RFM products are now Murata products. RO3115 • • • • • Ideal for LO in 418 MHz Superheterodyne Receivers with 500 kHz IF Very Low Series Resistance Quartz Stability Pb Rugged, Hermetic, Low-Profile TO39 Case Complies with Directive 2002/95/EC (RoHS) 417.5 MHz SAW Resonator The RO3115 is a true one-port, surface-acoustic-wave (SAW) resonator in a low-profile TO39 case. It provides reliable, fundamental-mode, quartz frequency stabilization of oscillators operating at approximately 417.5 MHz. The RO3115 is designed for IC-based 418 MHz superhet receivers with 500 kHz IF (Philips UAA3201T). Applications include remote-control and wireless security receivers operating in the United Kingdom underDTI MPT 1340 and in the USA under FCC Part 15. Absolute Maximum Ratings Rating CW RF Power Dissipation Value (See: Typical Test Circuit) dBm ±30 VDC -40 to +85 °C DC Voltage Between Any Two Pins (Observe ESD Precautions) Case Temperature Characteristic Center Frequency (+25 °C) Sym Absolute Frequency fC Tolerance from 417.500 MHz fC Unloaded Q QU 50 Loaded Q QL Turnover Temperature TO Insertion Loss Quality Factor Temperature Stability IL Turnover Frequency Frequency Aging Notes 2, 3, 4, 5 fO 1.1 Absolute Value during the First Year |fA| 5, 6, 7 Units 417.575 MHz ±75 kHz 1.5 dB 40 °C 1200 20 fc -0.4 kHz 0.037 ppm/°C2 ppm/yr 1 5 Maximum 12000 6, 7, 8 FTC Typical 417.425 10 Frequency Temperature Coefficient TO39-3 Case Minimum 2, 5, 6 DC Insulation Resistance between Any Two Pins RF Equivalent RLC Model Units +0 1.0 M 10.6 49.3 µH Motional Resistance RM Motional Inductance LM Motional Capacitance CM 2.9 fF Pin 1 to Pin 2 Static Capacitance CO 5, 6, 9 2.2 pF CP 5, 6, 7, 9 2.0 pF LTEST 2, 7 65 nH Transducer Static Capacitance Test Fixture Shunt Inductance 5, 7, 9 Lid Symbolization (in Addition to Lot and/or Date Codes) RFM RO3115 CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. NOTES: 1. 2. 3. 4. 5. 6. Frequency aging is the change in fC 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 significantly in 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 less than the resonator fC. One or more of the following United States patents apply: 4,454,488 and 4,616,197 and others pending. Typically, equipment designs utilizing this device require 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. ©2010-2014 by Murata Electronics N.A., Inc. RO3115 (R) 4/15/14 7. 9. Derived mathematically from one or more of the following directly measured parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO. Turnover temperature, TO, is the temperature of maximum (or turnover) 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 20°C less than the specified resonator TO. 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 pin1 and pin 2 measured at low frequency (10 MHz) with a capacitance meter. The measurement includes case parasitic capacitance with a floating case. For usual grounded case applications (with ground connected to either pin 1 or pin 2 and to the case), add approximately 0.25 pF to CO. Page 1 of 2 www.murata.com 8. Temperature Characteristics This one-port, two-terminal SAW resonator is bidirectional. The terminals are interchangeable with the exception of circuit board layout. Pin Connection 1 Terminal 1 2 Terminal 2 3 Bottom View Pin 1 The curve shown on the right accounts for resonator contribution only and does not include oscillator temperature characteristics. fC = f O , T C = T O 0 0 -50 -50 -100 -100 -150 -150 (f-fo ) / fo (ppm) Electrical Connections Pin 2 -200 -80 -60 -40 -20 Case Ground Pin 3 -200 0 +20 +40 +60 +80 T = T C - T O ( °C ) Typical Test Circuit The test circuit inductor, LTEST, is tuned to resonate with the static capacitance, CO at FC. Equivalent LC Model Electrical Test: The following equivalent LC model is valid near resonance: 1 2 1 Network Analyzer 2 Network Analyzer Co= Cp + 0.25 pF* Cp 3 R M L M C *Case Parasitics M 0.5 pF* 0.5 pF* Power Test: 3 1 P INCIDENT Low-Loss Matching Network to 50 50 Source at P REFLECTED F C Case Design 3 2 C G B -P P INCIDENT REFLECTED CW RF Power Dissipation = H F Typical Application Circuits D (3 places) Typical Low-Power Transmitter Application: Modulation Input 200k J (2 places) MPS-H10 47 C1 L1 (Antenna) 2 Dimensions C2 ROXXXX Bottom View 3 RF Bypass 470 Typical Local Oscillator Application: Output +VDC C1 ROXXXX L1 +VDC 2 Min Max 9.40 B 3.18 2.50 3.50 Inches Min Max 0.370 0.125 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 J C2 3 Millimeters A C Bottom View 45° +9VDC 1 1 E A 1.02 1.40 0.040 0.055 RF Bypass ©2010-2014 by Murata Electronics N.A., Inc. RO3115 (R) 4/15/14 Page 2 of 2 www.murata.com