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| 型号： | ATREB232ED-EK |
| 厂商： | Atmel |
| 文件页数： | 14/40页 |
| 文件大小： | 0K |
| 描述： | AT86RF232 EVAL KIT |
| 产品培训模块： | AT86RF232 Low Power 2.4 GHz Wireless Transceiver |
| 标准包装： | 1 |
| 类型： | 收发器，微控制器 |
| 频率： | 2.4GHz |
| 适用于相关产品： | AT86RF232 |
| 已供物品： | 4 块板，电池，电缆，文档 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页当前第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页
Figure 5-5. Board layout – transceiver GND.
7
6
3
32
31
30
12
27
16
18
21
The soldering technology used allows the placement of small vias (0.15mm drill)
within the ground paddle underneath the chip. During reflow soldering, the vias get
filled with solder, having a positive effect on the connection cross section. The small
drill size keeps solder losses within an acceptable limit. During the soldering process
vias should be open on the bottom side to allow enclosed air to expand.
5.5 PCB detail 5 – digital GND routing and shielding
With the Atmel AT86RF232, consider pins 7, 12, 16, 18, and 21 as digital ground
pins.
Digital ground pins are not directly connected to the paddle. Digital ground pins may
carry digital noise from I/O pad cells or other digital processing units within the chip.
In case of a direct paddle connection, impedances of the paddle ground vias could
cause a small voltage drop for this noise and may result in an increased noise level
transferred to the analog domain.
There is a number of pro’s and con’s when it comes to the shielding topic. The major
con’s are:
? Cost of the shield
? Manufacturing effort
? Inaccessibility for test and repair
The number of pro’s might be longer but the cost argument is often very strong.
However, the reasons to add the shield for this reference design are:
? Shield is required for a certification in Japan
? Shield is recommended for FCC certification in North America
? Increased performance
14
Atmel AVR2092
8427A-AVR-10/11
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参数描述 |
|---|---|
| ATREB233SMAD-EK | 功能描述:射频开发工具 AT86RF233 evaluation kit RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V |
| ATREB233-XPRO | 功能描述:XPLAINED PRO EXT REB233 制造商:atmel 系列:Xplained Pro 零件状态:有效 类型:收发器 频率:2.4GHz 配套使用产品/相关产品:AT86RF233 所含物品:板 标准包装:1 |
| ATRF231USB-RD | 制造商:Atmel Corporation 功能描述:AT86RF231 AND CORTEXM3 USB STICK - Boxed Product (Development Kits) 制造商:Atmel Corporation 功能描述:AT86RF231 and CortexM3 USB stick |
| ATRF4CE-EK | 功能描述:开发板和工具包 - 无线 RF4CE evaluation kit RoHS:否 制造商:Arduino 产品:Evaluation Boards 工具用于评估:AT32UC3L 核心:AVR32 频率: 接口类型:USB 工作电源电压:5 V |
| ATRJ8-FSSR | 制造商:Amphenol Sine Systems 功能描述:RJ PLUG, FIELD SLD STRN RELIEF |
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