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B39162B3400U410

P1-P3P4-P6P7-P9P10-P10
5 May 22, 2014
B3400
1575.42 MHz
SAW Components
SAW RF filter
Data sheet
Please read
cautions and warnings and
important notes
at the end of this document.
Transfer function
Transfer function (wideband)
6 May 22, 2014
B3400
1575.42 MHz
Please read
cautions and warnings and
important notes
at the end of this document.
SAW Components
SAW RF filter
Data sheet
ESD protection of SAW filters
SAW filters are Electro Static Discharge sensitive devices. To reduce the probability of damages
caused by ESD, special matching topologies have to be applied.
In general, “ESD matching” has to be ensured at that filter port, where electrostatic discharge is
expected.
Electrostatic discharges predominantly appear at the antenna input of RF receivers. Therefore
only the input matching of the SAW filter has to be designed to short circuit or to block the ESD
pulse.
Below three figures show recommended “ESD matching” topologies.
For wideband filters the high-pass ESD matching structure needs to be at least of 3
rd
order to
ensure a proper matching for any impedance value of antenna and SAW filter input. The required
component values have to be determined from case to case.
Fig. 1 MLC varistor plus ESD matching Fig. 2 Suppressor diode plus ESD matching
In cases where minor ESD occur, following simplified “ESD matching” topologies can be used
alternatively.
Fig. 3 3
rd
order high-pass structure for basic ESD protection
In all three figures the shunt inductor Lp2 could be replaced by a shorted microstrip with proper
length and width. If this configuration is possible depends on the operating frequency and
available pcb space.
Effectiveness of the applied ESD protection has to be checked according to relevant industry
standards or customer specific requirements
For further information, please refer to EPCOS Application report:
“ESD protection for SAW filters”.
This report can be found under www.epcos.com/rke.Click on “Applications Notes”.
MLC1
Cs1
Lp2
Cs3
to output
matching
Dp1
Lp2
Cs3
Cs1
to output
matching
Lp2
Cs3
Cs1
to output
matching
7 May 22, 2014
B3400
1575.42 MHz
SAW Components
SAW RF filter
Data sheet
Please read
cautions and warnings and
important notes
at the end of this document.
References
Type B3400
Ordering code B39162B3400U410
Marking and package C61157-A7-A67
Packaging F61074-V8228-Z000
Date codes L_1126
S-parameters
B3400_NB.s2p, B3400_WB.s2p
see file header for port/pin assignment table
Soldering profile S_6001
RoHS compatible RoHS-compatible means that products are compatible with the
requirements according to Art. 4 (substance restrictions) of Di-
rective 2011/65/EU of the European Parliament and of the
Council of June 8
th
, 2011, on the restriction of the use of certain
hazardous substances in electrical and electronic equipment
("Directive") with due regard to the application of exemptions as
per Annex III of the Directive in certain cases.
Matching coils See Inductor pdf-catalog
http://
www
.tdk.co.jp/tefe02/coil.htm#aname1
and Data Library for circuit simulation
http://www.tdk.co.jp/etvcl/index.htm
for a large variety of matching coils.
For further information please contact your local EPCOS sales office or visit our webpage at
w
ww.epcos.com .
Published by EPCOS AG
Systems, Acoustics, Waves Business Group
P.O. Box 80 17 09, 81617 Munich, GERMANY
EPCOS AG 2014. This brochure replaces the previous edition.
For questions on technology, prices and delivery please contact the Sales Offices of EPCOS AG or
t
he international Representatives.
Due to technical requirements components may contain dangerous substances. For information on
t
he type in question please also contact one of our Sales Offices.
P1-P3P4-P6P7-P9P10-P10

B39162B3400U410

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FILTER SAW 6SMD
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