Copyright © Murata Manufacturing Co., Ltd. All Rights Reserved. 2014
RO3103A (R) 10/10/16 Page 1 of 2
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Electrical Characteristics
Characteristic Sym Notes Minimum Typical Maximum Units
Center Frequency, +25 °C Absolute Frequency
f
C
2,3,4,5
417.925 418.075 MHz
Tolerance from 418.00 MHz
f
C
±75 kHz
Insertion Loss IL 2,5,6 1.5 2.0 dB
Quality Factor Unloaded Q
Q
U
5,6,7
12100
50 Loaded Q
Q
L
1550
Temperature Stability Turnover Temperature
T
O
6,7,8
10 25 40 °C
Turnover Frequency
f
O
f
C
Frequency Temperature Coefficient FTC 0.032
ppm/°C
2
Frequency Aging Absolute Value during the First Year
|f
A
|
1 10 ppm/yr
DC Insulation Resistance between Any Two Terminals 5 1.0 M
RF Equivalent RLC Model Motional Resistance
R
M
5, 7, 9
15
Motional Inductance
L
M
67.5 µH
Motional Capacitance
C
M
2.3 fF
Shunt Static Capacitance
C
O
5, 6, 9 2.3 pF
Test Fixture Shunt Inductance
L
TEST
2, 7 63 nH
Lid Symbolization (in addition to Lot and/or Date Codes) 659 || YYWWS
• Ideal for 418.0 MHz Transmitters
• Very Low Series Resistance
• Quartz Stability
• Surface-mount Ceramic Case
• Complies with Directive 2002/95/EC (RoHS)
The RO3103A 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 fixed-frequency transmitters
operating at 418 MHz.
Absolute Maximum Ratings
Rating Value Units
CW RF Power Dissipation +0 dBm
DC Voltage on any Non-ground Terminal ±30 VDC
Case Temperature -40 to +125 °C
Soldering Temperature, 10 seconds / 5 cycles maximum 260 °C
418.0 MHz
SAW
Resonator
RO3103A
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
NOTES:
1. 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 in subsequent years.
2. The center frequency, f
C
, is measured at the minimum insertion loss point,
IL
MIN
, with the resonator in the 50 test system (VSWR 1.2:1). The
shunt inductance, L
TEST
, is tuned for parallel resonance with C
O
at f
C
.
Typically, f
OSCILLATOR
or f
TRANSMITTER
is approximately equal to the
resonator f
C
.
3. One or more of the following United States patents apply: 4,454,488 and
4,616,197.
4. Typically, equipment utilizing this device requires emissions testing and
government approval, which is the responsibility of the equipment
manufacturer.
5. Unless noted otherwise, case temperature T
C
= +25 ± 2 °C.
6. The design, manufacturing process, and specifications of this device are
subject to change without notice.
7. 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
.
8. 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
approximately equal to the specified resonator T
O
.
9. This equivalent RLC model approximates resonator performance near the
resonant frequency and is provided for reference only. The capacitance C
O
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: C
P
C
O
- 0.05 pF.
10. Tape and Reel standard per ANSI / EIA 481.
SM5035-4
Pb
