Datasheet > 过滤器 > SAW 滤波器> B39431B3780Z810

B39431B3780Z810

更新时间： 2024-02-28 00:06:36

品牌	Logo	应用领域
爱普科斯 - EPCOS		SAW滤波器过滤器
页数	文件大小	规格书
9页	83K
描述
SAW filter Short range devices

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技术参数
数据手册

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B39431B3780Z810 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Transferred	Reach Compliance Code：	compliant
风险等级：	5.01	其他特性：	INSERTION LOSS INCLUDING MATCHING ELEMENTS
中心频率或截止频率 (fo/fc)：	433.92 MHz	滤波器类型：	SAW FILTER
高度：	1.5 mm	输入阻抗：	330 OHM//1.9 pF
最大插入损耗：	2.8 dB	JESD-609代码：	e4
长度：	3.8 mm	安装类型：	SURFACE MOUNT
功能数量：	1	端子数量：	8
最高工作温度：	105 °C	最低工作温度：	-40 °C
输出阻抗：	330 OHM//1.9 pF Ω	包装材料：	CERAMIC
物理尺寸：	L3.8XB3.8XH1.5 (mm)/L0.15XB0.15XH0.059 (inch)	子类别：	SAW Filters
端子面层：	Nickel/Gold (Ni/Au)	宽度：	3.8 mm
Base Number Matches：	1

B39431B3780Z810 数据手册

SAW Components

SAW filter

B3780

433.92 MHz

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.

Ls3

to output

matching

to output

matching

Dp1

Lp2

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.

Cs1

Ls2

to output

matching

to output

matching

Lp1

Lp2

Fig. 3 shunt L – series L matching

Fig. 4 series C – shunt 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.

July 24, 2008

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