LTC5583設(shè)計(jì)的雙路6GHz RMS功率檢測技術(shù)
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本文介紹了LTC5583主要特性,方框圖, 單端輸入配置和差分輸入配置測試電路圖以及單端輸入配置圖和差分輸入配置圖.
Linear公司的LTC5583是匹配的雙路6GHz RMS功率檢測器,能測量兩路AC信號(hào),動(dòng)態(tài)范圍從-59dBm 到4dBm,頻率范圍從40MHz 到6GHz,整個(gè)溫度范圍精度為±0.5dB,兩路的匹配輸出小于1.25dB,快速響應(yīng)時(shí)間,上升時(shí)間140ns,主要用在VSWR監(jiān)視器,MIMO發(fā)送功率控制,基站功率放大器控制,發(fā)送和接收增益控制以及RF儀表.
LTC5583主要特性:
Frequency Range: 40MHz to 6GHz
Linear Dynamic Range: Up to 60dB
±0.5dB (Typ) Accuracy Over Temperature
40dB Channel-to-Channel Isolation at 2GHz Even with Single-Ended RF Inputs
Matched Dual-Channel Outputs: 1.25dB (Typ)
Single-Ended RF Inputs—No Transformer Required
Accurate RMS Power Measurement of High Crest
Factor Modulated Waveforms
Difference Output Provides VSWR Measurement
Fast Envelope Detector Outputs
Fast Response Time: 140ns Rise Time
Small 4mm ??4mm QFN24 Package
LTC5583應(yīng)用:
VSWR Monitor
MIMO Transmit Power Control
Basestation PA Control
Transmit and Receive Gain Control
RF Instrumentation
圖1.LTC5583方框圖
圖2.LTC5583測試電路圖:40MHz-3GHz,單端輸入配置
圖3.LTC5583測試電路圖:2GHz-6GHz,差分輸入配置
圖4.LTC5583單端輸入配置圖
圖5.LTC5583差分輸入配置圖
圖6.LTC5583評(píng)估板單端輸入配置PCB布局圖(頂層)
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