參數(shù)資料
型號: RP1239
廠商: RF MONOLITHICS INC
元件分類: SAW諧振器
英文描述: 2-PORT SAW RESONATOR, 315 MHz
封裝: RUGGED, HERMETIC, LOW-PROFILE, TO-39, 3 PIN
文件頁數(shù): 2/2頁
文件大?。?/td> 149K
代理商: RP1239
315.0 MHz
SAW Resonator
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-9148
E-mail: info@rfm.com
Page 2 of 2
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
http://www.rfm.com
1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
RP1239-110499
Electrical Connections
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.
Typical Test Circuit
Typical Application Circuits
Case Design
Equivalent LC Model
Temperature Characteristics
Typical Frequency Response
Pin
Connection
1
Input or Output
2
Output or Input
3
Case Ground
Bottom View
Pin 1
Pin 2
Pin 3
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
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.
Phasing
& Match
Phasing
& Match
1
2
3
Conventional Two-Port Design:
Simulated One-Port Design:
B
45°
J
(2 places)
D
(3 places)
H
G
E
F
C
A
Dimensions
Millimeters
Inches
Min
Max
Min
Max
A
9.40
0.370
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
C
M
C o
R
M
L M
1
2
3
The following equivalent LC model is valid near resonance:
-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 resonator con-
tribution only and does not
include LC component tem-
perature contributions.
The plot shown below is a typical frequency response for the RP series of
two-port resonators. The plot is for RP1094.
-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.)
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