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B39231-B4846-U310 Datasheet(PDF) 3 Page - EPCOS |
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B39231-B4846-U310 Datasheet(HTML) 3 Page - EPCOS |
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3 / 7 page  3 Feb 03, 2005 SAW Components B4846 225,0 MHz Low-Loss Filter for Mobile Communication Data Sheet Characteristics Operating temperature range: T = 25 ˚C Terminating source impedance: ZS = 860 Ω || -2,0pf Terminating load impedance: ZL = 860 Ω || -2,0pf min. typ. max. Nominal frequency fc — 225,01 — MHz Minimum insertion attenuation α min 3,0 3,9 4,5 dB (including loss in baluns and matching elements) Amplitude ripple (p-p) ∆α fN - 67,5 kHz ... fN + 67,5 kHz — 0,6 1,6 dB fN - 80,0 kHz ... fN + 80,0 kHz — 0,7 3,0 dB Group delay ripple (p-p) ∆τ fN - 50,0 kHz ... fN + 50,0 kHz — 0,2 1,3 µs fN - 67,5 kHz ... fN + 67,5 kHz — 0,3 1,5 µs fN - 80,0 kHz ... fN + 80,0 kHz — 0,6 1,8 µs Relative attenuation (relative to α min) α rel fN - 15,00 MHz ... fN - 5,00 MHz 42 45 — dB fN - 5,00 MHz ... fN - 2,00 MHz 42 46 — dB fN - 2,00 MHz ... fN - 0,60 MHz 36 37 — dB fN - 0,60 MHz ... fN - 0,40 MHz 26,5 29 — dB fN - 0,40 MHz ... fN - 0,20 MHz 6,5 12 — dB fN + 0,20 MHz ... fN + 0,40 MHz 6,5 12 — dB fN + 0,40 MHz ... fN + 0,60 MHz 26,5 29 — dB fN + 0,60 MHz ... fN + 2,00 MHz 36 37 — dB fN + 2,00 MHz ... fN + 5,0 MHz 43 47 — dB fN + 3,00 MHz ... fN + 15,0 MHz 42 45 — dB Impedance within the passband Input: ZIN = RIN || CIN — 860 || 2,0 — Ω || pF Output: ZOUT = ROUT || COUT — 860 || 2,0 — Ω || pF Temperature coefficient of frequency 1) TCf — -0,036 — ppm/K2 Frequency inversion point T0 —25 — ˚C 1) Temperature dependence of fc: fc(T) = fc(T0)(1 + TCf(T – T0)2) |
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