Preliminary
OP4008B
•
•
•
•
Quartz SAW Stabilized and Filtered “Diff Sine” Technology
Fundamental-Mode Oscillation at 669.327 MHz
Voltage Tunable for Phase Lock Loop Operations
669.327 MHz
Optical
Timing Clock
Optical Timing Reference for Forward Error Correction Applications
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 environ-
ments. 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.
Absolute Maximum Ratings
Rating
Value
0 to 5.5
0 to 6
Units
Vdc
Vdc
°C
DC Suppy Voltage
Tuning Voltage
SMC-08
Case Temperature
-55 to 100
Electrical Characteristics
Characteristic
Sym
Notes
1, 9
2
Minimum
Typical
Maximum
Units
MHz
ppm
V
Operating Frequency
Absolute Frequency
Tuning Range
f
669.327
O
±100
0
1
Tuning Voltage
+3
1, 8
2,10
±3
Tuning Linearity
%
140
125
0.60
Tuning Sensitivity
Modulation Bandwidth
Voltage into 50 W (VSWR£1.2)
df/dv
300
ppm/V
kHz
265
Q and Q Output
V
1,3
1,3
1.1
2:1
V
P-P
O
Operating Load VSWR
Symmetry
3, 4, 5
3, 4, 6
3, 4, 6, 7
49
51
-30
-60
%
Harmonic Spurious
Nonharmonic Spurious
@100 Hz offset
@ 1 kHz offset
@ 10 k offset
dBc
dBc
Phase Noise
-75
-105
-125
-155
2
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
Noise Floor
3, 4, 6, 7
3, 4, 6, 7
Q and Q Jitter
RMS Jitter
ps
ps
ps
P-P
P-P
P-P
No Noise on V
12
CC
with 200 mV
noise added from 1 MHz to ½ f
3
12
P-P
O
Output DC Resistance (between Q & Q)
1, 3
1, 3
1, 3
50
KW
Vdc
mA
°C
DC Power Supply
5.25
70
Operating Voltage
Operating Current
V
3.3, 5.0
3.13
CC
I
CC
Operating Case Temperature
T
1, 3
-40
+85
C
Lid Symbolization (YY=Year, WW=Week)
RFM OP4008B 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.
BLOCK DIAGRAM
Notes:
1.
Unless otherwise noted, all specifications include any combination of load VSWR, Vcc, and temperature, with Q and Q terminated
V
CC
into 50 ohm loads to ground (see typical test circuit).
2.
3.
4.
5.
6.
Useful tuning range is in excess of what is required over temp, aging, pushing, pulling & accuracy.
The design, manufacturing process, and specifications of this device are subject to change without notice.
Only under the nominal conditions of 50 W load impedance with VSWR £ 1.2 and nominal power supply voltage.
Symmetry is defined as the pulse width (in percent of total period) measured at the 50% points of Q or Q (see timing definitions).
Jitter and other spurious outputs induced by externally generated electrical noise on VCC or mechanical vibration are not included in
Q
_
Q
V
tune
this specification, except where noted. External voltage regulation and careful PCB layout are recommended for optimum perfor-
mance.
Applies to period jitter of Q and Q. Measurements are made with the Tektronix CSA803 signal analyzer with at least 1000 samples.
Linearity is a function of the percentage variation from a permitted linear deviation versus the amount of frequency tune range (see
linearity definition).
SAW Oscillator
Buffer Amplifier
7.
8.
9.
One or more of the following United States patents apply: 4,616,197; 4,670,681; 4,760,352.
10. Over the range of 669.327 MHz ±25 ppm and the conditions of Note 1.
RF Monolithics, Inc.
RFM Europe
Phone: (972) 233-2903
Phone: 44 1963 251383
Fax: (972) 387-8148
Fax: 44 1963 251510
E-mail: info@rfm.com
http://www.rfm.com
OP4008B-041003
Page 1 of 5
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
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