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参数资料
| 型号： | B39451B3737H110 |
| 厂商： | EPCOS Inc |
| 文件页数： | 6/11页 |
| 文件大小： | 0K |
| 描述： | FILTER SAW 447.725MHZ SMD |
| 标准包装： | 9,000 |
| 频率： | 447.725MHz 中心 |
| 带宽： | 290kHz |
| 滤波器类型： | 带通 |
| 插入损耗： | 2.2dB |
| 应用： | 远程控制 |
| 封装/外壳： | 6-SMD，无引线 |
| 安装类型： | 表面贴装 |
| 包装： | 带卷 (TR) |
| 高度（最大）： | 0.039"（1.00mm） |
| 尺寸/尺寸： | 0.118" L x 0.118" W（3.00mm x 3.00mm） |
SAW Components
SAW filter
B3737
447.725 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
April 23, 2013
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相关代理商/技术参数 |
参数描述 |
|---|---|
| B39451B3767Z810 | 功能描述:信号调节 447.725 MHz SMD RoHS:否 制造商:EPCOS 产品:Duplexers 频率:782 MHz, 751 MHz 频率范围: 电压额定值: 带宽: 阻抗:50 Ohms 端接类型:SMD/SMT 封装 / 箱体:2.5 mm x 2 mm 工作温度范围:- 30 C to + 85 C 封装:Reel |
| B39451-B3767-Z810 | 制造商:EPCOS 制造商全称:EPCOS 功能描述:SAW Components Low-loss Filter 447,725 MHz |
| B39451B3860H310 | 功能描述:信号调节 IF 445.25 MHZ RoHS:否 制造商:EPCOS 产品:Duplexers 频率:782 MHz, 751 MHz 频率范围: 电压额定值: 带宽: 阻抗:50 Ohms 端接类型:SMD/SMT 封装 / 箱体:2.5 mm x 2 mm 工作温度范围:- 30 C to + 85 C 封装:Reel |
| B39451B3907U410 | 功能描述:信号调节 RoHS:否 制造商:EPCOS 产品:Duplexers 频率:782 MHz, 751 MHz 频率范围: 电压额定值: 带宽: 阻抗:50 Ohms 端接类型:SMD/SMT 封装 / 箱体:2.5 mm x 2 mm 工作温度范围:- 30 C to + 85 C 封装:Reel |
| B39451B4052U410 | 功能描述:信号调节 LOW LOSS 447.0 MHZ RoHS:否 制造商:EPCOS 产品:Duplexers 频率:782 MHz, 751 MHz 频率范围: 电压额定值: 带宽: 阻抗:50 Ohms 端接类型:SMD/SMT 封装 / 箱体:2.5 mm x 2 mm 工作温度范围:- 30 C to + 85 C 封装:Reel |
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