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B39431B3774Z810 Datasheet(PDF) 3 Page - TDK Electronics |
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B39431B3774Z810 Datasheet(HTML) 3 Page - TDK Electronics |
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3 / 10 page  3 December 20, 2012 B3774 433.92 MHz SAW Components SAW filter Data sheet Please read cautions and warnings and important notes at the end of this document. Characteristics Temperature range for specification: T = –45 ˚C to +95 ˚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 — 433.92 — MHz Minimum insertion attenuation α min incl. loss in matching elements (QL = 47) — 2.4 3.1 dB excl. loss in matching elements — 1.7 2.4 dB Pass band (relative to α min) 433.77 ... 434.07 MHz — 0.6 2.0 dB 433.74 ... 434.10 MHz — 0.8 3.0 dB 433.70 ... 434.14 MHz — 1.2 6.0 dB Relative attenuation (relative to α min) α rel 10.00 ... 414.00 MHz 53 57 — dB 414.00 ... 426.00 MHz 48 53 — dB 426.00 ... 430.50 MHz 24 28 — dB 430.50 ... 431.72 MHz 30 35 — dB 431.72 ... 431.97 MHz 40 52 — dB 431.97 ... 432.07 MHz 30 52 — dB 432.07 ... 432.12 MHz 25 52 — dB 432.12 ... 433.10 MHz 15 18 — dB 434.92 ... 444.00 MHz 15 20 — dB 444.00 ... 500.00 MHz 40 45 — dB 500.00 ... 1600.00 MHz 50 55 — dB 1600.00 ... 2500.00 MHz 45 50 — 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 — 240 || 3.0 — Ω || pF Output: ZOUT =ROUT || COUT — 240 || 3.0 — Ω || pF |
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