RFM products are now Murata products. RO3073E Ideal for 315 MHz Automotive-Keyless-Entry Transmitters Very Low Series Resistance 315.0 MHz Quartz Stability Pb Complies with Directive 2002/95/EC (RoHS) SAW The RO3073E 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 local oscillators operating at Resonator approximately 315 MHz. This SAW was designed for AM transmitters in automotive-keyless-entry applications operating in the USA under FCC Part 15, in Canada under DoC RSS-210, and in Italy. Absolute Maximum Ratings Rating Value Units Input Power Level 0 dBm DC Voltage 12 VDC Storage Temperature Range -40 to +125 C SM3030-6 Case Operating Temperature Range -40 to +105 C 3.0 X 3.0 Soldering Temperature (10 seconds / 5 cycles max.) 260 C Characteristic Sym Notes Minimum Typical Maximum Units f Frequency (+25 C) Absolute Frequency 314.925 315.075 MHz C 2, 3, 4, 5 f Tolerance from 315.0 MHz 75 kHz C Insertion Loss IL 2, 5, 6 1.6 2.4 dB Q Quality Factor Unloaded Q 8200 U Q 50W Loaded Q 1350 L T Temperature Stability Turnover Temperature 10 25 35 C O f f Turnover Frequency 6, 7, 8 O C 2 Frequency Temperature Coefficient FTC 0.032 ppm/C Frequency Aging Absolute Value during the First Year f 1, 6 10 ppm/yr A DC Insulation Resistance between Any Two Terminals 5 1.0 M RF Equivalent RLC Model Motional Resistance R 19.8 M Motional Inductance L 5, 7, 9 82 H M Motional Capacitance C 3.1 fF M Shunt Static Capacitance C 5, 6, 9 4.1 pF O Test Fixture Shunt Inductance L 2, 7 63 nH TEST Lid Symbolization 704 // YWWS Standard Reel Quantity Reel Size 7 Inch 500 Pieces / Reel 10 Reel Size 13 Inch 3000 Pieces / Reel 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 less. 7. Derived mathematically from one or more of the following directly measured C parameters: f , IL, 3 dB bandwidth, f versus T , and C . Aging may exceed the specification for prolonged temperatures above +65C. C C C O Typically, aging is greatest the first year after manufacture, decreasing in 8. Turnover temperature, T , is the temperature of maximum (or turnover) O subsequent years. frequency, f . The nominal frequency at any case temperature, T , may be O C 2. The center frequency, f , is measured at the minimum insertion loss point, IL , C MIN 2 calculated from: f = f 1 - FTC (T -T ) . Typically oscillator T is O O C O with the resonator in the 50 test system (VSWR 1.2:1). The shunt approximately equal to the specified resonator T . O inductance, L , is tuned for parallel resonance with C at f . Typically, TEST O C 9. This equivalent RLC model approximates resonator performance near the f or f is approximately equal to the resonator f . OSCILLATOR TRANSMITTER C resonant frequency and is provided for reference only. The capacitance C is O 3. One or more of the following United States patents apply: 4,454,488 and the static (nonmotional) capacitance between the two terminals measured at low 4,616,197. frequency (10 MHz) with a capacitance meter. The measurement includes 4. Typically, equipment utilizing this device requires emissions testing and parasitic capacitance withNC pads unconnected. Case parasitic capacitance government approval, which is the responsibility of the equipment manufacturer. is approximately 0.05 pF. Transducer parallel capacitance can by calculated as: 5. Unless noted otherwise, case temperature T =+25C2C. C C C -0.05pF. P O 6. The design, manufacturing process, and specifications of this device are subject 10. Tape and Reel Standard Per ANSI / EIA 481. to change without notice. 2010-2014 by Murata Electronics N.A., Inc. RO3073E (R) 3/27/14 Page 1 of 2 www.murata.comPower Test Electrical Connections Pin Connection The SAW resonator is bidirectional and 1NC may be installed with either orientation. 2 Terminal P The two terminals are interchangeable INCIDENT Low-Loss 3NC 50 Source and unnumbered. The callout NC 2 3 Matching 1 at F indicates no internal connection. The NC 4NC C Network to 6 5 4 pads assist with mechanical positioning P 5 Terminal REFLECTED 50 and stability. External grounding of the 6NC NC pads is recommended to help reduce parasitic capacitance in the circuit. Typical Application Circuits BC GH Typical Low-Power Transmitter Application 1 6 6 1 200k +9VDC Modulation Input C1 47 A 2 5 EF 5 2 I L1 (Antenna) 2 3 1 3 4 3 4 6 5 4 D J C2 ROXXXXC Bottom View RF Bypass 470 Typical Local Oscillator Application Output 200k Case Dimensions +VDC C1 mm Inches +VDC Dimension L1 Min Nom Max Min Nom Max A 2.87 3.0 3.13 0.113 0.118 0.123 2 3 1 B 2.87 3.0 3.13 0.113 0.118 0.123 6 5 4 C 1.12 1.25 1.38 0.044 0.049 0.054 C2 D 0.77 0.90 1.03 0.030 0.035 0.040 ROXXXXC Bottom View E 2.67 2.80 2.93 0.105 0.110 0.115 RF Bypass F 1.47 1.6 1.73 0.058 0.063 0.068 G 0.72 0.85 0.98 0.028 0.033 0.038 H 1.37 1.5 1.63 0.054 0.059 0.064 Equivalent LC Model I 0.47 0.60 0.73 0.019 0.024 0.029 0.05 pF* J 1.17 1.30 1.43 0.046 0.051 0.056 + C = C p 0.05 pF o C p Typical Test Circuit *Case Parasitics The test circuit inductor, L , is tuned to resonate with the static TEST capacitance, C , at F . O C Rm Lm Cm Electrical Test Temperature Characteristics The curve shown on the right accounts for resonator contribution only and does not include LC component temperature contributions. f = f , T = T C O C O 0 0 6 1 -50 -50 From 50 To 50 5 2 Network Analyzer Network Analyzer -100 -100 4 3 -150 -150 -200 -200 -80 -60 -40 -20 0 +20 +40 +60 +80 T = T - T ( C ) C O 2010-2014 by Murata Electronics N.A., Inc. www.murata.com RO3073E (R) 3/27/14 Page 2 of 2 (ppm) f (f-f ) / o o