原标题：ADI ADRF5547双通道RF(3．7－5．3 GHz)前端解决方案

　　ADI公司的ADRF5547是双通道集成RF前端多芯片模块,工作频率3.7- 5.3 GHz,具有2 级 LNA 和高功率 SPDT 开关,片内偏置和匹配,单电源供电,高增益模式4.6 GHz 时为 33 dB(典型值),低增益模式4.6 GHz 时为 18 dB(典型值),噪声指数高增益模式时4.6 GHz 时为 1.6 dB(典型值),低增益模式4.6 GHz 时为1.6 dB(典型值),LTE 平均功率 (9 dB PAR)为40 dBm,OIP3为31 dBm(典型值),插入损耗4.6 GHz 时为 0.5 dB(典型值),高增益模式电源电流5 V 时为 86 mA(典型值),低增益模式电源电流5 V 时为 36 mA(典型值),关断模式电源电流5 V 时为 12 mA(典型值).正逻辑控制,主要用在无线基础设备,TDD多输入和多输出(MIMO)和有源天线系统,基于TDD的通信系统.本文介绍了ADRF5547主要特性,功能框图, 应用电路图,评估板ADRF5547-EVALZ主要特性,测试建立图,电路图,材料清单和PCB装配图.

　　The ADRF5547 is a dual-channel, integrated RF, front end multichip module designed for time division duplexing (TDD) applications that operates from 3.7 GHz to 5.3 GHz. The ADRF5547 is configured in dual channels with a cascading two-stage low noise amplifier (LNA) and a high power silicon, single-pole, double-throw (SPDT) switch.

　　In high gain mode, the cascaded, two-stage LNA and switch offer a low noise figure of 1.6 dB and high gain of 33 dB at 4.6 GHz with an output third order intercept point (OIP3) of 31 dBm (typical).

　　In low gain mode, one stage of the two-stage LNAs is in bypass, providing 18 dB gain at lower current of 36 mA. In power-down mode, the LNAs are turned off and the device draws 12 mA.

　　In transmit operation, when RF inputs are connected to a termination pin (TERM-ChA or TERM-ChB), the switch provides a low insertion loss of 0.50 dB and handles long term evolution (LTE) average power (9 dB peak to average ratio (PAR)) of 40 dBm for full lifetime operation and 43 dBm for single event (<10 sec) LNA protection operation. The device comes in an RoHS compliant, compact, 40-lead, 6 mm × 6 mm LFCSP.

　　ADRF5547主要特性:

　　Integrated dual-channel RF front end

　　2-stage LNA and high power SPDT switch

　　On-chip bias and matching

　　Single-supply operation

　　Gain

　　High gain mode: 33 dB typical at 4.6 GHz

　　Low gain mode: 18 dB typical at 4.6 GHz

　　Low noise figure

　　High gain mode: 1.6 dB typical at 4.6 GHz

　　Low gain mode: 1.6 dB typical at 4.6 GHz

　　High channel to channel isolation

　　Between RxOUT-ChA and RxOUT-ChB: 45 dB typical

　　Between TERM-ChA and TERM-ChB: 53 dB typical

　　Low insertion loss: 0.50 dB typical at 4.6 GHz

　　High power handling at TCASE = 105℃

　　Full lifetime

　　LTE average power (9 dB PAR): 40 dBm

　　Single event (<10 sec operation)

　　LTE average power (9 dB PAR): 43 dBm

　　High OIP3: 31 dBm typical

　　Power-down mode and low gain mode for LNA

　　Low supply current

　　High gain mode: 86 mA typical at 5 V

　　Low gain mode: 36 mA typical at 5 V

　　Power-down mode: 12 mA typical at 5 V

　　Positive logic control 40-lead, 6 mm × 6 mm LFCSP

　　ADRF5547应用:

　　Wireless infrastructure

　　TDD massive multiple input and multiple output (MIMO) and active antenna systems

　　TDD-based communication systems

　　图1.ADRF5547功能框图

　　图2. ADRF5547应用电路图

　　评估板ADRF5547-EVALZ

　　Evaluating the ADRF5547 Dual-Channel,3.7 GHz to 5.3 GHz, Receiver Front End

　　The ADRF5547 is an integrated RF, dual-channel receiver front end, ideally suited for time division duplexing (TDD) wireless infrastructure applications. The ADRF5547 consists of a high power switch and a two-stage low noise amplifier (LNA) on each channel. This user guide describes the ADRF5547-EVALZ evaluation board, designed to easily evaluate the features and performance of the ADRF5547. A photograph of the evaluation board is shown in Figure 3. The ADRF5545A, the ADRF5547, and the ADRF5549 are pin compatible receiver front ends that cover different frequency bands and that use the same evaluation printed circuit board (PCB). However, the ADRF5545A requires a few external matching components (see UG-1589 for additional information). The ADRF5547 data sheet provides full specifications for the ADRF5547. Consult the ADRF5547 data sheet in conjunction with this user guide when using the evaluation board.

　　评估板ADRF5547-EVALZ主要特性:

　　Full featured evaluation board for the ADRF5547

　　Easy connection to test equipment

　　Thru line for calibration

　　EQUIPMENT NEEDED

　　DC power supply

　　Signal generator

　　Spectrum analyzer

　　Network analyzer

　　图3.评估板ADRF5547-EVALZ外形图

　　图4.评估板ADRF5547-EVALZ测试建立图

　　图5.评估板ADRF5547-EVALZ电路图

　　评估板ADRF5547-EVALZ材料清单: