RO3120A Ideal for 403.55 MHz Transmitters Very Low Series Resistance Quartz Stability 403.55 MHz Surface-mount Ceramic Case Complies with Directive 2002/95/EC (RoHS) Pb SAW The RO3120A is a true one-port, surface-acoustic-wave (SAW) resonator in a surface-mount ceramic case. Resonator It provides reliable, fundamental-mode, quartz frequency stabilization of fixed-frequency transmitters operating at 403.55 MHz. Absolute Maximum Ratings Rating Value Units CW RF Power Dissipation (See Typical Test Circuit) +5 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 Frequency, +25 C Nominal Frequency 403.475 403.625 MHz C 2, 3, 4, 5 f Tolerance from 403.055 MHz 75 kHz C Insertion Loss IL 2, 5, 6 1.1 1.5 dB Q Quality Factor Unloaded Q 16,400 U 5, 6, 7 Q 50 Loaded Q 2,000 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, 6 10 ppm/yr A DC Insulation Resistance between Any Two Terminals 5 1.0 M R RF Equivalent RLC Model Motional Resistance 14 M Motional Inductance L 5, 6, 7, 9 90 H M Motional Capacitance C 1.7 fF M Shunt Static Capacitance C 5, 6, 9 1.5 2.1 pF O Test Fixture Shunt Inductance L 2, 7 75 nH TEST Lid Symbolization 824 CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. Notes: 1. Frequency aging is the change in f with time and is specified at 7. Derived mathematically from one or more of the following directly C measured parameters: f , IL, 3 dB bandwidth, f versus T , and C . +65C or less. Aging may exceed the specification for prolonged tem- C C C O peratures above +65 C. Typically, aging is greatest the first year after 8. Turnover temperature, T , is the temperature of maximum (or O manufacture, decreasing in subsequent years. turnover) frequency, f . The nominal frequency at any case O 2. The center frequency, f , is measured at the minimum insertion loss C 2 temperature, T , may be calculated from: f = f 1 - FTC (T -T ) . C O O C point, IL , with the resonator in the 50 test system (VSWR MIN Typically oscillator T is approximately equal to the specified O 1.2:1). The shunt inductance, L , is tuned for parallel resonance TEST resonator T . O with C at f . Typically, f or f is approximately O C OSCILLATOR TRANSMITTER 9. This equivalent RLC model approximates resonator performance near equal to the resonator f . C the resonant frequency and is provided for reference only. The 3. One or more of the following United States patents apply: 4,454,488 capacitance C is the static (nonmotional) capacitance between the O and 4,616,197. two terminals measured at low frequency (10 MHz) with a capacitance 4. Typically, equipment utilizing this device requires emissions testing meter. The measurement includes parasitic capacitance withNC and government approval, which is the responsibility of the equipment pads unconnected. Case parasitic capacitance is approximately manufacturer. 0.05 pF. Transducer parallel capacitance can by calculated as: 5. Unless noted otherwise, case temperature T = +25 2 C. C C C -0.05pF. P O 6. The design, manufacturing process, and specifications of this device are subject to change without notice. www.RFM.com E-mail: info rfm.com Page 1 of 2 2008-2011 by RF Monolithics, Inc. RO3120A - 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. RO3120A - 6/27/11 (ppm) (f-f ) f o / o Case Ground Case Ground