SAW Components
Data Sheet B4812
SAW Components Low-Loss Filter Data Sheet
B4812 246,01 MHz
Ceramic package QCC10B
Features
q q q q
Low-loss IF filter for mobile telephone Channel selection in GSM systems Hermetically sealed ceramic SMD package Balanced and unbalanced operation possible
Terminals
q Gold-plated Ni
Dimensions in mm, approx. weight 0,23 g Pin configuration 4 5 9 10 1, 3, 6, 8 2, 7 Input Input ground or balanced input Output Output ground or balanced output Case – ground Ground
Type B4812
Ordering code B39251-B4812-Z710
Marking and Package according to C61157-A7-A49
Packing according to F61074-V8127-Z000
Electrostatic Sensitive Device (ESD)
Maximum ratings Operable temperature range Storage temperature range DC voltage Source power
T Tstg VDC Ps
– 25/+ 85 – 25/+ 85 0 10
˚C ˚C V dBm
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SAW Components Low-Loss Filter Data Sheet
Characteristics Reference temperature: Terminating source impedance: Terminating load impedance:
B4812 246,01 MHz
T = 25 ˚C ZS = 700 Ohm || -2,6 pF ZL = 700 Ohm || -2,6 pF
min. typ. 246,01 3,2 max. — 5,0 MHz dB
Nominal frequency Minimum insertion attenuation (including loss in matching coils) Amplitude ripple (p-p) fN - 67,5 kHz ... fN + 67,5 kHz fN - 80,0 kHz ... fN + 80,0 kHz Group delay ripple (p-p) fN - 50,0 kHz ... fN + 50,0 kHz fN - 80,0 kHz ... fN + 80,0 kHz Relative attenuation (relative to αmin) fN - 25,00 MHz ... fN - 3,00 MHz fN - 3,00 MHz ... fN - 1,60 MHz fN - 1,60 MHz ... fN - 0,60 MHz fN - 0,60 MHz ... fN - 0,40 MHz fN - 0,40 MHz ... fN - 0,20 MHz
fN
αmin ∆α
— 2,0
— — ∆τ — — αrel 50 48 38 28 8 8 28 38 48 50 — —
0,6 0,7 0,5 1,2 60 60 50 40 14 14 40 50 60 60 700 || 2,6 700 || 2,6 – 0,036 25
2,0 3,0 1,5 3,0 — — — — — — — — — — — — — —
dB dB µs µs dB dB dB dB dB dB dB dB dB dB Ω || pF Ω || pF ppm/K2 ˚C
fN + 0,20 MHz fN + 0,40 MHz fN + 0,60 MHz fN + 1,60 MHz fN + 3,00 MHz
Impedance at fN
... ... ... ... ...
fN + 0,40 MHz fN + 0,60 MHz fN + 1,60 MHz fN + 3,00 MHz fN + 25,00 MHz
Input: ZIN = RIN || CIN Output: ZOUT = ROUT || COUT Temperature coefficient of frequency 1) Frequency inversion point
1) Temperature
TCf T0
— —
dependence of fc:
fc(T) = fc(T0)(1 + TCf(T – T0)2)
Test matching network to 50 Ω (element values depend on PCB layout): Cp1 Ls2 Ls3 Cp4 = = = = 1,8 56 56 1,8 pF nH nH pF
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Jul 11, 2003
SAW Components Low-Loss Filter Data Sheet
Transfer function:
B4812 246,01 MHz
Transfer function (pass band):
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Jul 11, 2003
SAW Components Low-Loss Filter Data Sheet
B4812 246,01 MHz
Published by EPCOS AG Surface Acoustic Wave Components Division, SAW MC WT P.O. Box 80 17 09, 81617 Munich, GERMANY © EPCOS AG 2003. 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.
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