®
RP1105
640.0 MHz
SAW
Resonator
•
•
•
•
•
Ideal for 639.9 or 640.0 MHz Oscillators
Nominal Insertion Phase Shift of 180° at Resonance
Quartz Stability
Rugged, Hermetic, Low-Profile TO39 Case
Complies with Directive 2002/95/EC (RoHS)
Pb
The RP1105 is a two-port, 180° surface-acoustic-wave (SAW) resonator in a low-profile TO39 case. It pro-
vides reliable, fundamental-mode, quartz frequency stabilization of fixed-frequency oscillators operating at or
near 640 MHz. In the typical CATV converter second LO application, the nominal LO frequency is
639.90 MHz. For these designs, the nominal resonator frequency is higher than the nominal oscillator fre-
quency to allow for production frequency tuning.
Absolute Maximum Ratings
Rating
CW RF Power Dissipation (See: Typical Test Circuit)
DC Voltage Between Any Two Pins (Observe ESD Precautions)
Case Temperature
Value
+5
±30
-40 to +85
Units
dBm
VDC
°C
TO39-3 Case
Electrical Characteristics
Center Frequency
Insertion Loss
Quality Factor
Temperature Stability
Unloaded Q
50
Ω
Loaded Q
Turnover Temperature
Turnover Frequency
Frequency Temp. Coefficient
Frequency Aging
RF Equivalent RLC
Absolute Value during First Year
Motional Resistance
Motional Inductance
Motional Capacitance
Shunt Static Capacitance
Lid Symbolization (in addition to Lot and/or Date Codes)
DC Insulation Resistance between Any Two Pins
R
M
L
M
C
M
C
O
5, 6, 9
1.4
5, 7, 9
Characteristic
Absolute Frequency
Tolerance from 640.000 MHz
Sym
f
C
∆f
C
IL
Q
U
Q
L
T
O
f
O
FTC
|f
A
|
6
5
1.0
185
395.520
0.156356
1.7
RFM P1105
2.0
322
6, 7, 8
Notes
2, 3, 4, 5,
2, 5, 6
5, 6, 7
64
Minimum
639.900
Typical
Maximum
640.100
±100
9.1
8,600
5,600
79
f
C
+69
0.037
≤
10
94
°C
kHz
ppm/°C
2
ppm/yr
MΩ
Ω
µH
fF
pF
12.5
Units
MHz
kHz
dB
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
1.
2.
3.
4.
5.
6.
7.
8.
9.
Notes:
Frequency aging is the change in f
C
with time and is specified at +65°C or less. Aging may exceed the specification for prolonged temperatures
above +65°C. Typically, aging is greatest the first year after manufacture, decreasing significantly in subsequent years.
The frequency f
C
is the frequency of minimum IL with the resonator in the specified test fixture in a 50
Ω
test system with VSWR
≤
1.2:1. Typically,
f
OSCILLATOR
or f
TRANSMITTER
is less than the resonator f
C
.
One or more of the following United States patents apply: 4,454,488; 4,616,197.
Typically, equipment utilizing this device requires emissions testing and government approval, which is the responsibility of the equipment manufac-
turer.
Unless noted otherwise, case temperature T
C
= +25°C± 5°C
The design, manufacturing process, and specifications of this device are subject to change without notice.
Derived mathematically from one or more of the following directly measured parameters: f
C
, IL, 3 dB bandwidth, f
C
versus T
C
, and C
O
.
Turnover temperature, T
O
, is the temperature of maximum (or turnover) frequency, f
O
. The nominal frequency at any case temperature, T
C
, may be
calculated from: f = f
O
[1 - FTC (T
O
- T
C
)
2
]. Typically,
oscillator
T
O
is 20° less than the specified
resonator
T
O
.
This equivalent RLC model approximates resonator performance near the resonant frequency and is provided for reference only. The capacitance
C
O
is the measured static (nonmotional) capacitance between either pin 1 and ground or pin 2 and ground. The measurement includes case parasitic
capacitance.
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-9148
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: info@rfm.com
http://www.rfm.com
RP1105-110499
Page 1 of 2
640.0 MHz
Electrical Connections
SAW Resonator
Equivalent LC Model
The following equivalent LC model is valid near resonance:
1
2
This two-port, three-terminal SAW resonator is bidirectional. However, im-
pedances and circuit board parasitics may not be symmetrical, requiring
slightly different oscillator component-matching values.
L
M
R
M
C
M
Co
3
Pin
1
2
3
Connection
Input or Output
Output or Input
Case Ground
Pin 1
Bottom View
Pin 2
Co
Pin 3
Temperature Characteristics
The curve shown on the right
accounts for resonator con-
tribution only and does not
include LC component tem-
perature contributions.
f
C
= f
O
, T
C
= T
O
0
(f-fo ) / fo (ppm)
0
-50
-100
-150
-200
0 +20 +40 +60 +80
Typical Test Circuit
Power Test
P
INCIDENT
1
2
-50
-100
Electrical Test
From 50
Ω
Network
Analyzer
To 50
Ω
Network
Analyzer
-150
-200
-80 -60 -40 -20
50
Ω
Source at
P
REFLECTED
F
C
Low-Loss
Matching
Network
to 50
Ω
3
1
2
3
∆
T = T
C
- T
O
( °C )
-P
CW RF Power Dissipation = P
REFLECTED
INCIDENT
Typical Frequency Response
The plot shown below is a typical frequency response for the RP series of
two-port resonators. The plot is for RP1094.
-10.0
200.0
100.0
-20.0
0.0
-100.0
-30.0
-200.0
-300.0
-40.0
-400.0
-500.0
-50.0
-600.0
-700.0
1
Typical Application Circuits
S21 magn.(dB)
Conventional Two-Port Design:
Simulated One-Port Design:
-60.0
2
-800.0
905.2
909.2
913.2
917.2
921.2
925.2
929.2
Frequency (MHz)
901.2
Phasing
& Match
Phasing
& Match
3
Case Design
C
B
H
F
A
D
(3 places)
J
(2 places)
E
G
Millimeters
Dimensions
Min
A
B
C
D
E
F
G
H
45°
Inches
Min
Max
0.370
0.125
0.098
0.138
0.018 Nominal
0.200 Nominal
0.100 Nominal
0.100 Nominal
0.040
0.055
Max
9.40
3.18
2.50
3.50
0.46 Nominal
5.08 Nominal
2.54 Nominal
2.54 Nominal
1.02
1.40
J
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-9148
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: info@rfm.com
http://www.rfm.com
RP1105-110499
Page 2 of 2
S21 phase (deg.)
This SAW resonator can be used in oscillator or transmitter designs that
require 180° phase shift at resonance in a two-port configuration. One-
port resonators can be simulated, as shown, by connecting pins 1 and 2
together. However, for most low-cost consumer products, this is only
recommended for retrofit applications and not for new designs.
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