RO3123A Ideal for 307.3 MHz Transmitters Very Low Series Resistance 307.3 MHz Quartz Stability Surface-mount Ceramic Case Pb SAW Complies with Directive 2002/95/EC (RoHS) Resonator The RO3123A 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 307.3 MHz. 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 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 f Center Frequency, +25 C Absolute Frequency 307.200 307.400 MHz C 2,3,4,5 f Tolerance from 307.3 MHz 100 kHz C Insertion Loss IL 2,5,6 0.9 1.5 dB Q Quality Factor Unloaded Q 16400 U 5,6,7 Q 50 Loaded Q 1400 L T Temperature Stability Turnover Temperature 10 25 40 C O f f Turnover Frequency 6,7,8 O C 2 Frequency Temperature Coefficient FTC 0.032 ppm/C f Frequency Aging Absolute Value during the First Year 1 10 ppm/yr A DC Insulation Resistance between Any Two Terminals 5 1.0 M R RF Equivalent RLC Model Motional Resistance 9.8 M Motional Inductance L 5, 7, 9 83 H M Motional Capacitance C 3.2 fF M Shunt Static Capacitance C 5, 6, 9 3.0 pF O Test Fixture Shunt Inductance L 2, 7 89 nH TEST Lid Symbolization (in addition to Lot and/or Date Codes) 831 // YWWS 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 measured parameters: f , IL, 3 dB bandwidth, f versus T , and C . C C C C O less. Aging may exceed the specification for prolonged temperatures 8. Turnover temperature, T , is the temperature of maximum (or turnover) O above +65 C. Typically, aging is greatest the first year after manufacture, frequency, f . The nominal frequency at any case temperature, T , may be O C decreasing in subsequent years. 2 calculated from: f = f 1 - FTC (T -T ) . Typically oscillator T is O O C O 2. The center frequency, f , is measured at the minimum insertion loss point, C approximately equal to the specified resonator T . O IL , with the resonator in the 50 test system (VSWR 1.2:1). The MIN 9. This equivalent RLC model approximates resonator performance near the shunt inductance, L , is tuned for parallel resonance with C at f . TEST O C resonant frequency and is provided for reference only. The capacitance C O Typically, f or f is approximately equal to the OSCILLATOR TRANSMITTER is the static (nonmotional) capacitance between the two terminals resonator f . C measured at low frequency (10 MHz) with a capacitance meter. The 3. One or more of the following United States patents apply: 4,454,488 and measurement includes parasitic capacitance withNC pads unconnected. 4,616,197. Case parasitic capacitance is approximately 0.05 pF. Transducer parallel 4. Typically, equipment utilizing this device requires emissions testing and capacitance can by calculated as: C C -0.05pF. P O government approval, which is the responsibility of the equipment 10. Tape and Reel standard per ANSI / EIA 481. manufacturer. 5. Unless noted otherwise, case temperature T =+25 2 C. C 6. The design, manufacturing process, and specifications of this device are subject to change without notice. 7. Derived mathematically from one or more of the following directly www.RFM.com E-mail: info rfm.com Page 1 of 2 2008-2011 by RF Monolithics, Inc. RO3123A - 6/27/11Electrical Connections Equivalent Model The SAW resonator is bidirectional and may be Terminal 0.05 pF* installed with either orientation. The two terminals + C = C 0.05 pF o p are interchangeable and unnumbered. The callout C p NC indicates no internal connection. The NC pads *Case Parasitics assist with mechanical positioning and stability. External grounding of the NC pads is Terminal Rm Lm Cm recommended to help reduce parasitic capacitance in the circuit. Temperature Characteristics The curve shown on the right f = f , T = T Typical Test Circuit C O C O accounts for resonator 0 0 The test circuit inductor, L , is tuned to resonate with the static TEST -50 contribution only and does not -50 capacitance, C , at F . O C include LC component -100 -100 temperature contributions. -150 -150 -200 -200 ELECTRICAL TEST -80 -60 -40 -20 0 +40 +60 +80 +20 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 Top View C2 RF Bypass RO3XXXA Millimeters Inches Bottom View Dimensions 470 Min Nom Max Min Nom Max A 4.87 5.00 5.13 0.191 0.196 0.201 B 3.37 3.50 3.63 0.132 0.137 0.142 Typical Local Oscillator Applications C 1.45 1.53 1.60 0.057 0.060 0.062 D 1.35 1.43 1.50 0.040 0.057 0.059 Output E 0.67 0.80 0.93 0.026 0.031 0.036 +VDC F 0.37 0.50 0.63 0.014 0.019 0.024 C1 +VDC G 1.07 1.20 1.33 0.042 0.047 0.052 L1 H - 1.04 - - 0.041 - I - 1.46 - - 0.058 - C2 J - 0.50 - - 0.019 - RO3XXXA RF Bypass K - 1.05 - - 0.041 - Bottom View L - 1.44 - - 0.057 - M - 0.71 - - 0.028 - www.RFM.com E-mail: info rfm.com Page 2 of 2 2008-2011 by RF Monolithics, Inc. RO3123A - 6/27/11 (ppm) (f-f ) f o / o Case Ground Case Ground