B39451-B3558-U310

B3558 EPCOS | Alldatasheet

Document overview

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Technical content

2 May 09, 2001

449,10 MHzLow-loss Filter Data Sheet

Features

■ RF low-loss filter for remote control receivers ■ Package for Surface M ounted Technology (SMT ) ■ Balanced and unbalanced operation possible Terminals ■ Ni, gold plated Pin configuration

1 Input Ground

2 Input

5 Output

6 Output Ground

4,8 Case - Ground 3,7 to be grounded ElectrostacticSensitiveD evice (ESD ) Type Ordering code Marking and package according to Packing according to B3558 B39451-B3558-U310 C61157-A7-A56 F61074-V8070-Z000 Maximum ratings Operable temperature range TA –30/+85 ˚C Storage temperature rangeTstg –45/+90 ˚C DC voltage VDC 0V Source power PS 10 dBm source impedance 50 Ω typ. dimensions in mm, approx. weight 0,1 g Ceramic package QCC8C

3 May 09, 2001

449,10 MHzLow-loss Filter Data Sheet Characteristics Reference temperature: TA = 25 ˚C Terminating source impedance: ZS = 50Ω and matching network Terminating load impedance: ZL = 50Ω and matching network 1)Temperature dependence offC :fC (TA) =fC (T0) (1 +TC f(TA –T0)2) 2) Impedance for passband matching bases on an ideal, perfect matching of the SAW filter to source- and to load impedance (here 50 Ohm). After the SAW filter is removed and input imped- ance into the input matching / output matching network is calculated. The conjugate complex value of these characteristic impedances are the input and output imped- ances for flat passband. For more details, we refer to EPCOS application note #4. min. typ. max. Center frequency fC — 449,14 — MHz (center frequency between 3 dB points) Minimum insertion attenuation α min 449,00 ... 449,28 MHz — 2,2 3,2 dB Pass band (relative toα min) 448,965 ... 449,315 MHz — 0,8 3,0 dB 448,930 ... 449,350 MHz — 1,5 6,0 dB Relative attenuation(relative toα min) α rel 10,00 ... 428,00 MHz 45 50 — dB 428,00 ... 439,00 MHz 40 45 — dB 439,00 ... 448,10 MHz 15 25 — dB 450,10 ... 459,00 MHz 15 25 — dB 459,00 ... 550,00 MHz 40 45 — dB 550,00 ... 1000,00 MHz 45 50 — dB Impedance for pass band matching Input: ZIN = R IN ||C IN — 210 || 2,70 — Ω || pF Output:ZOUT = R OUT ||C OUT — 210 || 2,70 — Ω || pF Temperature coefficient of frequency 1) TC f — –0,03 — ppm/K 2 Frequency inversion point T0 20 — 40 °C

4 May 09, 2001

449,10 MHzLow-loss Filter Data Sheet Characteristics Reference temperature: TA = –30 ... 85 ˚C Terminating source impedance: ZS = 50Ω and matching network Terminating load impedance: ZL = 50Ω and matching network 2) Impedance for passband matching bases on an ideal, perfect matching of the SAW filter to source- and to load impedance (here 50 Ohm). After the SAW filter is removed and input imped- ance into the input matching / output matching network is calculated. The conjugate complex value of these characteristic impedances are the input and output imped- ances for flat passband. For more details, we refer to EPCOS application note #4. min. typ. max. Center frequency fC — 449,10 — MHz (center frequency between 3 dB points) Minimum insertion attenuation α min 449,00 ... 449,28 MHz — 2,2 3,4 dB Pass band (relative toα min) 448,965 ... 449,235 MHz — 0,5 3,0 dB 448,930 ... 449,270 MHz — 1,5 6,0 dB Relative attenuation(relative toα min) α rel 10,00 ... 428,00 MHz 45 50 — dB 428,00 ... 439,00 MHz 40 45 — dB 439,00 ... 448,02 MHz 15 25 — dB 450,10 ... 459,00 MHz 15 25 — dB 459,00 ... 550,00 MHz 40 45 — dB 550,00 ... 1000,00 MHz 45 50 — dB Impedance for pass band matching Input: ZIN = R IN ||C IN — 210 || 2,70 — Ω || pF Output:ZOUT = R OUT ||C OUT — 210 || 2,70 — Ω || pF

5 May 09, 2001

449,10 MHzLow-loss Filter Data Sheet Matching network to 50Ω (element values depend on pcb layout and equivalent circuit) C p1 = 1,8 pF Ls2 = 33 nH Ls3 = 33 nH C p4 = 1,8 pF Minimising the crosstalk For a good ultimate rejection a low crosstalk is necessary. Low crosstalk can be realised with a good RF layout. The major crosstalk mechanism is caused by the “ground-loop” problem. Grounding loops are created if input-and output transducer GND are connected on the top-side of the PCB and fed to the system grounding plane by a common via hole. To avoid the common ground path, the ground pin of the input- and output transducer are fed to the system ground plane (bottom PCB plane) by their own via hole. The transducers’ grounding pins should be isolated from the upper grounding plane. A common GND inductivity of 0.5nH degrades the ultimate rejection (crosstalk) by 20dB. The optimised PCB layout, including matching network for transformation to 50 Ohm, is shown here. In this PCB layout the grounding loops are minimised to realise good ultimate rejection. Optimised PCB layout for SAW filters in QCC8C package, pinning 2,5 (top side, scale 1:1) The bottom side is a copper plane (system ground area). The input and output grounding pins are isolated and connected to the common ground by separated via holes. For good contact of the upper grounding area with the lower side it is necessary to place enough via holes.

6 May 09, 2001

449,10 MHzLow-loss Filter Data Sheet Normalized frequency response Normalized frequency response(wideband)

7 May 09, 2001

449,10 MHzLow-loss Filter Data Sheet Published by EPCOS AG Surface Acoustic Wave Components Division, SAW CE AE PD P.O. Box 80 17 09, D-81617 München  EPCOS AG 2001. All Rights Reserved. As far as patents or other rights of third parties are concerned, liability is only assumed for compo- nents 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.