
Electrical Connections
This two-port, three-terminal SAW resonator is bidirectional.
However, impedances and circuit board parasitics may not be
symmetrical, requiring slightly different oscillator component-
matching values.
Typical Test Circuit
Typical Application Circuits
Equivalent LC Model
The following equivalent LC model is valid near resonance:
Temperature Characteristics
Typical Frequency Response
50
Source at
F
C
Low-Loss
Matching
Network
50
to
Power Test
P
INCIDENT
CW RF Power Dissipation =
-
REFLECTED
P
1
3
2
2
3
1
From 50
Network
Analyzer
To 50
Network
Analyzer
Electrical Test
1
2
3
Conventional Two-Port Design:
Simulated One-Port Design:
This SAW resonator can be used in oscillator or transmitter de-
signs 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 ret-
rofit applications and not for new designs.
Dimensions
Millimeters
Inches
Min
Max
Min
Max
A
9.30
0.366
B
3.18
0.125
C
2.50
3.50
0.098
0.138
D
0.46 Nominal
0.018 Nominal
E
5.08 Nominal
0.200 Nominal
F
2.54 Nominal
0.100 Nominal
G
2.54 Nominal
0.100 Nominal
H
1.02
0.040
J
1.40
0.055
-80 -60 -40 -20
0 +20 +40 +60
0
-50
-100
-150
+80
-200
0
-50
-100
-150
-200
f
C = f O , T C = T O
T = T
C - T O ( °C )
(f-
f o
o
) /
f
(ppm
)
The curve shown on the
right accounts for resona-
tor contribution only and
does not include LC com-
ponent temperature con-
tributions.
-10.0
-20.0
-30.0
-40.0
-50.0
-60.0
200.0
100.0
0.0
-100.0
-200.0
-300.0
-400.0
-500.0
-600.0
-700.0
-800.0
901.2
905.2
909.2
913.2
917.2
921.2
925.2
929.2
Frequency (MHz)
S21
magn.(dB)
S21
phase
(deg.)
B
45°
J
(2 places)
D
(3 places)
H
G
E
F
C
A
Case Design
The plot shown below is a typical frequency response for the
RP series of two-port resonators. The plot is for RP1094.
C
M
C o
Co
R
M
L
M
1
2
3
Pin
Connection
1
Input or Output
2
Output or Input
3
Case Ground
22
Bottom View
Pin 1
Pin 2
Pin 3
RP Series TO39 Two-Port SAW Resonators