RFM OP4008B

Preliminary
OP4008B
•
•
•
•
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
669.327 MHz
Optical
Timing Clock
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.
Absolute Maximum Ratings
Rating
DC Suppy Voltage
Tuning Voltage
Case Temperature
Value
Units
0 to 5.5
Vdc
0 to 6
Vdc
-55 to 100
°C
SMC-08
Electrical Characteristics
Operating Frequency
Q and Q Output
Characteristic
Absolute Frequency
Tuning Range
Tuning Voltage
Tuning Linearity
Tuning Sensitivity
Modulation Bandwidth
Voltage into 50 Ω (VSWR≤1.2)
Operating Load VSWR
Symmetry
Harmonic Spurious
Nonharmonic Spurious
Phase Noise
@100 Hz offset
@ 1 kHz offset
@ 10 k offset
Noise Floor
Q and Q Jitter
RMS Jitter
No Noise on VCC
with 200 mVP-P noise added from 1 MHz to ½ fO
Output DC Resistance (between Q & Q)
DC Power Supply
Operating Voltage
Operating Current
Operating Case Temperature
Lid Symbolization (YY=Year, WW=Week)
Sym
fO
df/dv
VO
Notes
1, 9
2
1
1, 8
2,10
1,3
1,3
3, 4, 5
3, 4, 6
3, 4, 6, 7
Minimum
Typical
669.327
±100
0
VCC
ICC
TC
1, 3
Units
MHz
ppm
V
%
ppm/V
kHz
VP-P
+3
±3
140
125
0.60
300
265
1.1
2:1
49
51
-30
-60
%
dBc
dBc
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
psP-P
psP-P
psP-P
KΩ
Vdc
mA
°C
-75
-105
-125
-155
2
12
12
3, 4, 6, 7
3, 4, 6, 7
3
1, 3
1, 3
1, 3
Maximum
50
3.13
5.25
70
3.3, 5.0
-40
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.
+85
BLOCK DIAGRAM
Notes:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Unless otherwise noted, all specifications include any combination of load VSWR, Vcc, and temperature, with Q and Q terminated
into 50 ohm loads to ground (see typical test circuit).
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 Ω 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
this specification, except where noted. External voltage regulation and careful PCB layout are recommended for optimum performance.
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).
One or more of the following United States patents apply: 4,616,197; 4,670,681; 4,760,352.
Over the range of 669.327 MHz ±25 ppm and the conditions of Note 1.
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-8148
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
V CC
Q
_
Q
V tune
SAW Oscillator
E-mail: [email protected]
http://www.rfm.com
OP4008B-041003
Buffer Amplifier
Page 1 of 5
669.327 MHz
Optical Timing Clock
OP4008B Tuning
OP4008B
The OP4008B will tune from 0 to 5 volts as shown in
the adjacent plot. For normal use in a PLL, the tuning
voltage will not change much from the nominal operating point. The operating point is determined by: (1)
the temperature of the OP4008B case, (2) the reference frequency from the PLL, and (3) the internal
characteristics of the key components used in the
OP4008B part. Although the nominal operating point
may be different from part to part by up to 1 volt, the
locked operation of the part in a PLL will not tune
more than 0.5 volts, allowing good linearity over the
operating range.
MHz
669.8
669.7
669.6
669.5
669.4
669.3
669.2
669.1
669
0
Typical PLL
2
Tune Volts
4
6
+Vcc
REF
Q
Tune
Loop Filter
Q
OP4008B
holdover
Xtal
..
N
RFM's OPB-series Voltage Controlled SAW Clocks are designed for use in Phase Lock Loops (PLL’s) for optical timing applications. PLL operating parameters such as loop bandwidth are typically determined by optical timing requirements, and
noise reduction demands in a given system. The phase noise in the OP4008B Clock is good enough to allow the loop bandwidth to be set at 100 Hz or less. Optical timing systems containing multiple or cascaded timing loops have additional considerations that apply. For example, jitter peaking is often determined by VCO linearity.
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-8148
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: [email protected]
http://www.rfm.com
OP4008B-041003
Page 2 of 5
669.327 MHz
Optical Timing Clock
Load Recommendations for the OP4008B
The Q and Q outputs of RFM's OPB-series of SAW
clocks are AC-coupled internally. This allows customers
to set the DC level of the outputs with a simple resistor
pair on each output to drive most any application.
V load x R1
R1 + R2
1)
Vdc=
2)
1 + 1 = 1
R1 R2 50
Vdc is the DC level desired on the outputs.
Vload is the DC supply on the load resistors (typically 3.3 V).
V LOAD
3.3V
R2
VTUNE
OP4005B
R1
R2
V DC
V DC
Load
R1
Equations 1 & 2 describe the voltage divider created by R1 & R2 and the equilivent load impedence set by the parrellel combination of R1 & R2.
A given load type will have specifications that set Vdc. Choose an available Vload that is 2x to 3x larger than the desired Vdc.
This will allow R1 to be expressed in terms of R2 as in equation 1. By substituting this result in equation 2, a value for R2
will result. Solving equation 1 for R1 with the known R2 is the last step.
Table 1 has some typical values for Vdc & Vload for various ECL loads along with R1 & R2 values that are standard.
Note that the OPB parts will drive negative ECL loads by applying negative voltage to the Vload points in the circuit.
Load Type
Vdc
R1
R2
Vload
10k 3.3 V PECL
1.95
120
91
3.3 V
100k 3.3 V PECL
1.88
120
91
3.3 V
10k 5 V PECL
3.65
180
68
5.0 V
100k 5 V PECL
3.58
180
68
5.0 V
10k -5 V NECL
-1.30
240
62
-5.0 V
100k -5 V NECL
-1.42
240
62
-5.0 V
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-8148
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: [email protected]
http://www.rfm.com
OP4008B-041003
Page 3 of 5
669.327 MHz
Optical Timing Clock
Single Sideband Phase Noise
Jitter
Jitter with 200 mV
of power supply noise
Symmetry
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-8148
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: [email protected]
http://www.rfm.com
OP4008B-041003
Page 4 of 5
669.327 MHz
SMC-8
Optical Timing Clock
8-Terminal Surface Mount Case
ELECTRICAL CONNECTIONS
1
8
2
7
3
6
4
Terminal
Number
5
1
VCC
2
Ground
3
Ground
4
Q Output
5
Q Output
6
7
TOP VIEW
Connection
Ground
8
TUNE Input
LID
Ground
Dimension
Typical Printed Circuit Board Land Pattern
A typical land pattern for a circuit board is shown below. Grounding of
the metallic center pad is optional.
Typically 0.01" to 0.05" or 0.25 mm to
1.25 mm (8 Places)
(The optimum value of this dimension is
dependent on the PCB assembly process
employed.)
B
D
C
mm
MIN
MAX
MIN
MAX
A
13.46
13.97
0.530
0.550
B
9.14
9.66
0.360
0.380
C
1.93 Nominal
0.076 Nominal
D
3.56 Nominal
0.141 Nominal
E
2.24 Nominal
0.088 Nominal
F
1.27 Nominal
0.050 Nominal
G
2.54 Nominal
0.100 Nominal
H
3.05 Nominal
0.120 Nominal
J
1.93 Nominal
0.076 Nominal
K
5.54 Nominal
0.218 Nominal
L
4.32 Nominal
0.170 Nominal
M
4.83 Nominal
0.190 Nominal
N
0.50 Nominal
0.020 Nominal
E
N (X8)
A
F (X8)
M
G
L
(X3)
H (X2)
K
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-8148
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
Inches
J
E-mail: [email protected]
http://www.rfm.com
OP4008B-041003
Page 5 of 5