RO3073E-14

RO3073E-14 • • • • • RoHS Ideal for 315 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 Compliant 315.00 MHz SAW Resonator The RO3073E-14 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 operating at approximately 315.00 MHz. This SAW is designed for automotive keyless-entry applications operating in the USA under FCC Part 15, in Canada under IC RSS-210, and in Italy. Absolute Maximum Ratings Rating Value Units 12 VDC Storage Temperature Range -40 to +125 °C Operating Temperature Range -40 to +105 °C 260 °C Input Power Level 0 DC Voltage Soldering Temperature (10 seconds / 5 cycles maximum) SM3030-6 Case 3.0 X 3.0 dBm Electrical Characteristics Characteristic Frequency (+25 °C) Sym fC Absolute Frequency Insertion Loss Temperature Stability Frequency Aging 314.900 1.6 Unloaded Q QU 8200 50W Loaded Q QL 1350 Turnover Temperature TO Turnover Frequency fO fC Frequency Temperature Coefficient FTC 0.032 Absolute Value during the First Year |fA| 10 10 25 Maximum Units ±100 kHz 2.4 dB 35 °C 315.100 1.0 MHz ppm/°C2 ppm/yr M Motional Resistance RM 19.8  Motional Inductance LM 82 µH Motional Capacitance CM 3.1 fF CO 4.1 pF LTEST 63 nH Shunt Static Capacitance Test Fixture Shunt Inductance Lid Symbolization StandardReel Quantity Typical IL DC Insulation Resistance between Any Two Terminals RF Equivalent RLC Model Minimum fC Tolerance from 315.00 MHz Quality Factor Notes 908, YWWS Reel Size 13 Inch 4000 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. © 2004 by RFM Integrated Device, Inc. RO3073E-14 (R) 09/20/2021 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. B 1 A 1 NC 2 Terminal 3 NC 4 NC 5 Terminal 6 NC C G 6 2 50  Source at F C E F P INCIDENT Low-Loss Matching Network to 50  P REFLECTED 1 6 2 3 5 4 Typical Application Circuits H 6 5 Power Test Connection Typical Low-Power Transmitter Application 1 5 2 Modulation Input I 200k  +9VDC C1 47 L1 (Antenna) 4 3 3 4 D 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 mm Output 200k  Inches +VDC Min Nom Max Min Nom Max 2.87 2.87 1.12 0.77 2.67 1.47 0.72 1.37 0.47 1.17 3.0 3.0 1.25 0.90 2.80 1.6 0.85 1.5 0.60 1.30 3.13 3.13 1.38 1.03 2.93 1.73 0.98 1.63 0.73 1.43 0.113 0.113 0.044 0.030 0.105 0.058 0.028 0.054 0.019 0.046 0.118 0.118 0.049 0.035 0.110 0.063 0.033 0.059 0.024 0.051 0.123 0.123 0.054 0.040 0.115 0.068 0.038 0.064 0.029 0.056 C1 1 6 2 3 5 4 C2 ROXXXXC Bottom View RF Bypass Equivalent LC Model 0.05 pF* Typical Test Circuit Cp The test circuit inductor, LTEST, is tuned to resonate with the static capacitance, CO, at FC. Rm Electrical Test +VDC L1 Lm Co = Cp + 0.05 pF *Case Parasitics 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 ) © 2004 by RFM Integrated Device, Inc. RO3073E-14 (R) 09/20/2021 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. © 2004 by RFM Integrated Device, Inc. RO3073E-14 (R) 09/20/2021 Page 3 of 3 www.rfmi.co