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| (R) * * * * Ideal for 916.5 MHz FCC Part 15 Transmitters Very Low Series Resistance Quartz Stability Complies with Directive 2002/95/EC (RoHS) RO2144E RO2144E-1 RO2144E-2 Pb The RO2144E is a true one-port, surface-acoustic-wave (SAW) resonator in a surface-mount ceramic case. It provides reliable, fundamental-mode stabilization of fixed-frequency transmitters operating at 916.5 MHz. This SAW is designed specifically for remote-control and data-link transmitters operating in the USA under FCC Part 15 regulations. 916.5 MHz SAW Resonator Absolute Maximum Ratings Rating Input Power Level DC Voltage Storage Temperature Operating Temperature Range Value 10 12 -40 to +125 -40 to +125 Units dBm VDC C C Electrical Characteristics Characteristic Frequency (+25 C) Nominal Frequency Sym RO2144E RO2144E-1 RO2144E-2 Tolerance from 916.5 MHz RO2144E RO2144E-1 RO2144E-2 Insertion Loss Quality Factor Temperature Stability Unloaded Q 50 Loaded Q Turnover Temperature Turnover Frequency Frequency Temperature Coefficient Frequency Aging RF Equivalent RLC Model Absolute Value during the First Year Motional Resistance Motional Inductance Motional Capacitance Transducer Static Capacitance Test Fixture Shunt Inductance Lid Symbolization Standard Reel Quantity Reel Size 7 Inch Reel Size 13 Inch 10 DC Insulation Resistance between Any Two Terminals RM LM CM CP LTEST 5, 6, 9 2, 7 5, 6, 7, 9 IL QU QL TO fO FTC |fA| 1 5 1.0 12 19.8 1.7 1.9 TBD 515 // YWWS 6, 7, 8 2, 5, 6 5, 6, 7 8000 15 1.2 8900 TBD 25 fc 0.032 10 fC fC 2, 3, 4, 5 Notes Minimum 916.300 916.350 916.405 Typical SM3030-6 Case 3.0 X 3.0 Maximum 916.700 916.650 916.595 200 150 95 1.6 dB kHz Units MHz 35 C MHz ppm/C2 ppm M 17 H fF pF nH 500 Pieces / Reel 3000 Pieces / Reel CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. Notes: 1. Frequency aging is the change in fC with time and is specified at +65C or less. Aging may exceed the specification for prolonged temperatures above +65C. Typically, aging is greatest the first year after manufacture, decreasing in subsequent years. The center frequency, fC, is measured at the minimum insertion loss point, ILMIN, with the resonator in the 50 test system (VSWR 1.2:1). The shunt inductance, LTEST, is tuned for parallel resonance with CO at fC. Typically, fOSCILLATOR or fTRANSMITTER is approximately equal to the resonator 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 = +25C2C. The design, manufacturing process, and specifications of this device are subject to change without notice. 7. 8. Derived mathematically from one or more of the following directly 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]. Typically oscillator TO is approximately equal to the specified resonator TO. 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 0.05 pF. Transducer parallel capacitance can by calculated as: CP CO - 0.05 pF. Tape and Reel Standard for ANSI / EIA 481. 2. 9. 3. 4. 5. 6. 10. RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 (c)1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: info@rfm.com Page 1 of 2 http://www.rfm.com RO2144E_RO2144E-1_RO2144E-2_042505 916.5 MHz Electrical Connections The SAW resonator is bidirectional and may be installed with either orientation. The two terminals are interchangeable and unnumbered. The callout NC indicates no internal connection. The NC pads assist with mechanical positioning and stability. External grounding of the NC pads is recommended to help reduce parasitic capacitance in the circuit. SAW Resonator Pin 1 2 3 4 5 6 Connection NC Terminal NC NC Terminal NC Power Test P INCIDENT 50 Source at F C P REFLECTED Low-Loss Matching Network to 50 1 6 2 3 5 4 Typical Application Circuits B 1 6 C 6 G H Typical Low-Power Transmitter Application 1 Modulation Input 200k C1 L1 (Antenna) +9VDC A 2 5 E F 5 2 I 47 3 4 D 4 J 3 6 ROXXXXC Bottom View 1 2 3 5 4 C2 RF Bypass 470 Typical Local Oscillator Application Output Case Dimensions Dimension A B C D E F G H I J Min 2.87 2.87 1.12 0.77 2.67 1.47 0.72 1.37 0.47 1.17 mm Nom 3.0 3.0 1.25 0.90 2.80 1.6 0.85 1.5 0.60 1.30 Max 3.13 3.13 1.38 1.03 2.93 1.73 0.98 1.63 0.73 1.43 Min 0.113 0.113 0.044 0.030 0.105 0.058 0.028 0.054 0.019 0.046 Inches Nom 0.118 0.118 0.049 0.035 0.110 0.063 0.033 0.059 0.024 0.051 Max 0.123 0.123 0.054 0.040 0.115 0.068 0.038 0.064 0.029 0.056 200k +VDC C1 L1 +VDC 1 6 2 3 5 4 C2 ROXXXXC Bottom View RF Bypass Equivalent LC Model 0.05 pF* Co = Cp + 0.05 pF Typical Test Circuit The test circuit inductor, LTEST, is tuned to resonate with the static capacitance, CO, at FC. Rm Lm Cp *Case Parasitics Electrical Test Cm Temperature Characteristics The curve shown on the right accounts for resonator contribution only and does not include LC component temperature contributions. fC = f O , T C = T O 0 6 1 0 -50 -100 -150 -200 0 +20 +40 +60 +80 From 50 Network Analyzer 5 2 To 50 Network Analyzer 4 3 (f-fo ) / fo (ppm) -50 -100 -150 -200 -80 -60 -40 -20 T = TC - T O ( C ) RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 (c)1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: info@rfm.com Page 2 of 2 http://www.rfm.com RO2144E_RO2144E-1_RO2144E-2_042505 |
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