AD9572 datasheet(6/20 Pages) AD

No. de pieza	AD9572

Descripción Electrónicos	Fiber Channel/Ethernet Clock Generator IC, PLL Core, Dividers, 7 Clock Outputs

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Fabricante Electrónico	AD [Analog Devices]

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AD9572

Rev. 0 | Page 6 of 20

CLOCK OUTPUTS

Typical (typ) is given for VS = 3.3 V ± 10%, TA = 25°C, unless otherwise noted. Minimum (min) and maximum (max) values are given

over full VS and TA (−40°C to +85°C) variation.

Table 6.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

LVPECL CLOCK OUTPUTS

Output Frequency

156.25

MHz

Output High Voltage (VOH)

VS − 1.24

VS − 1.05

VS − 0.83

V

Output Low Voltage (VOL)

VS − 2.07

VS − 1.87

VS − 1.62

V

Output Differential Voltage (VOD)

700

825

950

mV

Duty Cycle

45

55

%

LVDS CLOCK OUTPUTS

Output Frequency

156.25

MHz

Differential Output Voltage (VOD)

250

350

475

mV

Delta VOD

25

mV

Output Offset Voltage (VOS)

1.125

1.25

1.375

V

Delta VOS

25

mV

Short-Circuit Current (ISA, ISB)

14

24

mA

Output shorted to GND

Duty Cycle

45

55

%

CMOS CLOCK OUTPUTS

Output Frequency

33.33

MHz

Output High Voltage (VOH)

VS − 0.1

V

Sourcing 1.0 mA current

Output Low Voltage (VOL)

0.1

V

Sinking 1.0 mA current

Duty Cycle

42

58

%

TIMING CHARACTERISTICS

Typical (typ) is given for VS = 3.3 V ± 10%, TA = 25°C, unless otherwise noted. Minimum (min) and maximum (max) values are given

over full VS and TA (−40°C to +85°C) variation.

Table 7.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

LVPECL

Termination = 200 Ω to 0 V; CLOAD = 0 pF

Output Rise Time, tRP

480

625

810

ps

20% to 80%, measured differentially

Output Fall Time, tFP

480

625

810

ps

80% to 20%, measured differentially

LVDS

Termination = 100 Ω differential; CLOAD = 0 pF

Output Rise Time, tRL

160

350

540

ps

20% to 80%, measured differentially

Output Fall Time, tFL

160

350

540

ps

80% to 20%, measured differentially

CMOS

Termination = 50 Ω to 0 V; CLOAD = 5 pF

Output Rise Time, tRC

0.25

0.50

2.5

ns

20% to 80%

Output Fall Time, tFC

0.25

0.70

2.5

ns

80% to 20%

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