RO2150 • • • • Ideal for 304.0 MHz Transmitters Very Low Series Resistance Quartz Stability Rugged, Hermetic, Low-Profile TO39 Case 304.0 MHz SAW Resonator The RO2150 is a true one-port, surface-acoustic-wave (SAW) resonator in a low-profile TO39 case. It provides reliable, fundamental-mode, quartz frequency stabilization of fixed-frequency oscillators operating at 304.0 MHz. The RO2150 is designed for wireless remote-control transmitters operating in Japan and Australia. Absolute Maximum Ratings Rating Value Units +5 dBm ±30 VDC -40 to +85 °C CW RF Power Dissipation DC Voltage Between Terminals (Observe ESD Precautions) Case Temperature TO39-3 Case Electrical Characteristics Characteristic Center Frequency at +25 °C Absolute Frequency Sym fC Tolerance from 304.0 MHz ∆fC 2, 3, 4, 5 IL 2, 5, 6 Unloaded Q QU 50 Ω Loaded Q QL Turnover Temperature TO Insertion Loss Quality Factor Temperature Stability Turnover Frequency Frequency Aging Notes FTC Absolute Value during the First Year |fA| RF Equivalent RLC Model Maximum Units MHz ±50 kHz 2.0 dB 40 °C 2,000 6, 7, 8 25 fC kHz 0.037 ppm/°C2 ppm/yr ≤±10 1 5 1.0 MΩ 16.1 RM Motional Inductance LM Motional Capacitance CM Pin 1 to Pin 2 Static Capacitance CO 5, 6, 9 CP 5, 6, 7, 9 1.01 pF LTEST 2, 7 217.82 nH 5, 6, 7, 9 26 Ω Motional Resistance Transducer Static Capacitance Test Fixture Shunt Inductance 1.5 10 DC Insulation Resistance between Any Two Terminals Typical 304.0 14,350 5, 6, 7 fO Frequency Temperature Coefficient Minimum 120.9559 µH 2.266061 Lid Symbolization 1.26 fF 1.3 pF RFM RO2150 CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. Notes: 1. 2. 3. 4. 5. 6. 7. Lifetime (10 year) frequency aging. The center frequency, fC, is measured at the minimum insertion loss point, ILMIN, with the resonator in the 50 Ω test system (VSWR ≤ 1.2:1). The shunt inductance, LTEST, is tuned for parallel resonance with CO at 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 = +25°C±2°C. 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 8. 9. measured parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO . 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]. 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 Pin 1 and Pin 2 measured at low frequency (10 MHz) with a capacitance meter. The measurement includes parasitic capacitance with a floating case. Case parasitic capacitance is approximately 0.25pF. Transducer parallel capacitance can be calculated as CP ≈ CO - 0.25pF. RF Monolithics, Inc. RO2150-102799 304.0 MHz SAW Resonator Electrical Connections Temperature Characteristics Pin Connection 1 Terminal 1 2 Terminal 2 3 Case Ground Bottom View Pin 1 Pin 2 The curve shown on the right accounts for resonator contribution only and does not include oscillator temperature characteristics. fC = f O , T C = T O 0 0 -50 -50 -100 -100 -150 -150 (f-fo ) / fo (ppm) This one-port, two-terminal SAW resonator is bidirectional. The terminals are interchangeable with the exception of circuit board layout. -200 -80 -60 -40 -20 Pin 3 -200 0 +20 +40 +60 +80 ∆T = TC - T O ( °C ) Typical Test Circuit The test circuit inductor, LTEST, is tuned to resonate with the static capacitance, CO at FC. Equivalent LC Model Electrical Test: The following equivalent LC model is valid near resonance: Ω 1 Ω 2 1 Network Analyzer 2 Network Analyzer Co= Cp + 0.25 pF* Cp 3 *Case Parasitics R M L M C M 0.5 pF* 0.5 pF* Power Test: 3 P INCIDENT 50 Ω Source at P REFLECTED F C 1 Low-Loss Matching Network to 50 Ω Case Design 3 2 C G B CW RF Power Dissipation = -P P INCIDENT REFLECTED H F Typical Application Circuits D (3 places) Typical Low-Power Transmitter Application: Modulation Input 200k Ω E A J (2 places) MPS-H10 45° +9VDC 47 C1 1 L1 Millimeters (Antenna) 2 Inches Dimensions Min C2 ROXXXX Bottom View 3 RF Bypass A B 470 C Typical Local Oscillator Application: Output +VDC C1 1 L1 +VDC 2 Bottom View 3 Min 3.18 2.50 3.50 Max 0.366 0.125 0.098 0.138 D 0.46 Nominal 0.018 Nominal E 5.08 Nominal 0.200 Nominal F 2.54 Nominal 0.100 Nominal G 2.54 Nominal 0.100 Nominal H J C2 ROXXXX Max 9.30 1.02 1.40 0.040 0.055 RF Bypass RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-9148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: [email protected] http://www.rfm.com RO2150-102799 Page 2 of 2