LTC5583設計的雙路6GHz RMS功率檢測技術

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,動態范圍從-59dBm 到4dBm,頻率范圍從40MHz 到6GHz,整個溫度范圍精度為±0.5dB,兩路的匹配輸出小于1.25dB,快速響應時間,上升時間140ns,主要用在VSWR監視器,MIMO發送功率控制,基站功率放大器控制,發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評估板單端輸入配置PCB布局圖(頂層)