* * * * Ideal for 916.5 MHz FCC Part 15 Transmitters Very Low Series Resistance Quartz Stability Complies with Directive 2002/95/EC (RoHS) RO3144D RO3144D-1 RO3144D-2 916.5 MHz SAW Resonator Pb The RO3144D 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. Absolute Maximum Ratings Rating Value Units 10 dBm Input Power Level DC Voltage Storage Temperature 12 VDC -40 to +85 C 260 C Soldering Temperature (10 seconds / 5 cycles max.) Electrical Characteristics Characteristic Sym Frequency (+25 C) Nominal Frequency Notes RO3144D fC RO3144D-1 RO3144D-2 Tolerance from 916.5 MHz 2, 3, 4, 5 RO3144D SM3838-6 Case 3.8 X 3.8 Minimum Typical 916.700 916.350 916.650 916.400 916.600 Frequency Aging IL 2, 5, 6 Unloaded Q QU 50 Loaded Q QL Turnover Temperature TO Turnover Frequency fO FTC Absolute Value during the First Year |fA| Motional Resistance RM Motional Inductance LM Motional Capacitance CM Transducer Static Capacitance CO LTEST 2.5 dB 700 1 5 Lid Symbolization Standard Reel Quantity 5, 6, 7 6, 7, 8 Frequency Temperature Coefficient Test Fixture Shunt Inductance 1.20 6800 10 DC Insulation Resistance between Any Two Terminals RF Equivalent RLC Model kHz 100 Insertion Loss Temperature Stability MHz 150 RO3144D-2 Quality Factor Units 200 fC RO3144D-1 Maximum 916.300 25 40 C fc MHz 0.032 ppm/C2 ppm 10 1.0 M 11.8 5, 6, 7, 9 14 H 2.1 fF 5, 6, 9 2.1 pF 2, 7 14.3 nH RO3144D 692, RO3144D-1 767, RO3144D-2 768 / YWWS Reel Size 7 Inch 10 Reel Size 13 Inch 500 Pieces / Reel 3000 Pieces / Reel CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. Notes: 1. 2. 3. 4. 5. 6. 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. www.RFM.com E-mail: info@rfm.com (c)2008 by RF Monolithics, Inc. 7. 8. 9. 10. 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 Per ANSI/EIA 481. Page 1 of 2 RO3144D - 3/27/08 Power Test Electrical Connections Pin 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. B Connection 1 NC 2 Terminal 3 NC 4 NC 5 Terminal 6 NC C 1 G 50 Source at F C Low-Loss Matching Network to 50 P REFLECTED 1 6 2 3 5 4 Typical Application Circuits H Typical Low-Power Transmitter Application 6 6 A 2 P INCIDENT 5 E 1 5 2 4 3 200k I +9VDC Modulation Input C1 47 L1 (Antenna) 3 4 1 D J 6 2 3 5 4 C2 ROXXXXC Bottom View RF Bypass 470 Typical Local Oscillator Application Case Dimensions Output 200k mm Dimension A B C D E G H I J +VDC Inches Min Nom Max Min Nom Max 3.60 3.60 1.00 0.95 2.39 0.90 1.90 0.50 1.70 3.80 3.80 1.20 1.10 2.54 1.0 2.0 0.6 1.8 4.0 4.0 1.40 1.25 2.69 1.10 2.10 0.70 1.90 0.14 0.14 0.04 0.033 0.090 0.035 0.75 0.020 0.067 0.15 0.15 0.05 0.043 0.10 0.04 0.08 0.024 0.07 0.16 0.16 0.055 0.05 0.110 0.043 0.83 0.028 0.075 C1 +VDC L1 1 6 2 3 5 4 C2 ROXXXXC Bottom View RF Bypass Equivalent LC Model 0.05 pF* Typical Test Circuit Co = Cp + 0.05 pF The test circuit inductor, LTEST, is tuned to resonate with the static capacitance, CO, at FC. Cp Electrical Test Rm Lm *Case Parasitics 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 6 0 1 5 2 4 3 To 50 Network Analyzer 0 -50 -50 -100 -100 -150 -150 (f-fo ) / fo (ppm) From 50 Network Analyzer -200 -80 -60 -40 -20 -200 0 +20 +40 +60 +80 T = T C - T O ( C ) www.RFM.com E-mail: info@rfm.com (c)2008 by RF Monolithics, Inc. Page 2 of 2 RO3144D - 3/27/08