RO3118E

• • • • • Ideal for 318 MHz Remote Control and Security Transmitters Very Low Series Resistance Quartz Stability Complies with Directive 2002/95/EC (RoHS) Tape and Reel Standard per ANSI/EIA-481 RO3118E RoHS Compliant 318.0 MHz SAW Resonator The RO3118E 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 transmitters and local oscillators operating at 318 MHz. Absolute Maximum Ratings Rating Value Units Input Power Level 0 dBm DC Voltage 12 VDC Storage Temperature Range -40 to +125 °C Operating Temperature Range -40 to +105 °C 260 °C Soldering Temperature (10 seconds / 5 cycles maximum) SM3030-6 Case 3.0 X 3.0 Electrical Characteristics Characteristic Frequency, +25 °C Sym fC Absolute Frequency Insertion Loss Temperature Stability Frequency Aging Minimum IL 1.6 Unloaded Q QU 9000 50Loaded Q QL Turnover Temperature TO Turnover Frequency fO fC Frequency Temperature Coefficient FTC 0.032 Absolute Value during the First Year |fA| Units 318.075 MHz ±75 kHz 2.2 dB 40 °C 1500 10 25 10 1.0 ppm/°C2 ppm/yr M Motional Resistance RM 21  Motional Inductance LM 93 µH Motional Capacitance CM 2.7 fF Shunt Static Capacitance CO 2.8 pF 82 nH LTEST Test Fixture Shunt Inductance Lid Symbolization: Y = Year, WW = Week, S = Shift) Standard Reel Quantity Maximum 317.925 DC Insulation Resistance between Any Two Terminals RF Equivalent RLC Model Typical fC Tolerance from 318.0 MHz Quality Factor Notes 687, YWWS Reel Size 7 Inch 500 Pieces / Reel Reel Size 13 Inch 3000 Pieces / Reel CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. NOTES: 1. The design, manufacturing process, and specifications of this device are subject to change. 2. US or International patents may apply. 3. RoHS compliant from the first date of manufacture. ©2010-2014 by RFM Integrated Device, Inc. RO3118E (R) 09/21/2021 Page 1 of 3 ww.rfmi.co 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 NC 2 Terminal 3 NC 4 NC 5 Terminal 6 NC 6 A 2 5 3 4 E F The curve shown accounts for resonator contribution only and does not include external LC component temperature effects. fC = f O , T C = T O 0 G C 1 Temperature Characteristics Connection 1 0 -50 -50 -100 -100 -150 -150 (f-fo ) / fo (ppm) Electrical Connections -200 -80 -60 -40 -20 H 6 1 5 2 4 3 -200 0 +20 +40 +60 +80 T = TC - T O ( °C ) I Characterization Test Circuit Inductor LTEST is tuned to resonate with the static capacitance, CO, at FC. D J 6 1 From 50  Network Analyzer 5 2 4 3 To 50  Network Analyzer K L N K N Power Dissipation Test O N M M 50  Source at F C Case and Typical PCB Land Dimensions Ref A B C D E F G H I J K L M N O Min 2.87 2.87 1.12 0.77 2.67 1.47 0.72 1.37 0.47 1.17 mm Nom 3.00 3.00 1.25 0.90 2.80 1.60 0.85 1.50 0.60 1.30 3.20 1.70 1.05 0.81 0.38 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 P INCIDENT Low-Loss Matching Network to 50  P REFLECTED Inches Nom 0.118 0.118 0.049 0.035 0.110 0.063 0.033 0.059 0.024 0.051 0.126 0.067 0.041 0.032 0.015 Max 0.123 0.123 0.054 0.040 0.115 0.068 0.038 0.064 0.029 0.056 1 6 5 4 Typical Low-Power Transmitter Application Modulation Input 200k  +9VDC C1 47 L1 (Antenna) 1 6 2 3 5 4 C2 ROXXXXC Bottom View RF Bypass 470 Typical Local Oscillator Application Output 200k  C1 Equivalent RLC Model +VDC L1 0.05 pF* Cp Lm 3 Example Application Circuits +VDC Rm 2 1 Co = Cp + 0.05 pF 6 2 3 5 4 C2 *Case Parasitics ROXXXXC Bottom View RF Bypass Cm ©2010-2014 by RFM Integrated Device, Inc. RO3118E (R) 09/21/2021 Page 2 of 3 ww.rfmi.co Recommended Reflow Profile 1. Preheating shall be fixed at 150~180ºC for 60~90 seconds. 2. Ascending time to preheating temperature 150ºC shall be 30 seconds min. 3. Heating shall be fixed at 220ºC for 50~80 seconds and at 260ºC +0/-5ºC peak (10 seconds). 4. Time: 5 times maximum. ©2010-2014 by RFM Integrated Device, Inc. RO3118E (R) 09/21/2021 Page 3 of 3 ww.rfmi.co