RFM products are now Murata products. RO3118 Designed for 318 MHz Transmitter Applications Low Series Resistance 318.00 MHz Quartz Stability Pb Rugged, Hermetic, Low-Profile TO39 Case SAW Complies with Directive 2002/95/EC (RoHS) The RO3118 is a true one-port, surface-acoustic-wave (SAW) resonator in a low-profile TO39 case. It provides Resonator reliable, fundamental-mode quartz frequency stabilization of fixed-frequency transmitters operating at or near 318 MHz. Absolute Maximum Ratings Rating Value Units CW RF Power Dissipation +0 dBm DC Voltage Between Terminals (Observe ESD Precautions) 30 VDC Case Temperature -40 to +85 C Soldering Temperature (10 seconds / 5 cycles max. 260 C TO39-3 Case Electrical Characteristics Characteristic Sym Notes Minimum Typical Maximum Units f Frequency (+25 C) Nominal Frequency 317.925 318.075 MHz C 2, 3, 4, 5 Tolerance from 318.000 MHz f 75 kHz C Insertion Loss IL 2, 5, 6 1.5 2.0 dB Quality Factor Unloaded Q Q 10700 U 5, 6, 7 50 Loaded Q Q 1400 L Temperature Stability Turnover Temperature T 10 25 40 C O Turnover Frequency f 6, 7, 8 f +4.2 kHz O C 2 Frequency Temperature Coefficient FTC 0.037 ppm/C Frequency Aging Absolute Value during the First Year fA 1, 6 10 ppm/yr DC Insulation Resistance between Any Two Pins 5 1.0 M RF Equivalent RLC Model Motional Resistance R 15 M Motional Inductance L 5, 6, 7, 9 80 H M Motional Capacitance C 3.1 fF M C Pin 1 to Pin 2 Static Capacitance 5, 6, 9 2.6 pF O C Transducer Static Capacitance 5, 6, 7, 9 3.0 pF P L Test Fixture Shunt Inductance 2, 7 96 nH TEST Lid Symbolization (in addition to Lot and/or Date Codes) RFM // RO3118 CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. NOTES: 1. Frequency aging is the change in f with time and is specified at +65C or 6. The design, manufacturing process, and specifications of this device are C subject to change without notice. less. Aging may exceed the specification for prolonged temperatures 7. Derived mathematically from one or more of the following directly above +65C. Typically, aging is greatest the first year after manufacture, measured parameters: f , IL, 3 dB bandwidth, f versus T , and C . decreasing significantly in subsequent years. C C C O 2. The center frequency, f , is measured at the minimum insertion loss point, 8. Turnover temperature, T , is the temperature of maximum (or turnover) C O IL , with the resonator in the 50 test system (VSWR 1.2:1). The frequency, f . The nominal frequency at any case temperature, T , may be MIN O C 2 shunt inductance, L , is tuned for parallel resonance with C at f . TEST O C calculated from: f = f 1 - FTC (T -T ) . Typically, oscillator T is 20C O O C O Typically, f or f is less than the resonator f . OSCILLATOR TRANSMITTER C less than the specified resonator T . O 3. One or more of the following United States patents apply: 4,454,488 and 9. This equivalent RLC model approximates resonator performance near the 4,616,197 and others pending. resonant frequency and is provided for reference only. The capacitance C O 4. Typically, equipment designs utilizing this device require emissions testing is the static (nonmotional) capacitance between pin1 and pin 2 measured and government approval, which is the responsibility of the equipment at low frequency (10 MHz) with a capacitance meter. The measurement manufacturer. includes case parasitic capacitance with a floating case. For usual 5. Unless noted otherwise, case temperature T = +25C2C. C grounded case applications (with ground connected to either pin 1 or pin 2 and to the case), add approximately 0.25 pF to C . O 2010-2014 by Murata Electronics N.A., Inc. RO3118 (R) 4/18/14 Page 1 of 2 www.murata.comElectrical Connections Temperature Characteristics This one-port, two-terminal SAW resonator is bidirectional. The terminals The curve shown on the right f = f , T = T C O C O are interchangeable with the exception of circuit board layout. 0 0 accounts for resonator -50 Pin Connection contribution only and does not -50 Bottom View include oscillator temperature -100 -100 Pin 1 1 Terminal 1 Pin 2 characteristics. -150 -150 2 Terminal 2 -200 Pin 3 -200 3 Case Ground -80 -60 -40 -20 0 +20 +40 +60 +80 T = T - T ( C ) C O Typical Test Circuit The test circuit inductor, L , is tuned to resonate with the static TEST capacitance, C at F . O C Equivalent LC Model Electrical Test: The following equivalent LC model is valid near resonance: 2 1 2 1 Network Network Analyzer Analyzer 3 C =C +0.25 pF* o p C p *Case Parasitics R L C MM M Power Test: 0.5 pF* 0.5 pF* 1 P 3 INCIDENT Low-Loss 50 Matching Source at P REFLECTED Network F Case Design C to 50 3 2 C - G CW RF Power Dissipation = P P INCIDENT REFLECTED B Typical Application Circuits H F E A Typical Low-Power Transmitter Application: D (3 places) 200k MPS-H10 Modulation Input +9VDC J 47 (2 places) C1 45 L1 1 2 (Antenna) C2 ROXXXX Millimeters Inches 3 RF Bypass Bottom View Dimensions 470 Min Max Min Max A 9.30 0.366 Typical Local Oscillator Application: B 3.18 0.125 C 2.50 3.50 0.098 0.138 Output +VDC D 0.46 Nominal 0.018 Nominal C1 L1 E 5.08 Nominal 0.200 Nominal +VDC 1 2 F 2.54 Nominal 0.100 Nominal C2 G 2.54 Nominal 0.100 Nominal ROXXXX 3 Bottom View RF Bypass H 1.02 0.040 J 1.40 0.055 2010-2014 by Murata Electronics N.A., Inc. www.murata.com RO3118 (R) 4/18/14 Page 2 of 2 (ppm) (f-f ) f / o o