B3845

SAW Components Preliminary Data Sheet B3845 SAW Components Low-Loss Filter Preliminary Data Sheet B3845 427,25 MHz Ceramic package QCC12B Features q Low-loss filter q Temperature stable q Package for Surface Mounted Technology (SMT) q Hermetically sealed ceramic package Terminals q Gold-plated Dimensions in mm, approx. weight 0,2 g Pin configuration 10 12 4 6 3, 9 1, 2, 7, 8 Input Input ground or bal. input Output Output ground or bal. output Case - ground To be grounded Type B3845 Ordering code B39421B3845Z910 Marking and Package according to C61157A0007A052 Packing according to F61074V8038Z000 Electrostatic Sensitive Device (ESD) Maximum ratings Operable temperature range Storage temperature range DC voltage Source power T Tstg VDC Ps – 45/+ 85 – 40/+ 85 0 10 ˚C ˚C V dBm source impedance 75 Ω 2 Apr 22, 2002 SAW Components Low-Loss Filter Preliminary Data Sheet Characteristics Operating temperature: Terminating source impedance: Terminating load impedance: T = -40 ... +85 ˚C ZS = 75 Ω and matching network ZL = 75 Ω and matching network min. Nominal frequency Insertion attenuation at fN (T=25 ˚C) Variation of insertion att. (rel. to αN) Frequency response 3 dB Lower frequency 3 dB Upper frequency 35 dB Lower frequency 35 dB Upper frequency Amplitude ripple (peak to adjacent valley) fN ± 100 kHz Relative attenuation fN - 200,0 MHz ... fN - 10,0 MHz fN - 10,0 MHz ... fN - 3,0 MHz fN + 3,0 MHz ... fN + 10,0 MHz fN + 10,0 MHz ... fN + 200,0 MHz Temperature coefficient of frequency Turnover temperature 1) B3845 427,25 MHz typ. 427,25 6,5 — max. — 8,0 ±0,9 MHz dB dB fN αN αrel — 6,0 — fL 3dB fU 3dB fL35dB fU35dB — 427,75 424,25 — 426,55 428,25 425,30 429,50 426,75 — — 430,25 MHz MHz MHz MHz — αrel 40 35 35 40 0,3 0,5 dB 48 42 48 52 – 0,036 25 — — — — — — dB dB dB dB ppm/K2 ˚C TCf T0 — — Matching circuit: Cp1 = 10pF 2) Ls2 = 22nH 2) Ls3 = 15nH 2) Cp4 = 12pF 2) 1) Temperature 2) dependance of fc: fc(TA) = fc(T0)(1 + TCf(TA – T0)2) Element values depend on PCB layout 3 Apr 22, 2002 SAW Components Low-Loss Filter Preliminary Data Sheet Normalized frequency response B3845 427,25 MHz Normalized frequency response 4 Apr 22, 2002 SAW Components Low-Loss Filter Preliminary Data Sheet B3845 427,25 MHz Published by EPCOS AG Surface Acoustic Wave Components Division, SAW MC IS, P.O. Box 80 17 09, 81617 Munich, GERMANY © EPCOS AG 2002. Reproduction, publication and dissemination of this brochure and the information contained therein without EPCOS’ prior express consent is prohibited. Purchase orders are subject to the General Conditions for the Supply of Products and Services of the Electrical and Electronics Industry recommended by the ZVEI (German Electrical and Electronic Manufacturers’ Association), unless otherwise agreed. This brochure replaces the previous edition. For questions on technology, prices and delivery please contact the Sales Offices of EPCOS AG or the international Representatives. Due to technical requirements components may contain dangerous substances. For information on the type in question please also contact one of our Sales Offices. 5 Apr 22, 2002