IF Filters for Narrowband Cellular Phones Series/Type: B4874 The following products presented in this data sheet are being withdrawn. Ordering Code B39860B4874Z710 Substitute Product Date of Withdrawal 2003-03-07 Deadline Last Orders 2003-07-31 Last Shipments 2003-09-30 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 Data Sheet B4874 SAW Components B4874 85,38 MHz Low Loss Filter for Mobile Communication Data Sheet Ceramic package QCC10B Features ■ ■ ■ ■ ■ ■ ■ Low-loss IF filter for mobile telephone Channel selection in AMPS/D-AMPS systems Filter surface passivated High stopband attenuation Low insertion loss Balanced or unbalanced operation possible Package for Surface Mounted Technology (SMT) Terminals ■ Ni, gold plated Dimensions in mm, approx. weight 0,23 g Pin configuration 10 5 9 4 1,3,6,8 2,7 Type B4874 Input Output Balanced input or input ground Balanced output or output ground Case ground Not connected Ordering code B39860-B4874-Z710 Marking and Package Packing according to according to C61157-A7-A49 F61064-V8035-Z000 Electrostatic Sensitive Device (ESD) Maximum ratings Operable temperature range Storage temperature range DC voltage Source power T Tstg VDC Ps – 30/+ 85 – 40/+ 85 13 10 2 ˚C ˚C V dBm May 08, 2001 SAW Components B4874 85,38 MHz Low Loss Filter for Mobile Communication Data Sheet Characteristics T = -30˚C ... 85˚C ZS = 1000 Ω || 2600 nH ZL = 1000 Ω || 2600 nH Operating temperature range: Terminating source impedance: Terminating load impedance: min. fN Nominal frequency 3 dB Bandwidth — +-14 Minimum insertion attenuation (including losses in the matching network) αmin Amplitude ripple (p-p) fN – 12,0 kHz ... fN + ∆α 12,0 kHz Group delay ripple (p-p) fN – 12,0 kHz ... fN + 12,0 kHz typ. max. 85,38 — MHz — — kHz — 3,0 4,5 dB — 0,3 1,5 dB — 3,0 10,0 µs — 25 45 40 0,5 32 57 57 3,0 — — — dB dB dB dB — — Ω || pF — 1000 || 1,4 1000 || 1,4 — Ω || pF ∆τ Relative attenuation (relative to αmin) fN ± 14,0 kHz fN ± 60,0 kHz ... fN ± 120,0 kHz fN ± 120,0 kHz fN ± 120,0 kHz ... fN ± 2,5 MHz αrel Impedance within the passband Input: ZIN = RIN || CIN Output: ZOUT = ROUT || COUT Temperature coefficient of frequency 1) TCf — – 0,036 — ppm/K2 Turnover temperature T0 — 25 — ˚C 1) Temperature dependance of fc: fc(T) = fc(T0)(1 + TCf(T – T0)2) 3 May 08, 2001 SAW Components B4874 85,38 MHz Low Loss Filter for Mobile Communication Data Sheet Test matching networks to 50 Ω (element values depend on pcb layout) a) Unbalanced - unbalanced matching network Input: Pin 10 Output: Pin 5 Ls1 = 390 nH Cp2 = 4,7 pF Cp3 = 4,7 pF Ls4 = 390 nH b) Balanced - balanced matching network Input: Pins 10 and 9 Output: Pins 5 and 4 Cs1 = 8,2 pF Cs2 = 8,2 pF Lp1 = 680 nH Lp2 = 680 nH Cs3 = 10 pF Cs4 = 8,2 pF Note : The balanced - balanced network is realized using M/A-COM 1:4 baluns TP-103. The insertion attenuation of each balun is 0,4 dB at fN. The loss of the baluns is not included in the specified filter insertion attenuation. S-Parameters of the M/A-COM 1:4 baluns TP-103 are available on request. The level of ultimate suppression may be limited by electromagnetic feedthrough depending on the layout of the pcb and the arrangement of the matching components. The above mentioned characteristics can be realized either in balanced or in unbalanced mode of operation. For more details see our application note PCB Layout for Highly Selective IF Filters. 4 May 08, 2001 SAW Components B4874 85,38 MHz Low Loss Filter for Mobile Communication Data Sheet Normalized transfer function (passband, measured single ended - single ended) Normalized transfer function (wideband, measured single ended - single ended) 5 May 08, 2001 SAW Components B4874 85,38 MHz Low Loss Filter for Mobile Communication Data Sheet Published by EPCOS AG Surface Acoustic Wave Components Division, OFW E MF P.O. Box 80 17 09, D-81617 München EPCOS AG 1999. All Rights Reserved. As far as patents or other rights of third parties are concerned, liability is only assumed for components per se, not for applications, processes and circuits implemented within components or assemblies. The information describes the type of component and shall not be considered as assured characteristics. Terms of delivery and rights to change design reserved. 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 May 08, 2001