SM802121 데이터 시트보기 (PDF) - Micrel

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SM802121

ClockWorks™ 10GbE (156.25MHz), Ultra-Low Jitter, LVPECL Frequency Synthesizer

Micrel 

Micrel, Inc.

SM802121

AC Electrical Characteristics(4, 5)

VDD = VDDO = 3.3V 5% or 2.5V 5%

VDD = 3.3V 5%, VDDO= 3.3V 5% or 2.5V 5%

TA = 40C to 85C. RL = 50Ω to VDDO  2V

Symbol

Parameter

Condition

FOUT

FREF

Output Frequency

Reference Input Frequency

TR/TF

LVPECL Output Rise/Fall Time 20%  80%

ODC

Output Duty Cycle

TLOCK

PLL Lock Time

Tjit()

RMS Phase Jitter(6)

156.25MHz

Integration Range (1.875MHz  20MHz)

Integration Range (12kHz  20MHz)

Spurious Noise Components

6.25MHz

Min.

80

48

Typ.

156.25

25

175

50

110

250

75

Max.

350

52

20

Units

MHz

MHz

ps

%

ms

fs

dBc

Notes:

5. All phase-noise measurements were taken with an Agilent 5052B phase-noise system.

6. Measured using a 25MHz crystal as the input reference source. If using an external reference input, use a low phase noise source. With an

external reference, the phase noise will follow the input source phase noise up to about 1MHz offset.

January 2012

6

M9999-011212-A

hbwhelp@micrel.com or (408) 955-1690

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