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B39321-B3761-Z810 Datasheet(PDF) 3 Page - EPCOS |
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B39321-B3761-Z810 Datasheet(HTML) 3 Page - EPCOS |
3 / 6 page 3 Nov 04, 2005 SAW Components B3761 315,00 MHz Low-loss Filter Data Sheet Characteristics Reference temperature: TA = –45 ... +95˚C Terminating source impedance: ZS = 50 Ω and matching network Terminating load impedance: ZL = 50 Ω and matching network 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 the SAW filter is removed and input imped- ance into the input matching / output matching network is calculated. The conjugate complex value of these characteristic impedances are the input and output imped- ances for flat passband. For more details, we refer to EPCOS application note #4. min. typ. max. Center frequency fC — 315,00 — MHz (center frequency between 3 dB points) Minimum insertion attenuation α min including loss in matching elements (QL = 44) — 1,9 2,6 dB excluding loss in matching elements — 1,5 2,2 dB Passband (relative to α min) 314,85 ... 315,15 MHz — 0,5 2,0 dB 314,82 ... 315,18 MHz — 0,7 3,0 dB 314,78 ... 315,22 MHz — 1,0 6,0 dB Filter bandwidth α rel≤ 3 dB 0,54 0,59 0,64 MHz Relative attenuation (relative to α min) α rel 10,00 ... 294,50 MHz 48 53 — dB 294,50 ... 304,50 MHz 45 50 — dB 304,50 ... 312,80 MHz 25 30 — dB 312,80 ... 313,20 MHz 33 40 — dB 313,20 ... 314,30 MHz 13 18 — dB 315,70 ... 323,00 MHz 13 17 — dB 323,00 ... 335,00 MHz 38 45 — dB 335,00 ... 600,00 MHz 43 48 — dB 600,00 ...1000,00 MHz 60 70 — dB Impedance for pass band matching 1) Input: ZIN = RIN || CIN — 340 || 2,6 — Ω || pF Output: ZOUT = ROUT || COUT — 340 || 2,6 — Ω || pF |
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