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B3739 Datasheet(PDF) 4 Page - EPCOS |
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B3739 Datasheet(HTML) 4 Page - EPCOS |
4 / 11 page 4 December 17, 2009 B3739 314.90 MHz Please read cautions and warnings and important notes at the end of this document. SAW Components SAW filter Data sheet Characteristics Operating temperature range: T = –45 ˚C to +125 ˚C Terminating source impedance: ZS =50 Ω and matching network Terminating load impedance: ZL =50 Ω and matching network min. typ. @ 25 ˚C max. Center frequency fC — 314.90 — MHz Minimum insertion attenuation α min incl. loss in matching elements (QL = 42) — 2.3 3.2 dB excl. loss in matching elements — 1.3 2.2 dB Pass band (relative to α min) 314.75 ... 314.98 MHz — 0.6 2.0 dB 314.72 ... 315.01 MHz — 0.8 3.0 dB 314.68 ... 315.05 MHz — 1.2 6.0 dB Filter bandwidth α rel ≤ 3 dB 0.57 0.63 0.69 MHz Relative attenuation (relative to α min) α rel 10.00 ... 295.00 MHz 48 53 — dB 295.00 ... 307.00 MHz 43 48 — dB 307.00 ... 313.00 MHz 32 36 — dB 313.00 ... 313.90 MHz 22 29 — dB 315.90 ... 325.00 MHz 10 14 — dB 325.00 ... 336.00 MHz 38 43 — dB 336.00 ... 370.00 MHz 42 46 — dB 370.00 ... 600.00 MHz 52 57 — dB 600.00 ... 1500.00 MHz 60 65 — dB 1500.00 ... 2500.00 MHz 55 60 — dB Impedance for pass band matching1) 1) Impedance for passband matching bases on an ideal, perfect matching of the SAW filter to source- and to load impedance (here 50 Ohm). After removal of the SAW filter the input impedance of the input and output match- ing network is calculated. The conjugate complex value of these characteristic impedances are the input and output impedances for flat passband. For more details we refer to EPCOS application note #4. Input: ZIN =RIN || CIN — 610 || 2.2 — Ω || pF Output: ZOUT =ROUT || COUT — 610 || 2.2 — Ω || pF |
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