RFM products are now Murata products. RO3188A • • • • • Designed for 390.0 MHz Transmitters Very Low Series Resistance Quartz Stability Surface-mount Ceramic Case Complies with Directive 2002/95/EC (RoHS) 390.0 MHz SAW Resonator Pb The RO3188A 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 390.0 MHz. Absolute Maximum Ratings Rating Value CW RF Power Dissipation (See: Typical Test Circuit) DC voltage Between Terminals (Observe ESD Precautions) Case Temperature Quality Factor Temperature Stability Frequency Aging 5,6,7 Unloaded Q QU QL Turnover Temperature TO Turnover Frequency fO Frequency Temperature Coefficient FTC Absolute Value during the First Year |fA| Minimum 1.3 LM CM Shunt Static Capacitance CO LTEST Maximum Units 390.100 MHz ±100 kHz 2.0 dB 40 °C 12647 1532 6,7,8 25 fC 0.032 ≤10 1 1.0 RM Motional Inductance Typical 389.900 10 5 Motional Capacitance Test Fixture Shunt Inductance 2,3,4,5 2,5,6 50 Ω Loaded Q Motional Resistance Notes IL DC Insulation Resistance between Any Two Terminals RF Equivalent RLC Model VDC °C ΔfC Insertion Loss ±30 °C fC Tolerance from 390.0 MHz dBm 260 Sym Center Frequency, +25 °C +0 -40 to +85 Soldering Temperature (10 seconds / 5 cycles maximum) Characteristic SM5035-4 Units 5, 7, 9 ppm/°C2 ppm/yr MΩ 13.8 Ω 71.2 µH 2.3 fF 5, 6, 9 3.0 pF 2, 7 55 nH Lid Symbolization (in addition to Lot and/or Date Codes) 797 // YYWWS CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. ©2010-2015 by Murata Electronics N.A., Inc. RO3188A (R) 2/10/15 Page 1 of 3 www.murata.com NOTES: 1. 2. 3. 4. 5. 6. 7. Frequency aging is the change in fC with time and is specified at +65 °C or less. Aging may exceed the specification for prolonged temperatures above +65 °C. 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 Ω 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 = +25 ± 2 °C. The design, manufacturing process, and specifications of this device are subject to change without notice. Derived mathematically from one or more of the following directly measured parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO. 8. Turnover temperature, TO, is the temperature of maximum (or turnover) frequency, fO. The nominal frequency at any case temperature, TC, may be 9. 10. 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. Electrical Connections 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. Typical Local Oscillator Applications Terminal Case Ground Case Ground Output +VDC C1 +VDC Terminal L1 C2 Typical Test Circuit The test circuit inductor, LTEST, is tuned to resonate with the static capacitance, CO, at FC. RO3XXXA Bottom View RF Bypass Equivalent RLC Model ELECTRICAL TEST C To 50 Ω Network Analyzer From 50 Ω Network Analyzer P L M C P C C C C S R M S O = 0 .0 5 p F (C a s e P a r a s itic s ) = S A W S ta tic C a p a c ita n c e = C S + C P M Temperature Characteristics POWER TEST P INCIDENT 50 Ω Source P at F C REFLECTED CW RF Power Dissipation = Low-Loss Matching Network to 50 Ω Terminal 0 -50 -50 -100 -100 -150 -150 -200 -80 -60 -40 -20 NC NC fC = f O , T C = T O 0 (f-fo ) / fo (ppm) The curve shown on the right accounts for resonator contribution only and does not include LC component temperature contributions. -200 0 +20 +40 +60 +80 ΔT = TC - T O ( °C ) Terminal P INCIDENT - P REFLECTED Typical Application Circuits Typical Low-Power Transmitter Application +9VDC Modulation Input 200k Ω C1 47 L1 (Antenna) C2 RF Bypass RO3XXXA Bottom View 470 ©2010-2015 by Murata Electronics N.A., Inc. RO3188A (R) 2/10/15 Page 2 of 3 www.murata.com Case T o p V ie w S id e V ie w B C B o tto m V ie w E (3 x ) 4 F (4 x ) A 1 3 2 G (1 x ) D H I I I H H J H K L PCB Land Pattern Top View Dimensions Millimeters Min Nom Inches Max Min Nom Max A 4.87 5.00 5.13 0.191 0.196 B 3.37 3.50 3.63 0.132 0.137 0.201 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 H - 1.04 - - 0.041 - I - 1.46 - - 0.058 - J - 3.01 - - 0.119 - K - 1.44 - - 0.057 - L - 1.92 - - 0.076 - ©2010-2015 by Murata Electronics N.A., Inc. RO3188A (R) 2/10/15 Page 3 of 3 www.murata.com