RF Components - Frequency Control OP4008B 669.327 MHz SAW Clock - Optical Timing - RFM offers a full set of custom embedded wireless networking solutions like Zigbee wireless mesh sensor networks, RF modules, IC transceiver, IC transmitters and IC receivers. RFM, Inc. manufactures low power wireless and RF radio modules, wireless mesh nodes for distributed sensing on distributed sensor networks. Low Power radio, n../arrowband and short range devices, front end saw filters, active RFID, RFIC, coupled resonator filters, single silicon chips in the 70MHZ and 300-1000Mhz range.

OP4008B

669.327 MHz Clock - Optical Timing

� Quartz SAW Stabilized and Filtered �Diff Sine� Technology
� Fundamental-Mode Oscillation at 669.327 MHz
� Voltage Tunable for Phase Lock Loop Operations
� Optical Timing Reference for Forward Error Correction Applications

download data sheet Rev Date 02/08/10

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Features
Specs
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The output of this device is generated and filtered by narrow-band quartz SAW elements at 669.327 MHz. The configuration of this clock provides a pure signal for optical timing applications in noisy signal environments. The Q/Q differential output swing of �1 volt about 0 Vdc has symmetry better than �1% into loads from 40 to 70 ohms, determined by customer application. The long term frequency accuracy is set by an external reference source allowing this device to complete a Phase Lock Loop design without the usual noise and jitter problems associated with PLL�s.


Electrical Characteristics

Characteristic	Symbol	Minimum	Typical	Maximum	Units
Operating Frequency Absolute Frequency	fO		669.327		MHz
Tune Range		�100			ppm
Tune Voltage		0		+3	V
Tuning Linearity			�3		%
Tuning Sensitivity	df/dv	140		300	ppm/V
Modulation Bandwidth		125	265		kHz
Q and Q Output Voltage into 50 Ohm (VSWR?1.2)	VO	0.60		1.1	VP-P
Operating Load VSWR				2:1	VP-P
Symmetry		49		51	%
Harmonic Spurious				-30	dBc
Nonharmonic Spurious				-60	dBc
Phase Noise @100 Hz offset			-75		dBc/Hz
Phase Noise @ 1 kHz offset			-105		dBc/Hz
Phase Noise @ 10 k offset			-125		dBc/Hz
Noise Floor			-155		dBc/Hz
Q and Q Jitter RMS Jitter			2		psP-P
No Noise on VCC			12		psP-P
with 200 mVP-P noise added from 1 MHz to � fO			12		psP-P
Output DC Resistance (between Q & Q)		50			KOhm
DC Power Supply Operating Voltage	VCC	3.13	3.3 5.0	5.25	Vdc
Operating Current	ICC			70	mA
Operating Case Temperature	TC	-40		+85	�C