AD9549APCBZ datasheet(15/76 Pages) AD

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AD9549

Rev. D | Page 15 of 76

200

400

600

800

FREQUENCY (MHz)

650

600

550

500

450

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)

FREQUENCY (MHz)

2.5

2.0

1.5

1.0

0.5

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

100

150

FREQUENCY (MHz)

3.5

3.0

2.5

2.0

1.5

1.0

0.5

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

0.5

1.0

1.5

2.0

2.5

TIME (ns)

0.4

0.6

0.2

–0.2

–0.4

–0.6

FREQUENCY= 600MHz

TRISE (20→80%) = 104ps

TFALL (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

100

TIME (ns)

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

–0.2

FREQUENCY= 20MHz

TRISE (20→80%) = 5.5ns

TFALL (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

TIME (ns)

3.3

2.8

2.3

1.8

1.3

0.8

0.3

–0.2

FREQUENCY= 40MHz

TRISE (20→80%) = 2.25ns

TFALL (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, fOUT = 20 MHz

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