RO3073A

RO3073A • • • • • • • • Designed for 315.0 MHz Transmitters Very Low Series Resistance Quartz Stability Surface-mount Ceramic Case Complies with Directive 2002/95/EC (RoHS) Tape and Reel Standard per ANSI/EIA-481 Moisture Sensitivity Level: 1 AEC-Q200 Qualified RoHS Compliant 315.0 MHz SAW Resonator The RO3073A is a one-port surface-acoustic-wave (SAW) resonator packaged in a surface-mount ceramic case. It provides reliable, fundamental-mode quartz frequency stabilization of fixed-frequency transmitters operating at 315.0 MHz. This SAW is designed specifically for remote control and wireless security transmitters. Absolute Maximum Ratings Rating Value CW RF Power Dissipation (See: Typical Test Circuit) +0 dBm DC Voltage Between Terminals (Observe ESD Precautions) ±30 VDC -40 to +85 °C 260 °C Case Temperature Soldering Temperature (10 seconds / 5 cycles maximum) SM5035-4 Units Electrical Characteristics Characteristic Center Frequency, +25 °C Sym fC Absolute Frequency Insertion Loss Temperature Stability Frequency Aging Typical 314.925 IL 1.5 Unloaded Q QU 8000 50 Loaded Q QL 1300 Turnover Temperature TO Turnover Frequency fO fC Frequency Temperature Coefficient FTC 0.032 Absolute Value during the First Year |fA| DC Insulation Resistance between Any Two Terminals RF Equivalent RLC Model Minimum fC Tolerance from 315.0 MHz Quality Factor Notes 10 25 10 1.0 Maximum Units 315.075 MHz ±75 kHz 2.2 dB 40 °C ppm/°C2 ppm/yr M Motional Resistance RM 19.4  Motional Inductance LM 78.4 µH Motional Capacitance CM 3.3 fF Shunt Static Capacitance CO 4.1 pF LTEST 64.2 nH Test Fixture Shunt Inductance Lid Symbolization (in addition to Lot and/or Date Codes) 656, YYWWS 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. RO3073A (R) 12/07/2021 Page 1 of 3 www.rfmi.co Electrical Connections Equivalent RLC Model 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. C Terminal Case Ground Case Ground P L Terminal C C C S C M C R M = 0 .0 5 p F (C a s P a r a s t c s ) = S A W S ta t c C a p a c ta n c = C S + C P P S M Temperature Characteristics The test circuit inductor, LTEST, is tuned to resonate with the static capacitance, CO, at FC. ELECTRICAL TEST fC = f O , T C = T O -50 -50 -100 -100 -150 -150 -200 -80 -60 -40 -20 Case -200 0 +20 +40 +60 +80 T = TC - T O ( °C ) To 50  Network Analyzer From 50  Network Analyzer 0 0 (f-fo ) / fo (ppm) Typical Test Circuit The curve shown on the right accounts for resonator contribution only and does not include LC component temperature contributions. T o p V ie w S id e V ie w B C B o tto m V ie w E ) ) 1 A POWER TEST P INCIDENT 50  Source P at F C REFLECTED CW RF Power Dissipation = Low-Loss Matching Network to 50  2 Terminal 1 ) D Terminal P INCIDENT - P REFLECTED I Typical Application Circuits I H Typical Low-Power Transmitter Application H J H +9VDC Modulation Input G NC NC 200k  K C1 47 L1 (Antenna) L C2 RF Bypass RO3XXXA Bottom View Dimensions 470 A Typical Local Oscillator Applications Output +VDC C1 +VDC L1 Millimeters Inches Min Nom Max Min Nom Max 4.87 5.00 5.13 0.191 0.196 0.201 B 3.37 3.50 3.63 0.132 0.137 0.142 C 1.45 1.53 1.60 0.057 0.060 0.062 D 1.35 1.43 1.50 0.040 0.057 0.059 E 0.67 0.80 0.93 0.026 0.031 0.036 F 0.37 0.50 0.63 0.014 0.019 0.024 G 1.07 1.20 1.33 0.042 0.047 0.052 C2 RO3XXXA Bottom View ©2010-2014 by RFM Integrated Device, Inc. RO3073A (R) 12/07/2021 RF Bypass 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. ©2010-2014 by RFM Integrated Device, Inc. RO3073A (R) 12/07/2021 Page 3 of 3 www.rfmi.co