AD9912ASLASHPCBZ datasheet(15/40 Pages) AD

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AD9912

Rev. F | Page 15 of 40

200

400

600

800

FREQUENCY (MHz)

650

600

550

500

450

NOM SKEW 25°C, 1.8V SUPPLY

WORST CASE (SLOW SKEW 90°C, 1.7V SUPPLY)

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 27. HSTL Output Driver Single-Ended Peak-to-Peak Amplitude vs.

Toggle Rate (100 Ω Across Differential Pair)

Figure 30. Typical HSTL Output Waveform, Nominal Conditions,

DC-Coupled, Differential Probe Across 100 Ω load

1020

304

FREQUENCY (MHz)

2.5

2.0

1.5

1.0

0.5

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%

NOM SKEW 25°C, 1.8V SUPPLY (20pF)

WORST CASE (SLOW SKEW 90°C,

1.7V SUPPLY (20pF))

Figure 31. Typical CMOS Output Driver Waveform (@ 1.8 V),

Nominal Conditions, Estimated Capacitance = 5 pF

Figure 28. 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, 1.8V SUPPLY (20pF)

WORST CASE (SLOW SKEW 90°C,

3.0V SUPPLY (20pF))

2030

405

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 32. CMOS Output Driver Waveform (@ 3.3 V),

Nominal Conditions, Estimated Capacitance = 5 pF

Figure 29. CMOS Output Driver Peak-to-Peak Amplitude vs. Toggle Rate

(AVDD3 = 3.3 V) with 20 pF Load

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