- 您现在的位置：买卖IC网 > Datasheet目录670 > B39311B3784Z810 (EPCOS Inc)FILTER SAW 314.45MHZ SMD Datasheet资料下载
参数资料
| 型号： | B39311B3784Z810 |
| 厂商： | EPCOS Inc |
| 文件页数： | 5/10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
Matching network to 50 ? (element values depend on pcb layout and equivalent circuit)
L p1 = 27 nH
L s2 = 56 nH
L s3 = 56 nH
L p4 = 27 nH
Minimising the crosstalk
For a good ultimate rejection a low crosstalk is necessary. Low crosstalk can be realised with a good
RF layout. The major crosstalk mechanism is caused by the “ground-loop” problem.
Grounding loops are created if input-and output transducer GND are connected on the top-side of
the PCB and fed to the system grounding plane by a common via hole. To avoid the common
ground path, the ground pin of the input- and output transducer are fed to the system ground plane
(bottom PCB plane) by their own via hole. The transducers’ grounding pins should be isolated from
the upper grounding plane.
A common GND inductivity of 0.5nH degrades the ultimate rejection (crosstalk) by 20dB.
The optimised PCB layout, including matching network for transformation to 50 Ohm, is shown
here. In this PCB layout the grounding loops are minimised to realise good ultimate rejection
Optimised PCB layout for SAW filters in QCC8B package, pinning 2,5 (top side, scale 1:1)
The bottom side is a copper plane (system ground area). The input and output grounding pins are
isolated and connected to the common ground by separated via holes.
For good contact of the upper grounding area with the lower side it is necessary to place enough
via holes.
Please read cautions and warnings and
important notes at the end of this document.
5
December 17, 2012
相关PDF资料 |
PDF描述 |
|---|---|
| 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 |
发布紧急采购，3分钟左右您将得到回复。