LTC5553 - 3GHz to 20GHz Microwave Mixer


  • Upconversion or Downconversion
  • High IIP3:
    +24.3dBm at 10GHz
    +21.5dBm at 17GHz
  • 9dB Conversion Loss at 10GHz
  • +16dBm Input P1dB at 10GHz
  • Integrated LO Buffer: 0dBm LO Drive
  • Low LO-RF Leakage: <–25dBm
  • 50Ω Wideband Matched RF, LO and IF Ports
  • 3.3V/132mA Supply
  • Fast Turn ON/OFF for TDD Operation
  • 3mm × 2mm, 12-Lead QFN Package

Typical Application

LTC5553 Typical Application
LTC5553 Typical Application


The LTC®5553 is a high performance, microwave double balanced passive mixer that can be used for frequency upconversion or downconversion.

The LTC5553’s mixer and integrated RF balun are optimized to cover the 3GHz to 20GHz RF frequency range. The device includes an integrated LO amplifier optimized for the 1GHz to 20GHz frequency range, requiring only 0dBm drive. The integrated IF balun is optimized to cover a very wide, 500MHz to 9GHz, frequency range while providing a single-ended 50Ω interface.

The LTC5553 delivers exceptionally high IIP3 and P1dB, in addition to low LO to RF and LO to IF leakages. The part also offers a high level of integration in a small package.


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

Part Number Package Code Temp Package
LTC5553IUDB#PBF 3x2 QFN-12 UDB I 05-08-1985 Yes
LTC5553IUDB#TRMPBF 3x2 QFN-12 UDB I 05-08-1985 Yes
LTC5553IUDB#TRPBF 3x2 QFN-12 UDB I 05-08-1985 Yes

LTC5553 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
LTC5553IUDB#PBF 3x2 QFN-12 I $31.43 Yes
LTC5553IUDB#TRMPBF 3x2 QFN-12 I $31.43 $22.05 Yes
LTC5553IUDB#TRPBF 3x2 QFN-12 I $31.50 $22.00 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
DC2566A LTC5553 | 3GHz to 20GHz Passive Bidirectional Mixer $350.00
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Click here to view our complete list of demo boards


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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
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  • 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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