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©2008-2010 by RF Monolithics, Inc.

OP4012B - 2/4/10

• Quartz SAW Stabilized Differential Output Technology

• Very Low Jitter Fundamental-Mode Operation at 644.53125 MHz

• Voltage Tunable for Phase Locked Loop Applications

• Timing Reference for 10G Optical Ethernet Communications Systems

• Complies with Directive 2002/95/EC (RoHS)

The OP4012B is a voltage-controlled SAW clock (VCSC) designed for phase-locked loop (PLL) applications

in optical data communications systems. The differential outputs of the OP4012B are generated by high-Q,

fundamental mode quartz surface acoustic wave (SAW) technology. This technique provides very low output

jitter and phase noise, plus excellent immunity to power supply noise. The OP4012B differential outputs

feature ±1% symmetry, and can be DC-configured to drive a wide range of high-speed logic families. The

OP4012B is packaged in a hermetic metal-ceramic LCC.

Absolute Maximum Ratings

Rating

Value

Units

DC Suppy Voltage

0 to 5.5

Vdc

Tuning Voltage

0 to 5.5

Vdc

Case Temperature

-55 to 100

°C

644.53125 MHz

Optical

Timing Clock

OP4012B

CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.

COCOM CAUTION: Approval by the U.S. Department of Commerce is required prior to export of this device.

Notes:

1.

2.

3.

The internal design, manufacturing processes, and specifications of this device are subject to change without notice.

4.

5.

Symmetry is defined as the width in (% of total period) measure at 50% of the peak-to-peak voltage of either output.

6.

Jitter and other noise outputs due to power supply noise or mechanical vibration are not included in this specification except where noted.

7.

Applies to period jitter of either differential output. Measured with a Tektronix CSA803 signal analyzer with at least 1000 sample.

8.

One or more of the following United States patents apply: 4, 616,197; 4,670,681; 4,760,352.

Electrical Characteristics

Characteristic

Sym

Notes

Minimum

Typical

Maximum

Units

Operating Frequency

Absolute Frequency

1

644.53125

MHz

Tuning Range

2

±100

ppm

Tuning Voltage

1

0

3.3

V

Tuning Linearity

1, 8

±5

%

Tuning Sensitivity

df/dv

2

100

260

ppm/V

Modulation Bandwidth

125

265

kHz

Q and Q Output

Voltage into 50

Ω (VSWR<1.2)

1,3

0.60

1.1

Operating Load VSWR

1,3

2:1

Symmetry

3, 4, 5

49

51

%

Harmonic Spurious

3, 4, 6

-30

dBc

Nonharmonic Spurious

3, 4, 6, 7

-60

dBc

Phase Noise

@ 100 Hz offset

3, 6

-70

dBc/Hz

@ 1 kHz offset

3, 6

-100

dBc/Hz

@ 10 kHz offset

3, 6

-125

dBc/Hz

Noise Floor

3, 6

-150

dBc/Hz

Q and Q Jitter

RMS Jitter

3, 4, 6, 7

2

ps

3, 4, 6, 7

12

312

Input Impedence (Tuning Port)

1K

Ω

Output DC Resistance (between Q & Q)1, 3

50

K

Ω

DC Power Supply

Operating Voltage

1, 3

3.13

3.3 or 5.0

5.25

Vdc

Operating Current

1, 3

70

mA

Operating Case Temperature

1, 3

-40

+85

°C

Lid Symbolization (YY=Year, WW=Week)

RFM OP4012B YYWW

SMC-08

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