RO3073A-1 * * * * * Ideal for European 315.0 MHz Transmitters Very Low Series Resistance Quartz Stability Surface-Mount Ceramic Case Complies with Directive 2002/95/EC (RoHS) 315.0 MHz SAW Resonator Pb The RO3073A-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 fixed-frequency transmitters operating at 315.0 MHz. This SAW is designed specifically for remote-control and wireless security transmitters operating in Europe under ETSI I-ETS 300 220 and in Germany under FTZ 17 TR 2100. Absolute Maximum Ratings Rating Value Units CW RF Power Dissipation (See: Typical Test Circuit) +0 dBm DC voltage Between Terminals (Observe ESD Precautions) 30 VDC -40 to +85 C 260 C Case Temperature Soldering Temperature (10 seconds / 5 cycles max.) SM5035-4 Electrical Characteristics Characteristic Center Frequency (+25 C) Absolute Frequency Sym fC Tolerance from 315.0 MHz Insertion Loss Quality Factor Temperature Stability Frequency Aging Notes fC 2,3,4,5 IL 2,5,6 Unloaded Q QU 50 Loaded Q QL Turnover Temperature TO Turnover Frequency fO Frequency Temperature Coefficient FTC |fA| Units MHz 50 kHz 2.2 dB 40 C 1300 10 25 fC 0.032 10 1 5 Motional Resistance RM Motional Inductance LM Motional Capacitance CM Shunt Static Capacitance CO 5, 6, 9 LTEST 2, 7 Test Fixture Shunt Inductance Maximum 315.050 8000 6,7,8 Absolute Value during the First Year Typical 1.5 5,6,7 DC Insulation Resistance between Any Two Terminals RF Equivalent RLC Model Minimum 314.950 1.0 5, 7, 9 Lid Symbolization (in addition to Lot and/or Date Codes) ppm/C2 ppm/yr M 19.4 78.4 H 3.3 fF 4.1 pF 64.2 nH 742 // YWWS CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. Notes: 1. 2. 3. 4. 5. 6. 7. Frequency aging is the change in fC with time and is specified at +65C or less. Aging may exceed the specification for prolonged temperatures above +65C. Typically, aging is greatest the first year after manufacture, decreasing 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 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 = +25C2C. The design, manufacturing process, and specifications of this device are subject to change without notice. Derived mathematically from one or more of the following directly measured parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO. 8. 9. 10. 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 approximately equal to 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 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. Tape and Reel standard per ANSI / EIA 481. RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 (c)1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: info@rfm.com http://www.rfm.com RO3073A-1-10/29/07 Page 1 of 2 315.0 MHz SAW Resonator Equivalent LC Model 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. 0.05 pF* Case Ground Case Ground Terminal Co = Cp + 0.05 pF Cp *Case Parasitics Terminal Rm Lm Cm Temperature Characteristics The curve shown on the right accounts for resonator contri- The test circuit inductor, LTEST, is tuned to resonate with the static capacitance, CO, at FC. bution only and does not in- fC = f O , T C = T O 0 clude LC component temperature contributions. ELECTRICAL TEST To 50 Network Analyzer From 50 Network Analyzer -100 -100 -150 -150 Typical Circuit Board Land Pattern -200 0 +20 +40 +60 +80 T = T C - T O ( C ) The circuit board land pattern shown below is one possible design. The optimum land pattern is dependent on the circuit board assembly process which varies by manufacturer. The distance between adjacent land edges should be at a maximum to minimize parasitic capacitance. Trace lengths from terminal lands to other components should be short and wide to minimize parasitic series inductances. (4 Places) Low-Loss Matching Network to 50 Typical Dimension: 0.010 to 0.047 inch (0.25 to 1.20 mm) Terminal NC NC Terminal Case Design Top View P INCIDENT - P REFLECTED Side View B Bottom View C E P INCIDENT CW RF Power Dissipation = -50 -200 -80 -60 -40 -20 POWER TEST 50 Source P at F C REFLECTED 0 -50 (f-fo ) / fo (ppm) Typical Test Circuit Typical Application Circuits Typical Low-Power Transmitter Application F +9VDC Modulation Input 47 L1 (Antenna) G C1 A 200k C2 RF Bypass RO3XXXA Bottom View D 470 Millimeters Inches Dimensions Min Nom Max Min Nom Max A 4.87 5.0 5.13 .191 .196 .201 B 3.37 3.5 3.63 .132 .137 .142 C 1.45 1.53 1.60 .057 .060 .062 D 1.35 1.43 1.50 .040 .057 .059 E .67 .80 .93 .026 .031 .036 F .37 .50 .63 .014 .019 .024 G 1.07 1.20 1.33 .042 .047 .052 Typical Local Oscillator Applications Output +VDC C1 +VDC L1 C2 RO3XXXA Bottom View RF Bypass RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 (c)1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: info@rfm.com http://www.rfm.com RO3073A-1-10/29/07 Page 2 of 2 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Murata: RO3073A-1