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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
2 >
OP4012B
644.53125 MHz
? 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
Optical
Timing Clock
Rating
DC Suppy Voltage
Tuning Voltage
Value
0 to 5.5
0 to 5.5
Units
Vdc
Vdc
Case Temperature
-55 to 100
°C
SMC-08
Electrical Characteristics
Characteristic
Operating Frequency
Absolute Frequency
Sym
f O
Notes
1
Minimum
Typical
644.53125
Maximum
Units
MHz
Tuning Range
2
±100
ppm
Tuning Voltage
Tuning Linearity
1
1, 8
0
±5
3.3
V
%
Tuning Sensitivity
Modulation Bandwidth
df/dv
2
100
125
265
260
ppm/V
kHz
Q and Q Output
Voltage into 50 ? (VSWR<1.2)
V O
1,3
0.60
1.1
V P-P
Operating Load VSWR
1,3
2:1
Symmetry
Harmonic Spurious
Nonharmonic Spurious
3, 4, 5
3, 4, 6
3, 4, 6, 7
49
51
-30
-60
%
dBc
dBc
Phase Noise
Q and Q Jitter
@ 100 Hz offset
@ 1 kHz offset
@ 10 kHz offset
Noise Floor
RMS Jitter
No Noise on V CC
200 mV P-P Noise, from 1 MHz to ? f O on V CC
3, 6
3, 6
3, 6
3, 6
3, 4, 6, 7
3, 4, 6, 7
3
-70
-100
-125
-150
2
12
12
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
ps
ps P-P
ps P-P
Input Impedence (Tuning Port)
1
K ?
Output DC Resistance (between Q & Q)
1, 3
50
K ?
DC Power Supply
Operating Voltage
V CC
1, 3
3.13
3.3 or 5.0
5.25
Vdc
Operating Current
I CC
1, 3
70
mA
Operating Case Temperature
T C
1, 3
-40
+85
°C
Lid Symbolization (YY=Year, WW=Week)
RFM OP4012B YYWW
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. Unless otherwise noted, all specifications include the combined effects of load VSWR, V CC and T C .
2. Net tuning range after tuning out the effects of initial manufacturing tolerances, VSWR pushing/pulling, V CC , T C and aging.
3. The internal design, manufacturing processes, and specifications of this device are subject to change without notice.
4. Specified only for a balanced load with a VSWR < 1.2 ( 50 ohms each side), and a V CC = 3.0 Vdc.
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.
www.RFM.com E-mail: info@rfm.com
?2008-2010 by RF Monolithics, Inc.
Page 1 of 7
OP4012B - 2/4/10
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