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RO2156A Datasheet(PDF) 1 Page - RF Monolithics, Inc |
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RO2156A Datasheet(HTML) 1 Page - RF Monolithics, Inc |
1 / 2 page ® RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 E-mail: info@rfm.com Page 1 of 2 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 http://www.rfm.com ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. RO2156A_RO2156A-1_RO2156A-2 _012202 Electrical Characteristics Characteristic Sym Notes Minimum Typical Maximum Units Frequency at +25°C Nominal Frequency RO2156A fC 2,3,4,5 868.875 869.025 MHz RO2156A-1 868.875 869.175 RO2156A-2 868.850 869.050 Tolerance from 868.95 MHz RO2156A ∆f C ±75 kHz RO2156A-1 -75 +225 RO2156A-2 ±100 Insertion Loss IL 2,5,6 1.1 2.0 dB Quality Factor Unloaded Q QU 5,6,7 38,997 50 Ω Loaded Q QL 4,000 Temperature Stability Turnover Temperature TO 6,7,8 10 25 40 °C Turnover Frequency fO fC kHz Frequency Temperature Coefficient FTC 0.032 ppm/°C2 Frequency Aging Absolute Value during the First Year |fA| 1 <±10 ppm/yr DC Insulation Resistance between Any Two Terminals 5 1.0 M Ω RF Equivalent RLC Model Motional Resistance RM 5, 6, 7, 9 11.4295 Ω Motional Inductance LM 81.637 µH Motional Capacitance CM 0.41 fF Shunt Static Capacitance CO 5, 6, 7, 9 2.9 pF Test Fixture Shunt Inductance LTEST 2, 7 11.5679 nH Lid Symbolization (in Addition to Lot and/ or Date Code) 197 • Ideal for European 868.95 MHz Transmitters • Very Low Series Resistance • Quartz Stability • Surface-Mount Ceramic Case with 21 mm2 Footprint • Complies with Directive 2002/95/EC (RoHS) The RO2156A 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 operat- ing at 868.95 MHz. This SAW is designed specifically for remote-control and wireless security transmitters operating under ETSI-ETS 300 220 in Europe and under FTZ 17 TR 2100 in Germany. Absolute Maximum Ratings Rating Value Units CW RF Power Dissipation +5 dBm DC Voltage Between Terminals ±30 VDC Case Temperature -40 to +85 °C Soldering Temperature (10 seconds / 5 cycles max.) 260 °C 868.95 MHz SAW Resonator RO2156A RO2156A-1 RO2156A-2 CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. Notes: 1. Lifetime (10 year) frequency aging. 2. 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. 3. One or more of the following United States patents apply: 4,454,488 and 4,616,197. 4. Typically, equipment utilizing this device requires emissions testing and gov- ernment approval, which is the responsibility of the equipment manufacturer. 5. Unless noted otherwise, case temperature TC = +25°C±2°C for all specifica- tions. 6. The design, manufacturing process, and specifications of this device are sub- ject to change without notice. 7. Derived mathematically from one or more of the following directly measured parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO. 8. Turnover temperature, TO, is the temperature of maximum (or turnover) fre- quency, fO. The nominal frequency at any case temperature, TC, may be cal- culated from: f= fO [1- FTC (TO -TC) 2]. 9. 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 “NC” pads unconnected. Case parasitic capacitance is approximately 0.05pF. Transducer parallel capacitance can be calculated as: CP ≈ CΟ − 0.05 pF. SM-2 Case |
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