SM802123UMGTR Ver la hoja de datos (PDF) - Micrel

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componentes Descripción

Fabricante

SM802123UMGTR

ClockWorks™ 125MHz/25MHz Ultra-Low Jitter, LVCMOS Frequency Synthesizer

Micrel 

Micrel, Inc.

SM802123

REF_IN DC Electrical Characteristics(4)

VDD = 3.3V ±5%, or 2.5V ±5%, TA = −40°C to +85°C

Symbol Parameter

Condition

VIH

Input High Voltage

VIL

Input Low Voltage

IIN

Input Current

VIN = 0V to VDD

Min.

1.1

−0.3

−5

Typ.

Max.

VDD + 0.3

0.6

5

Units

V

V

μA

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/2

Symbol Parameter

Condition

FOUT

Output Frequency

Q1 – /Q8

Q9 – Q16

TR/TF

LVCMOS Output Rise/Fall

Time

20% – 80%, Fig. 2

ODC

Output Duty Cycle

TLOCK

Tjit(∅)

PLL Lock Time

RMS Phase Jitter (6)

(Output = 25MHz)

RMS Phase Jitter (6)

(Output = 125MHz)

Integration Range:(12kHz – 5MHz)

5MHz limited by phase-noise system.

Integration Range:(12kHz – 20MHz)

Integration Range:(1.875MHz – 20MHz)

Spurious Noise Components 25MHz

Min

Typ

Max Units

25

MHz

125

100

200

500

ps

45

50

55

%

20

ms

315

fs

340

fs

115

fs

−64

dBc

Notes:

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

2. REF_IN driven with a low-noise source ClockWorksTM SM802001 programmed for a 25MHz CMOS output. Phase noise will track the input phase

noise up to about 1MHz offset frequency.

January 2012

5

M9999-012312-A

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

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