LTC5544 - 4GHz to 6GHz High Dynamic Range Downconverting Mixer


  • Conversion Gain: 7.4dB at 5250MHz
  • IIP3: 25.9dBm at 5250MHz
  • Noise Figure: 11.3dB at 5250MHz
  • High Input P1dB
  • IF Bandwidth Up to 1GHz
  • 640mW Power Consumption
  • Shutdown Pin
  • 50Ω Single-Ended RF and LO Inputs
  • +2dBm LO Drive Level
  • High LO-RF and LO-IF Isolation
  • –40°C to 105°C Operation (TC)
  • Small Solution Size
  • 16-Lead (4mm × 4mm) QFN package

Typical Application

LTC5544 Typical Application
LTC5544 Typical Application


The LTC®5544 is part of a family of high dynamic range, high gain passive downconverting mixers covering the 600MHz to 6GHz frequency range. The LTC5544 is optimized for 4GHz to 6GHz RF applications. The LO frequency must fall within the 4.2GHz to 5.8GHz range for optimum performance. A typical application is a WiMAX receiver with a 5.15GHz to 5.35GHz RF input and low side LO.

The LTC5544 is designed for 3.3V operation, however; the IF amplifier can be powered with 5V for the higher P1dB.

The LTC5544’s high level of integration minimizes the total solution cost, board space and system-level variation, while providing the highest dynamic range for demanding receiver applications.


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LTC5544IUF#PBF 4x4 QFN-16 UF I 05-08-1692 Yes
LTC5544IUF#TRPBF 4x4 QFN-16 UF I 05-08-1692 Yes

LTC5544 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LTC5544IUF#PBF 4x4 QFN-16 I $12.10 $8.50 Yes
LTC5544IUF#TRPBF 4x4 QFN-16 I $8.55 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1885A LTC5544 | 4-6GHz Downconverting Mixer Demo Board $125.00
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Click here to view our complete list of demo boards


  • 5GHz WiMAX/WLAN Receiver
  • 4.9GHz Public Safety Bands
  • 4.9GHz to 6GHz Military Communications
  • Point-to-Point Broadband Communications
  • Radar Systems

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Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

  • LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
  • LTpowerCAD - A complete power supply selection, synthesis and design tool
  • LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
  • PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
  • Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
  • LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
  • And More!

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