SM802116 데이터 시트보기 (PDF) - Micrel

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SM802116

ClockWorks™ Fibre Channel (106.25MHz, 212.5MHz) Ultra-Low Jitter, LVDS Frequency Synthesizer

Micrel 

Micrel, Inc.

SM802116

AC Electrical Characteristics(4, 5)

VDD = VDDO1/2 = 3.3V ±5% or 2.5V ±5%

VDD = 3.3V ±5%, VDDO1/2 = 3.3V ±5% or 2.5V ±5%

TA = −40°C to +85°C. RL = 100Ω across Q and /Q.

Symbol

Parameter

Condition

FOUT1

FOUT2

FREF

TR/TF

ODC

Output Frequency 1

Output Frequency 2

Reference Input Frequency

LVDS Output Rise/Fall Time

Output Duty Cycle

FSEL=1

FSEL=0

20% – 80%

TSKEW

TLOCK

Output-to-Output Skew

PLL Lock Time

Note 6

106.25MHz

Integration Range (637kHz – 10MHz)

Integration Range (12kHz – 20MHz)

Tjit(∅)

RMS Phase Jitter(7)

212.5MHz

Integration Range (637kHz – 10MHz)

Integration Range (12kHz – 20MHz)

Min.

100

48

Typ.

106.25

212.5

26.5625

220

50

Max.

400

52

45

20

190

250

180

240

Units

MHz

MHz

MHz

ps

%

ps

ms

fs

Spurious Noise Components

26.5625MHz using 106.25MHz

26.5625MHz using 212.5MHz

−90

dBc

−85

Notes:

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

6. Defined as skew between outputs at the same supply voltage and with equal load conditions; Measured at the output differential crossing points.

7. Measured using 26.5625MHz 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.

July 2011

6

M9999-071811-A

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

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