SAW Filters for Infrastructure Systems Series/Type: B3850 The following products presented in this data sheet are being withdrawn. Ordering Code B39121B3850H510 Substitute Product Date of Withdrawal 2011-07-15 Deadline Last Orders 2011-12-31 Last Shipments 2012-03-31 For further information please contact your nearest EPCOS sales office, which will also support you in selecting a suitable substitute. The addresses of our worldwide sales network are presented at www.epcos.com/sales. SAW Components B3850 Low-Loss Filter 125,00 MHz Data Sheet Ceramic package DCC12A Features Low-loss IF filter for GSM EDGE base station Usable bandwidth 400 kHz Very low group delay ripple Temperature stable Ceramic SMD package 1 2 3 4 5 2,3 1,7 ■ ■ ■ ■ ■ 7,62 1,0 bottom view 10 9 8 7 6 3,81 1,6 Terminals side view top view 6,5 ■ Gold plated 13,3 Dimensions in mm, approx. weight 0,4 g Pin configuration 10 1 5 6 3, 8 2, 4, 7, 9 Input Input ground Output Output ground Ground Case ground Type Ordering code B3850 B39121-B3850-H510 Marking and Package according to C61157-A7-A94 Electrostatic Sensitive Device (ESD) Maximum ratings Operable temperature range Storage temperature range DC voltage Source power T Tstg VDC Ps –40 / +85 –40 / +85 1,2 10 2 ˚C ˚C V dBm Jul 15, 2002 Packing according to F61074-V8131-Z000 SAW Components B3850 Low-Loss Filter 125,00 MHz Data Sheet Characteristics Operating temperature range: Terminating source impedance: Terminating load impedance: T = -10 .. 85 ˚C ZS = 50 Ω and matching network ZL = 50 Ω and matching network min. typ. max. Nominal frequency fN — 125,0 — Minimum insertion attenuation αmin — 6,2 B1dB B3dB 400 — 7,0 MHz dB Pass bandwidth αrel ≤ 1,0 dB αrel ≤ 3,0 dB Amplitude ripple (peak to adjacent valley) fN ± 200 kHz 560 840 — — kHz kHz — dB — 0,1 — 0,6 1,0 dB 1,1 1,7 µs ∆α Amplitude variation (p-p) fN ± 200 kHz τ Absolute group delay @ fN 0,7 ∆τ Group delay ripple (p-p) fN ± 200 kHz Relative attenuation (relative to αmin) fN ± 0,4 MHz ... fN ± 0,6 MHz fN ± 0,6 MHz ... fN ± 1,2 MHz fN ± 1,2 MHz ... fN ± 1,8 MHz fN ± 1,8 MHz ... fN ± 3,4 MHz fN ± 3,4 MHz ... fN ± 6,5 MHz fN ± 6,5 MHz ... fN ± 9,5 MHz fN ± 9,5 MHz ... fN ± 17,0 MHz 10,0 MHz ... fN − 17,0 MHz fN + 17,0 MHz ... 450,0 MHz1) — 70 120 ns 0 8 20 25 34 40 43 55 55 2 10 30 40 50 50 60 60 60 — — — — — — — — — dB dB dB dB dB dB dB dB dB αrel VSWR (Input and output in pass band) — 3 Jul 15, 2002 2,0 2,3 SAW Components B3850 Low-Loss Filter 125,00 MHz Data Sheet min. Temperature coefficient of frequency Turnover temperature 2) typ. max. TCf — – 0,036 — ppm/K2 T0 — 50 — ˚C 1) Narrowband responses (typ. 40 dB) at 202 MHz, 228 MHz, 250 MHz, and at 375 MHz 2) Temperature dependance of fc: fc(TA) = fc(T0)(1 + TCf(TA – T0)2) Matching network to 50 Ω (Element values depend upon PCB layout) Lp1 = 33 nH Ls3 = 56 nH Ls2 = 68 nH Lp4 = 27 nH 4 Jul 15, 2002 SAW Components B3850 Low-Loss Filter 125,00 MHz Data Sheet Normalized frequency response Normalized frequency response (pass band) 5 Jul 15, 2002 SAW Components B3850 Low-Loss Filter 125,00 MHz Data Sheet 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. 6 Jul 15, 2002