD9558

Rev. A | Page 23 of 104

0.5

1.0

1.5

2.0

2.5

3.0

3.5

304050607080

FREQUENCY (MHz)

Figure 19. Amplitude vs. Toggle Rate with 10 pF Load,

3.3 V (Weak Mode) CMOS

100

105

110

250

500

750

1000

1250

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)

100

200

300

400

500

600

700

800

FREQUENCY (MHz)

OUTPUT CHANNEL 0 OR 3:

LVDS DRIVER ENABLED

OUTPUT CHANNEL 1 OR 2:

ONE LVDS DRIVER ENABLED

OUTPUT CHANNEL 1 OR 2:

BOTH LVDS DRIVERS ENABLED

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)

100

150

200

FREQUENCY (MHz)

1.8V CMOS MODE

3.3V CMOS STRONG MODE

3.3V CMOS WEAK MODE

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

0.2

0.4

0.6

0.8

1.0

–1

01234

TIME (ns)

Figure 23. Output Waveform, HSTL (400 MHz)

–0.4

–0.3

–0.2

–0.1

0.1

0.2

0.3

0.4

–1

1234

TIME (ns)

Figure 24. Output Waveform, LVDS (400 MHz)

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