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© 2008-2011 by RF Monolithics, Inc. RO3103A - 6/29/11
Electrical Characteristics
Characteristic Sym Notes Minimum Typical Maximum Units
Center Frequency, +25 °C Absolute Frequency fC2,3,4,5 417.925 418.075 MHz
Tolerance from 418.00 MHz ∆fC±75 kHz
Insertion Loss IL 2,5,6 1.5 2.0 dB
Quality Factor Unloaded Q QU5,6,7 12100
50 Ω Loaded Q QL1550
Temperature Stability Turnover Temperature TO6,7,8 10 25 40 °C
Turnover Frequency fOfC
Frequency Temperature Coefficient FTC 0.032 ppm/°C2
Frequency Aging Absolute Value during the First Year |fA|1≤ 10 ppm/yr
DC Insulation Resistance between Any Two Terminals 5 1.0 MΩ
RF Equivalent RLC Model Motional Resistance RM5, 7, 9 15 Ω
Motional Inductance LM67.5 µH
Motional Capacitance CM2.3 fF
Shunt Static Capacit ance CO5, 6, 9 2.3 pF
Test Fixture Shunt Inductance LTEST 2, 7 63 nH
Lid Symbolization (in addition to Lot and/or Date Codes) 659 || YWWS
• 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 fix ed-frequency transmitters
operating at 418 MHz.
Absolute Maximum Ratings
Rating Value Units
CW RF Power Dissipation +0 dBm
DC V oltage on any Non-ground Terminal ±30 VDC
Case Temperature -40 to +125 °C
Soldering Temperature, 10 seconds / 5 cycles maximum 260 °C
418.0 MH z
SAW
Resonator
RO3103A
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1. Frequency agin g is the chang e in fC with time an d is specif ied at +6 5 °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, fC, is measured at the minimum insertion loss point,
ILMIN, with the res onator in the 50 Ω test system (VSWR ≤ 1.2:1). The
shunt inductance, LTEST, is tuned for parallel resonance with CO at fC.
Typi cally, fOSCILLATOR or fTRANSMITTER is approximately equal to the
resonator fC.
3. One or more of the following United Sta tes patents apply: 4,454,488 and
4,616,197.
4. Typically, equipment utilizing this dev ic e requires emissions testing and
government app roval, which is the responsibility of the equipment
manufacturer.
5. Unless noted otherwise, case temperature TC=+25 ± 2 °C.
6. The design, manufacturing process, and specifications of this devic e are
subject to change without notice.
7. Derived mat hematically from one or more of the following directly
measured parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO.
8. Turnover temperature, TO, is the temperature of maximum (or turnover)
frequenc y, fO. T he nominal f requency at any case tempera ture, 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 approximate s resonator pe rformance near the
resonan t frequen cy and is provided for refer ence o nly. The capaci tanc e CO
is the static (nonmotional) capac i tance between the tw o terminals
measured at low freque ncy (10 MHz) with a cap acitance meter. The
measureme nt includes p arasitic cap acitanc e with "NC” pads unconne cted.
Case pa r as itic capacitance is approxi mately 0.05 pF. Transducer parallel
capacitance can by calculated as: CP≈CO- 0.05 pF.
10. Tape and Reel standard per ANSI / EIA 481.
SM5035-4
Pb