SM802108 datasheet(6/11 Pages) MICREL

6 / 11 page

Micrel, Inc.

SM802108

January 2011

M9999-012111-A

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

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 = 50Ω to VDDO − 2V

Symbol

Parameter

Condition

Min.

Typ.

Max.

Units

FOUT1

Output Frequency 1

156.25

MHz

FOUT2

Output Frequency 2

125

Ppm

Output ppm Variation

Crystal reference. Note 6

−50

ppm

FREF

Reference Input Frequency

MHz

TR/TF

LVPECL Output Rise/Fall Time

20% – 80%

175

350

ODC

Output Duty Cycle

TSKEW

Output-to-Output Skew

Within bank. Note 7

TLOCK

PLL Lock Time

Tjit(∅)

RMS Phase Jitter

(8)

156.25MHz

Integration Range (1.875MHz – 20MHz)

Integration Range (12kHz – 20MHz)

125MHz

Integration Range (1.875MHz – 20MHz)

Integration Range (12kHz – 20MHz)

110

250

110

250

Spurious Noise Components

6.25MHz

25MHz

-73

-58

dBc

Notes:

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

Crystal tolerance at room less than +/- 15ppm, over temp less than +/- 20ppm.

Defined as skew between outputs at the same supply voltage and with equal load conditions and same frequency; Measured at the output

differential crossing points.

Measured using 25MHz crystal as the input reference source.

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