TC0278A

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Tel: +44 1460 256 100 Fax: +44 1460 256 101 www.golledge.com Golledge Electronics Ltd Eaglewood Park, ILMINSTER Somerset, TA19 9DQ, UK SAW Resonator 915.0MHz Model: TC0278A Part No: MP02715 Rev No: 1 TC0278A v1 1 A. FEATURES: One-Port Resonator B. MAXIMUM RATING: 1. Input Power Level: 0dBm 2. DC voltage: 3V 3. Operating Temperature: -40°C to +85°C 4. Storage Temperature: -40°C to +85°C C. ELECTRICAL CHARACTERISTICS: Reference Temperature TA = 25°C Characteristic Units Min. Typ. Max. Center frequency Fc MHz 914.9 915 915.1 Insertion Loss IL dB - 1.1 2.0 Unload quality factor QU 5000 6200 - Ageing of fc ppm/yr - - ±10 Motional capacitance C1 fF - 1.39 - Motional inductance L1 μH - 21.8 - Motional resistance R1 Ohm - 20.3 - Parallel capacitance Co pF - 2.6 - Frequency Temperature coefficient (TCf) ppm/c*2 - 0.032 - Turnover To deg.C 10 25 40 Package size SMD 3.8 X 3.8 X 1.4mm Temperature dependence of fc: fc (TA) = fc (TO) (1+TCf (TA-TO)2)

Tel: +44 1460 256 100 Fax: +44 1460 256 101 www.golledge.com Golledge Electronics Ltd Eaglewood Park, ILMINSTER Somerset, TA19 9DQ, UK SAW Resonator 915.0MHz Model: TC0278A Part No: MP02715 Rev No: 1 TC0278A v1 2 D. OUTLINE DRAWING: E. EQUVIRENT CIRCUIT: One-Port Resonator: R1 C1 L1 Source Impedance Load Impedance 50Ω 50Ω B E

Tel: +44 1460 256 100 Fax: +44 1460 256 101 www.golledge.com Golledge Electronics Ltd Eaglewood Park, ILMINSTER Somerset, TA19 9DQ, UK SAW Resonator 915.0MHz Model: TC0278A Part No: MP02715 Rev No: 1 TC0278A v1 3 F. FREQUENCY CHARACTERISTICS: -25 -20 -15 -10 dB Frequency (Center Frequency 915MHz Span 3MHz) Resonator 915MHz F requency Charactristics (S21) G. TEST CIRCUIT:  Network analyzer  SAW Resonator B E A、C、D、F To 50Ω Network Analyzer From 50Ω Network Analyzer

Tel: +44 1460 256 100 Fax: +44 1460 256 101 www.golledge.com Golledge Electronics Ltd Eaglewood Park, ILMINSTER Somerset, TA19 9DQ, UK SAW Resonator 915.0MHz Model: TC0278A Part No: MP02715 Rev No: 1 TC0278A v1 4 H. PCB FOOTPRINT:

Tel: +44 1460 256 100 Fax: +44 1460 256 101 www.golledge.com Golledge Electronics Ltd Eaglewood Park, ILMINSTER Somerset, TA19 9DQ, UK SAW Resonator 915.0MHz Model: TC0278A Part No: MP02715 Rev No: 1 TC0278A v1 5 I. PACKING: 1. Reel Dimension 2. Tape Dimension Direction of feed