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参数资料
| 型号： | B39311B3784Z810 |
| 厂商： | EPCOS Inc |
| 文件页数： | 6/10页 |
| 文件大小： | 0K |
| 描述： | FILTER SAW 314.45MHZ SMD |
| 标准包装： | 3,000 |
| 频率： | 314.45MHz 中心 |
| 带宽： | 1.1MHz |
| 滤波器类型： | 带通 |
| 插入损耗： | 1.9dB |
| 应用： | 远程控制 |
| 封装/外壳： | 8-SMD，无引线 |
| 安装类型： | 表面贴装 |
| 包装： | 带卷 (TR) |
| 高度（最大）： | 0.059"（1.50mm） |
| 尺寸/尺寸： | 0.150" L x 0.150" W（3.80mm x 3.80mm） |
SAW Components
SAW RF filter
B3784
314.45 MHz
Data sheet
ESD protection of SAW filters
SAW filters are E lectro S tatic D ischarge 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.
Ls3
Ls3
Lp2
to output
matching
Dp1
Lp2
to output
matching
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.
Ls2
Cs1
Lp1
Fig. 3 shunt L – series L matching
to output
matching
Lp2
Fig. 4 series C – shunt L matching
to output
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.
6
December 17, 2012
相关PDF资料 |
PDF描述 |
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| B39311R771U310 | RESONATOR SAW 314.875/315.125MHZ |
| B39311R854H210 | RESONATOR SAW CER 314.5MHZ SMD |
| B39311R966H110 | R 966 RESONATOR |
| B39311R994H110 | R 994 RESONATOR(314.9MHZ) |
| B39321B3719H110 | FILTER SAW 315MHZ SMD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| B39311B3917U410 | 制造商:TDK EPCOS 功能描述:FILTER SAW SMD RF 313.6MHZ RKE |
| B39311B3924H110 | 功能描述:CERAMIC WIDEBAND FRONTENDFILTER 制造商:epcos (tdk) 系列:* 零件状态:有效 标准包装:9,000 |
| B39311B3938H110 | 制造商:TDK EPCOS 功能描述:FILTER SAW SMD RF 313.85MHZ RKE |
| B39311B3946H110 | 功能描述:DCC6E Q 3.0X3.0 FILTER 制造商:epcos (tdk) 系列:* 零件状态:有效 标准包装:9,000 |
| B39311B5251H810 | 制造商:TDK Epcos 功能描述:SAW FILTER SMD - Tape and Reel |
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