B39871B3762Z810 EPCOS Inc, B39871B3762Z810 Datasheet - Page 8

• Manufacturer Part Number: B39871B3762Z810
• Description: FILTER SAW 868.3MHZ REMOTE SMD
• Manufacturer: EPCOS Inc
• Series: B3762r

Specifications of B39871B3762Z810

• Frequency: 868.3MHz Center
• Package / Case: 0.150" L x 0.150" W x 0.059" H (3.80mm x 3.80mm x 1.50mm)
• Bandwidth: 200kHz
• Insertion Loss: 3.1dB
• Filter Type: Bandpass
• Applications: Remote Control
• Mounting Type: Surface Mount
• Product: RF SAW Filters
• Impedance: 50 Ohms
• Operating Temperature Range: - 45 C to + 120 C
• Voltage Rating: 6 Volts
• Termination Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 495-1673-2; B39871B3762Z810W1

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 two figures show recommended “ESD matching” topologies.
Depending on the input impedance of the SAW filter and the source impedance, the needed
component values have to be determined from case to case.
Fig. 1 MLC varistor plus ESD matching
In cases where minor ESD occur, following simplified “ESD matching” topologies can be used
alternatively.
Fig. 3 shunt L – series L matching
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
“data sheets” and then “Applications” under category “Further information”.
Please read cautions and warnings and
important notes at the end of this document.
SAW Components
SAW filter
Lp1
Ls2
Lp2
Ls3
to output
matching
to output
matching
8
Fig. 2 Suppressor diode plus ESD matching
Fig. 4 series C – shunt L matching
August 01, 2007
Dp1
Cs1
Lp2
Ls3
Lp2
868.30 MHz
B3762
to output
matching
to output
matching