RO2188 ® • • • • • Ideal for 390.0 MHz Transmitters Very Low Series Resistance Quartz Stability Rugged, Hermetic, TO39-3 Package Complies with Directive 2002/95/EC (RoHS) 390.0 MHz SAW Resonator Pb The RO2188 is a true one-port, surface-acoustic-wave (SAW) resonator in TO39-3 case. It provides reliable, fundamental-mode, quartz frequency stabilization of fixed-frequency transmitters operating at 390.0 MHz. Absolute Maximum Ratings Rating Value Units CW RF Power Dissipation +5 dBm DC Voltage Between Any Two Pins (Observe ESD Precautions) ±30 VDC -40 to +85 °C 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| 0.9 Units MHz ±100 kHz 2.0 dB 57 °C 42 fC-5 kHz 0.037 ppm/°C2 ppm/yr 6, 7, 8 ≤10 1 5 Maximum 390.100 1,200 27 DC Insulation Resistance between Any Two Terminals RF Equivalent RLC Model Typical 12,000 5, 6, 7 fO Frequency Temperature Coefficient Minimum 389.900 1.0 MΩ RM Motional Inductance LM Motional Capacitance CM Pin 1 to Pin 2 Static Capacitance CO 5, 6, 9 CP 5, 6, 7, 9 3.65 pF LTEST 2, 7 43 nH Transducer Static Capacitance Test Fixture Shunt Inductance 11 26 Ω Motional Resistance 54.963 5, 7, 9 µH 3.0299 3.6 Lid Symbolization 3.9 fF 4.2 pF E319 CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. Notes: 1. 2. Lifetime (10 year) frequency aging. The center frequency, fC, is measured at the minimum insertion loss point, parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO. 8. ILMIN, with the resonator in the 50 Ω test system (VSWR ≤ 1.2:1). The shunt quency, fO. The nominal frequency at any case temperature, TC, may be cal- inductance, LTEST, is tuned for parallel resonance with CO at fC. 3. 4. 5. 6. 7. 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. Turnover temperature, TO, is the temperature of maximum (or turnover) freculated from: f = fO [1 - FTC (TO -TC)2]. 9. 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 measured 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. 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 the two terminals 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. E-mail: [email protected] http://www.rfm.com RO2188-031300 Page 1 of 2 390.0 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 0.370 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 9.40 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 RO2188-031300 Page 2 of 2