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LTC5543 - 2.3GHz to 4GHz High Dynamic Range Downconverting Mixer

The LTC5543 is part of a family of high dynamic range, high gain passive downconverting mixers covering the 600MHz to 4GHz frequency range. The LTC5543 is optimized for 2.3GHz to 4GHz RF applications. The LO frequency must fall within the 2.4GHz to 3.6GHz range for optimum performance. A typical application is a LTE or WiMAX receiver with a 2.3GHz to 2.7GHz RF input and high-side LO.

The LTC5543 is designed for 3.3V operation, however; the IF amplifier can be powered by 5V for the highest P1dB. An integrated SPDT LO switch with fast switching accepts two active LO signals, while providing high isolation.

The LTC5543’s high conversion gain and high dynamic range enable the use of lossy IF filters in high-selectivity receiver designs, while minimizing the total solution cost, board space and system-level variation.

Features Conversion Gain: 8.4dB at 2500MHz IIP3: 24.5dBm at 2500MHz Noise Figure: 10.2dB at 2500MHz 17.5dB NF Under +5dBm Blocking High Input P1dB 3.3V Supply, 660mW Power Consumption Shutdown Pin 50Ω Single-Ended RF and LO Inputs LO Inputs 50Ω Matched when Shutdown High Isolation LO Switch 0dBm LO Drive Level High LO-RF and LO-IF Isolation Small Solution Size 20-Lead (5mm × 5mm) QFN package Typical Application

Applications Wireless Infrastructure Receivers (LTE, WiMAX, WCS) Point-To-Point Microwave Links High Dynamic Range Downmixer Applications Packaging

Demo Boards