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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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B3787 датащи(PDF) 3 Page - EPCOS |
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B3787 датащи(HTML) 3 Page - EPCOS |
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3 / 10 page  3 December 17, 2012 B3787 313.85 / 315.00 MHz SAW Components SAW RF filter Data sheet Please read cautions and warnings and important notes at the end of this document. Characteristics Temperature range for specification: T = –40 ˚C to +105 ˚C Terminating source impedance: ZS =50 Ω and matching network Terminating load impedance: ZL =50 Ω and matching network min. typ. @ 25 ˚C max. Pass band 1 Center frequency fC1 — 313.85 — MHz Minimum insertion attenuation α min1 incl. loss in matching elements (QL = 42) — 2.6 3.2 dB excl. loss in matching elements — 1.6 2.2 dB Pass band (relative to α min1) 313.50 ... 314.20 MHz — 1.0 1.5 dB 313.47 ... 314.23 MHz — 1.6 3.0 dB Pass band 2 Center frequency fC2 — 315.00 — MHz Minimum insertion attenuation α min2 incl. loss in matching elements (QL = 42) — 2.7 3.3 dB excl. loss in matching elements — 1.7 2.3 dB Pass band (relative to α min2) 314.85 ... 315.15 MHz — 1.0 1.5 dB 314.82 ... 315.18 MHz — 1.5 3.0 dB Relative attenuation (relative to α min1) α rel 10.00 ... 250.00 MHz 50 56 — dB 250.00 ... 280.00 MHz 44 50 — dB 280.00 ... 300.00 MHz 38 44 — dB 300.00 ... 307.00 MHz 32 38 — dB 307.00 ... 312.00 MHz 20 30 — dB 312.00 ... 312.60 MHz 17 23 — dB 314.50 ... 314.60 MHz — 6 — dB 315.80 ... 317.00 MHz 15 21 — dB 317.00 ... 319.00 MHz 28 34 — dB 319.00 ... 322.00 MHz 16 22 — dB 322.00 ... 326.00 MHz 28 34 — dB 326.00 ... 340.00 MHz 35 41 — dB 340.00 ... 360.00 MHz 42 48 — dB 360.00 ... 700.00 MHz 48 54 — dB 700.00 ... 1700.00 MHz 52 60 — dB 1700.00 ... 2500.00 MHz 34 40 — 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 — 600 || 4.0 — Ω || pF Output: ZOUT =ROUT || COUT — 600 || 4.0 — Ω || pF |
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