RO3118E-1

• • • • • Ideal for 318 MHz Automotive-Keyless-Entry Transmitters Very Low Series Resistance Quartz Stability Complies with Directive 2002/95/EC (RoHS) Tape and Reel Standard per ANSI/EIA-481 RO3118E-1 RoHS Compliant 318.0 MHz SAW Resonator The RO3118E-1 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 local oscillators operating at approximately 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 SM3030-6 Case 260 °C 3.0 X 3.0 Soldering Temperature (10 seconds / 5 cycles max.) Characteristic Frequency (+25 °C) Sym fC Absolute Frequency Temperature Stability IL 1.6 Unloaded Q QU 9000 50W Loaded Q QL Turnover Temperature TO 25 fO fC FTC 0.032 Absolute Value during the First Year |fA| Units MHz ±50 kHz 2.2 dB 40 °C 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 89 nH LTEST Test Fixture Shunt Inductance Lid Symbolization: Y = Year, WW = Week, S = Shift) Standard Reel Quantity Maximum 318.050 1500 10 Frequency Temperature Coefficient DC Insulation Resistance between Any Two Terminals RF Equivalent RLC Model Typical fC Turnover Frequency Frequency Aging Minimum 317.950 Tolerance from 315.0 MHz Insertion Loss Quality Factor Notes 765, 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. © 2007 by RFM Integrated Device, Inc. RO3118E-1 (R) 09/21/2021 Page 1 of 3 www.rfmi.co 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. Power Test Connection 1 NC 2 Terminal 3 NC 4 NC 5 Terminal 6 NC 50  Source at F C P INCIDENT Low-Loss Matching Network to 50  P REFLECTED 1 6 2 3 5 4 Typical Application Circuits B C 1 G 6 H 6 Typical Low-Power Transmitter Application 1 Modulation Input A 2 5 3 4 E F 5 2 4 3 D 200k  +9VDC C1 I 47 L1 (Antenna) 1 6 J 2 3 5 4 C2 ROXXXXC Bottom View RF Bypass 470 Typical Local Oscillator Application 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 Output 200k  +VDC 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 C1 +VDC L1 Max 0.123 0.123 0.054 0.040 0.115 0.068 0.038 0.064 0.029 0.056 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 Cp *Case Parasitics The test circuit inductor, LTEST, is tuned to resonate with the static capacitance, CO, at FC. Rm Electrical Test Lm Cm Temperature Characteristics The curve shown on the right accounts for resonator contribution only and does not include LC component temperature contributions. 5 2 4 3 To 50  Network Analyzer 0 -50 -50 -100 -100 -150 -150 (f-fo ) / fo (ppm) 1 From 50  Network Analyzer fC = f O , T C = T O 0 6 -200 -80 -60 -40 -20 -200 0 +20 +40 +60 +80 T = T C - T O ( °C ) © 2007 by RFM Integrated Device, Inc. RO3118E-1 (R) 09/21/2021 Page 2 of 3 www.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. © 2007 by RFM Integrated Device, Inc. RO3118E-1 (R) 09/21/2021 Page 3 of 3 www.rfmi.co