|
|
PDF B3570 Data sheet ( Hoja de datos )
| Número de pieza | B3570 | |
| Descripción | SAW Components Low-loss Filter | |
| Fabricantes | EPCOS | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de B3570 (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
|
No Preview Available !
SAW Components
Data Sheet B3570
1 page  
SAW Components
B3570
Low-loss Filter
868,30 MHz
Data Sheet
Matching network to 50 Ω (element values depend on pcb layout and equivalent circuit)
Cp1 = 3,3 pF
Ls2 = 12 nH
Ls3 = 12 nH
Cp4 = 3,3 pF
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 QCC8C package, pinning 1,5 (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.
5 May 09, 2001
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet B3570.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| B3570 | SAW Components Low-loss Filter | EPCOS |
| B3571 | SAW Components Low-loss Filter | EPCOS |
| B3572 | SAW Components Low-loss Filter | EPCOS |
| B3573 | SAW Components Low-loss Filter | EPCOS |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |