RFM products are now Murata products. RO3144A Designed for 916.5 MHz Transmitters Very Low Series Resistance 916.5 MHz Quartz Stability Pb Surface-mount Ceramic Case SAW Complies with Directive 2002/95/EC (RoHS) The RO3144A is a one-port surface-acoustic-wave (SAW) resonator packaged in a surface-mount ceramic Resonator case. It provides reliable, fundamental-mode quartz frequency stabilization of fixed-frequency transmitters operating at 916.5 MHz. Absolute Maximum Ratings Rating Value Units CW RF Power Dissipation 0 dBm DC Voltage Between Terminals 30 VDC Case Temperature -40 to +85 C Soldering Temperature, 10 seconds / 5 cycles maximum 260 C SM5035-4 Electrical Characteristics Characteristic Sym Notes Minimum Typical Maximum Units Frequency, +25 C RO3144A 916.300 916.700 RO3144A-1 f 916.350 916.650 MHz C RO3144A-2 916.400 916.600 2,3,4,5 Tolerance from 916.5 MHz RO3144A 200 RO3144A-1 f 150 kHz C RO3144A-2 100 Insertion Loss IL 2,5,6 1.2 2.5 dB Quality Factor Unloaded Q Q 5,6,7 6600 U 50 Loaded Q Q 750 L Temperature Stability Turnover Temperature T 10 25 40 C O Turnover Frequency f 6,7,8 f kHz O C 2 Frequency Temperature Coefficient FTC 0.032 ppm/C Frequency Aging Absolute Value during the First Year fA 1 <10 ppm/yr DC Insulation Resistance between Any Two Terminals 5 1.0 M R RF Equivalent RLC Model Motional Resistance 13.1 M Motional Inductance L 5, 6, 7, 9 15 H M Motional Capacitance C 2.1 fF M Shunt Static Capacitance C 5, 6, 9 2.09 pF O L Test Fixture Shunt Inductance 2, 7 14.5 nH TEST Lid Symbolization RO3144A: 663, RO3144A-1: 897, RO3144A-2: 813, // YYWWS CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. NOTES: 1. Frequency aging is the change in f with time and is specified at +65 C 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 +65 C. Typically, aging is greatest the first year after manufacture, measured parameters: f , IL, 3 dB bandwidth, f versus T , and C . decreasing 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 O O C O Typically, f or f is approximately equal to the OSCILLATOR TRANSMITTER approximately equal to the specified resonator T . O resonator f . C 9. This equivalent RLC model approximates resonator performance near the 3. One or more of the following United States patents apply: 4,454,488 and resonant frequency and is provided for reference only. The capacitance C O 4,616,197. is the static (nonmotional) capacitance between the two terminals 4. Typically, equipment utilizing this device requires emissions testing and measured at low frequency (10 MHz) with a capacitance meter. The government approval, which is the responsibility of the equipment measurement includes parasitic capacitance withNC pads unconnected. manufacturer. Case parasitic capacitance is approximately 0.05 pF. Transducer parallel 5. Unless noted otherwise, case temperature T = +25 2 C. C capacitance can by calculated as: C C -0.05pF. P O 2010-2014 by Murata Electronics N.A., Inc. RO3144A (R) 4/24/14 Page 1 of 2 www.murata.comElectrical Connections Equivalent RLC Model The SAW resonator is bidirectional and may be Terminal 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 Terminal recommended to help reduce parasitic Temperature Characteristics capacitance in the circuit. The curve shown on the right f = f , T = T C O C O Typical Test Circuit 0 0 accounts for resonator The test circuit inductor, L , is tuned to resonate with the static TEST -50 -50 contribution only and does not capacitance, C , at F . O C include LC component -100 -100 temperature contributions. -150 -150 -200 -200 ELECTRICAL TEST -80 -60 -40 -20 0 +20 +40 +60 +80 Case T = T - T ( C ) C O From 50 To 50 Network Analyzer Network Analyzer POWER TEST P INCIDENT Terminal Low-Loss 50 Source Matching NC NC P at F REFLECTED Network to C 50 Terminal P P CW RF Power Dissipation = INCIDENT - REFLECTED Typical Application Circuits Typical Low-Power Transmitter Application +9VDC 200k Modulation 47 % Input C1 L1 (Antenna) PCB Land Pattern C2 Top View RF Bypass RO3XXXA Bottom View 470 Millimeters Inches Dimensions Min Nom Max Min Nom Max A 4.87 5.00 5.13 0.191 0.196 0.201 Typical Local Oscillator Applications B 3.37 3.50 3.63 0.132 0.137 0.142 Output C 1.45 1.53 1.60 0.057 0.060 0.062 +VDC D 1.35 1.43 1.50 0.040 0.057 0.059 C1 +VDC E 0.67 0.80 0.93 0.026 0.031 0.036 L1 F 0.37 0.50 0.63 0.014 0.019 0.024 G 1.07 1.20 1.33 0.042 0.047 0.052 C2 H - 1.04 - - 0.041 - RO3XXXA I - 1.46 - - 0.058 - RF Bypass Bottom View J - 3.01 - - 0.119 - K - 1.44 - - 0.057 - L - 1.92 - - 0.076 - 2010-2014 by Murata Electronics N.A., Inc. www.murata.com RO3144A (R) 4/24/14 Page 2 of 2 (ppm) (f-f ) f / o o Case Ground Case Ground