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(cè)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(cè)器,能測(cè)量?jī)陕稟C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(cè)試電路圖:40MHz-3GHz,單端輸入配置

圖3.LTC5583測(cè)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)