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Murata Manufacturing Electronic Components Datasheet

RO3118E-1 Datasheet

SAW Resonator

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RoHS Compliance
This component is compliant
with RoHS directive.
This component was always
RoHS compliant from the first
date of manufacture.
• Ideal for 318 MHz Automotive-Keyless-Entry Transmitters
• Very Low Series Resistance
• Quartz Stability
The RO3118E-1 is a true one-port, surface-acoustic-wave (SAW) resonator in a surface-mount, ceramic
case. It provides reliable, fundamental-mode, quartz frequency stabilization of local oscillators operating at
approximately 318 MHz.
Absolute Maximum Ratings
Rating
Input Power Level
DC Voltage
Storage Temperature Range
Operating Temperature Range
Soldering Temperature (10 seconds / 5 cycles max.)
Value
0
12
-40 to +125
-40 to +105
260
Units
dBm
VDC
°C
°C
°C
RO3118E-1
318.0 MHz
SAW Resonator
SM3030-6 Case
3.0 X 3.0
Characteristic
Frequency (+25 °C)
Absolute Frequency
Tolerance from 315.0 MHz
Insertion Loss
Quality Factor
Unloaded Q
50W Loaded Q
Temperature Stability
Turnover Temperature
Turnover Frequency
Frequency Temperature Coefficient
Frequency Aging
Absolute Value during the First Year
DC Insulation Resistance between Any Two Terminals
RF Equivalent RLC Model Motional Resistance
Motional Inductance
Motional Capacitance
Shunt Static Capacitance
Test Fixture Shunt Inductance
Lid Symbolization
Standard Reel Quantity
Reel Size 7 Inch
Reel Size 13 Inch
Sym
fC
fC
IL
QU
QL
TO
fO
FTC
|fA|
RM
LM
CM
CO
LTEST
Notes
2, 3, 4, 5
2, 5, 6
6, 7, 8
1, 6
5
5, 7, 9
5, 6, 9
2, 7
10
Minimum
317.950
Typical
Maximum
318.050
±50
1.6 2.2
9000
1500
10 25 40
fC
0.032
10
1.0
21
93
2.7
2.8
89
765 // YWWS
500 Pieces / Reel
3000 Pieces / Reel
Units
MHz
kHz
dB
°C
ppm/°C2
ppm/yr
M
µH
fF
pF
nH
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1. Frequency aging is the change in fC with time and is specified at +65°C or less. 7. Derived mathematically from one or more of the following directly measured
Aging may exceed the specification for prolonged temperatures above +65°C.
parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO.
Typically, aging is greatest the first year after manufacture, decreasing in
8. Turnover temperature, TO, is the temperature of maximum (or turnover)
2.
3.
4.
5.
6.
subsequent years.
The center frequency, fC, is measured at the minimum insertion loss point, ILMIN,
with the resonator in the 50 test system (VSWR 1.2:1). The shunt
inductance, LTEST, is tuned for parallel resonance with CO at fC. Typically,
fOSCILLATOR or fTRANSMITTER is approximately equal to the resonator fC.
One or more of the following United States patents apply: 4,454,488 and
4,616,197.
Typically, equipment utilizing this device requires emissions testing and
government approval, which is the responsibility of the equipment manufacturer.
Unless noted otherwise, case temperature TC = +25°C±2°C.
The design, manufacturing process, and specifications of this device are subject
to change without notice.
frequency, fO. The nominal frequency at any case temperature, TC, may be
calculated from: f = fO [1 - FTC (TO -TC)2]. Typically oscillator TO is
approximately equal to the specified resonator TO.
9. This equivalent RLC model approximates resonator performance near the
resonant frequency and is provided for reference only. The capacitance CO is
the static (nonmotional) capacitance between the two terminals measured at low
frequency (10 MHz) with a capacitance meter. The measurement includes
parasitic capacitance with "NC” pads unconnected. Case parasitic capacitance
is approximately 0.05 pF. Transducer parallel capacitance can by calculated as:
CP CO - 0.05 pF.
10. Tape and Reel Standard Per ANSI / EIA 481.
Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 2007
RO3118E-1 (R) 4/26/19
Page 1 of 2
www.murata.com


Murata Manufacturing Electronic Components Datasheet

RO3118E-1 Datasheet

SAW Resonator

No Preview Available !

Electrical Connections
The SAW resonator is bidirectional and
may be installed with either orientation.
The two terminals are interchangeable
and unnumbered. The callout NC
indicates no internal connection. The NC
pads assist with mechanical positioning
and stability. External grounding of the
NC pads is recommended to help reduce
parasitic capacitance in the circuit.
Pin
1
2
3
4
5
6
Connection
NC
Terminal
NC
NC
Terminal
NC
BC
16
G
6
H
1
A2
5 E F5
2I
34
43
DJ
Case Dimensions
Dimension
mm
Min Nom Max Min
A 2.87 3.0 3.13 0.113
B 2.87 3.0 3.13 0.113
C 1.12 1.25 1.38 0.044
D 0.77 0.90 1.03 0.030
E 2.67 2.80 2.93 0.105
F 1.47 1.6 1.73 0.058
G 0.72 0.85 0.98 0.028
H 1.37 1.5 1.63 0.054
I 0.47 0.60 0.73 0.019
J 1.17 1.30 1.43 0.046
Inches
Nom
0.118
0.118
0.049
0.035
0.110
0.063
0.033
0.059
0.024
0.051
Max
0.123
0.123
0.054
0.040
0.115
0.068
0.038
0.064
0.029
0.056
Typical Test Circuit
The test circuit inductor, LTEST, is tuned to resonate with the static
capacitance, CO, at FC.
Electrical Test
From 50
Network Analyzer
6
1
52
43
To 50
Network Analyzer
Power Test
50 Source
at F C
P INCIDENT
P REFLECTED
Low-Loss
Matching
Network to
50
12
65
3
4
Typical Application Circuits
Typical Low-Power Transmitter Application
Modulation
Input
200k
C1
ROXXXXC
Bottom View
12
65
3
4
C2
+VDC
470
Typical Local Oscillator Application
200k
C1
+9VDC
L1
(Antenna)
47
RF Bypass
Output
+VDC
L1
ROXXXXC
Bottom View
12
65
3
4
C2
RF Bypass
Equivalent LC Model
0.05 pF*
Cp
Co= Cp +0.05 pF
*Case Parasitics
Rm Lm Cm
Temperature Characteristics
The curve shown on the right accounts for resonator contribution only and
does not include LC component temperature contributions.
fC = f O , TC = T O
00
-50 -50
-100
-100
-150
-150
-200
-200
-80 -60 -40 -20 0 +20 +40 +60 +80
T = TC - T O ( °C )
Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 2007
RO3118E-1 (R) 4/26/19
Page 2 of 2
www.murata.com


Part Number RO3118E-1
Description SAW Resonator
Maker muRata
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