基于RF6525的ZigBee前端设计解决方案

基于RF6525的ZigBee前端设计解决方案

RF6525是RFMD公司的2.4GHz 到2.5GHz频段的ZigBee前端模块(FEM),在发送(TX)通路集成功率放大器和谐波滤波器,接收通路(RX)集成了带旁路模式的LNA.此外,在TX和RX还集成了多种开关,并提供平衡输入和输出信号.TX输出功率22dBm,TX增益28dB,RX增益11.5dB,噪音为2.5dB. RF6525可用作基于ZigBee® 802.15.4系统的遥控和监视以及ISM频段的其它应用.本文介绍RF6525主要特性,功能方框图以及RF6525/EM357参考设计电路图与材料清单.

The RF6525 integrates a complete solution in a single Front End Module (FEM) for ZigBee® applications in the 2.4GHz to 2.5GHz band. This FEM integrates the PA plus harmonic filter in the transmit path and the LNA with bypass mode in the receive side. It also integrates a diversity switch and provides balanced input and output signals for both the TX and RX paths respectively.

The RF6525 FEM is ideal for ZigBee® systems operating with a minimum output power of 20dBm and high efficiency requirements. On the receive path, the RX Chain provides 11.5dB of typical gain with only 7mA of current and excellent NF of 2.5dB. This FEM meets or exceeds the system requirements for ZigBee® applications operating in the 2.4GHz to 2.5GHz band.

RF6525主要特性:

TX Output Power: 22dBm

TX Gain: 28dB

RX Gain: 11.5dB

RX NF: 2.5dB

Integrated LNA With Bypass Mode

RF6525应用:

ZigBee® 802.15.4 Based Systems for Remote Monitoring and Control

Other Applications in the ISM Band

图1.RF6525F功能方框图

RF6525/EM35X参考设计

RFMD’s portfolio of single-chip integrated front end modules (FEMs) are developed for high-performance ZigBee^® Home Area Network(HAN) / Smart Energy applications in the 2.4 GHz to 2.5 GHz ISM band. The RF6525, RF6515, and RF6535 are specifically designed to operate with the Ember EM300 Series System-on-Chips (SoCs) - EM351 and EM357, EM250 SoC, and EM260 co-processor. The FEMs address the need for aggressive size reduction in an IEEE 802.15.4 front end design and offer a reduced footprint and minimized component count.

The RF6525/EM35x reference design is a partnership between RFMD and Ember presenting a complete 2.4GHz IEEE 802.15.4-2003-compliant radio transceiver solution. Ember presents a fully integrated system-on-chip (SoC) with 32-bit ARM® Cortex™-M3 microprocessor, flash memory, and RAM memory, delivering unmatched performance and EmberZNet PRO network protocol stack to designers of ZigBee-based systems. RFMD presents a world class front end module (FEM) for efficient extended output power above 20dBm with harmonic filtering, diversity switch, and LNA option for "bypass mode".

This document briefly describes the RF6525/EM35x reference design and how it is set up and configured for Engineering Evaluation of the RF6525 FEM using Ember’s nodetest application firmware, pre-flashed on the EM357 SoC. Snapshots of Tx and Rx data are included.


图2.采用USB接口和电源的RF6525/EM357参考设计外形图

图3.RF6525/EM357参考设计电路图