原标题：Silas Si4455低功耗小于1GHz EZRADIO收发器开发方案

　　Silas公司的Si4455是容易使用的低功耗小于1GHz的EZRADIO收发器,频率范围283–960 MHz,输出功率+13dBm,接收灵敏度-116dBm,采用FSK和OOK调制,工作电压1.8 到3.6 V,具有自动频率控制(AFC)和自动增益控制(AGC),主要用于遥控,家庭安全和告警,车库和大门开启,无线钥匙,家庭自动化,工业控制,传感器网络,健康监视器和遥感勘测.本文介绍了Si4455主要特性,功能框图,典型应用电路,以及EZRadio Si4455无线开发套板主要特性和电路图以及4455-PCE10D434M RF Pico板材料清单.

　　Silicon Laboratories’Si4455 is an easy-to-use, low current, sub-GHz EZRadio® transceiver. Covering all major bands, it combines plug-and-play simplicity with the flexibility needed to handle a wide variety of applications. The compact 3x3 mm package size combined with a low external BOM count makes the Si4455 both space efficient and cost effective. The +13 dBm output power and excellent sensitivity of –116 dBm allows for a longer operating range, while the low current consumption of 18 mA TX (at 10 dBm), 10 mA RX, and 50 nA standby, provides for superior battery life. By fully integrating all components from the antenna to the GPIO or SPI interface to the MCU, the Si4455 makes realizing this performance in an application easy. Design simplicity is further exemplified in the Wireless Development Suite (WDS) user interface module. This configuration module provides simplified programming options for a broad range of applications in an easy to use format that results in both a faster and lower risk development. The Si4455 is capable of supporting major worldwide regulatory standards such as FCC, ETSI, ARIB and China regulatory standards.

　　Si4455主要特性:

　　 frequency range = 283–960 MHz

　　 Receive sensitivity = –116 dBm

　　 Modulation

　　(G)FSK

　　OOK

　　 Max output power = +13 dBm

　　 Low active power consumption

　　10 mA RX

　　18 mA TX @ +10 dBm

　　 Low standby current = 50 nA

　　 Max data rate = 500 kbps

　　 Power supply = 1.8 to 3.6 V

　　 TX and RX 64 byte FIFOs

　　 Automatic frequency control (AFC)

　　 Automatic gain control (AGC)

　　 Integrated battery voltage sensor

　　 Packet handling including preamble, sync word detection, and CRC

　　 Low BOM

　　 20-Pin 3x3 mm QFN package

　　Si4455应用:

　　 Remote control

　　 Home security and alarm

　　 Telemetry

　　 Garage and gate openers

　　 Remote keyless entry

　　 Home automation

　　 Industrial control

　　 Sensor networks

　　 Health monitors

　　图1. Si4455功能框图

　　图2. Si4455应用电路图

　　EZRadio Si4455无线开发板

　　EZRadio® Si4455 Wireless Development Kit 4455-434-PDK, 4455-868-PDK or 4455-915-PDK

　　This user’s guide describes the development kits of the Silicon Labs’ EZRadio® product family. Each kit contains two RF nodes based on the Wireless Motherboard (WMB) to support evaluation and development of sub-GHz RF links with the different EZRadio ICs. Table 1 lists the boards of the kits that use the latest C2A revision of the EZRadio ICs. Table 2 lists the boards of the obsolete kits that use the previous B1B revision of the EZRadio ICs.

　　图3. 8位无线开发主板外形图

　　Silicon Labs’Wireless Development Kit contains everything you need to familiarize yourself with and evaluate the Si4455 transceiver and LCD baseboard. The kit has three versions: one for the 434 MHz band, the 868 MHz band and the 915 MHz band.

　　8位无线开发主板包括:

　　(2) Si4455 RF Pico Boards

　　(2) LCD MSC-WMB930 Motherboards

　　(2) C8051F930 Pico Boards

　　(2) Whip Antennas

　　(4) AA Battery

　　(1) EZRadio Kit User’s Guide

　　EZRadio开发板分类表:

　　4455CLED-868-PER Pico Board Design Files