LTC5541 - 1.3GHz to 2.3GHz High Dynamic Range Downconverting Mixer


  • Conversion Gain: 7.8dB at 1950MHz
  • IIP3: 26.4dBm at 1950MHz
  • Noise Figure: 9.6dB at 1950MHz
  • 16dB NF Under +5dBm Blocking
  • High Input P1dB
  • 3.3V Supply, 630mW 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

LTC5541 Typical Application
LTC5541 Typical Application


The LTC5541 is part of a family of high dynamic range passive, high gain downconverting mixers covering the 600MHz to 4GHz frequency range. The LTC5541 is optimized for 1.3GHz to 2.3GHz RF applications. The LO frequency must fall within the 1.4GHz to 2.0GHz range for optimum performance. A typical application is a LTE or W-CDMA receiver with a 1.7GHz to 2.2GHz RF input and low-side LO.

The LTC5541 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 LTC5541’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.


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
LTC5541IUH#PBF 5x5 QFN-20 UH I 05-08-1818 Yes
LTC5541IUH#TRPBF 5x5 QFN-20 UH I 05-08-1818 Yes

LTC5541 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
LTC5541IUH#PBF 5x5 QFN-20 I $9.25 $6.50 Yes
LTC5541IUH#TRPBF 5x5 QFN-20 I $6.55 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
DC1431A-B LTC5541IUH Demo Board | Optimized for RF=1.3-2.3GHz, LO=1.4-2GHz, IF=190MHz $125.00
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Click here to view our complete list of demo boards


  • Wireless Infrastructure Receivers
  • Point-To-Point Microwave Links
  • High Dynamic Range Downmixer Applications

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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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