LTC5569 - 300MHz to 4GHz 3.3V Dual Active Downconverting Mixer


  • High IIP3: 26.8dBm at 1950MHz
  • 2dB Conversion Gain
  • Low Noise Figure: 11.7dB at 1950MHz
  • 17dB NF Under 5dBm Blocking
  • 44dB Channel Isolation
  • Low Power: 3.3V/600mW Total
  • Very Small Solution Size
  • Enable Pins for Each Mixer
  • Wide IF Frequency Range
  • LO Input 50Ω Matched in All Modes
  • –40°C to 105°C Operation
  • 16-Lead (4mm × 4mm) QFN package

Typical Application

LTC5569 Typical Application
LTC5569 Typical Application


The LTC®5569 dual active downconverting mixer is optimized for diversity and MIMO receiver applications that require low power and small size. Each mixer includes an independent LO buffer amplifier, active mixer core, and bias circuit with enable pin. The symmetry of the IC assures that a phase and amplitude coherent LO is applied to each mixer.

The RF inputs are 50Ω matched from 1.4GHz to 3.3GHz, and easily matched for higher or lower RF frequencies with simple external matching. The LO input is 50Ω matched from 1GHz to 3.5GHz, even when one or both mixers are disabled. The LO input is easily matched for higher or lower frequencies, as low as 350MHz, with simple external matching. The low capacitance differential IF outputs are usable up to 1.6GHz.


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
LTC5569IUF#PBF 4x4 QFN-16 UF I 05-08-1692 Yes
LTC5569IUF#TRPBF 4x4 QFN-16 UF I 05-08-1692 Yes

LTC5569 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
LTC5569IUF#PBF 4x4 QFN-16 I $12.14 $8.50 Yes
LTC5569IUF#TRPBF 4x4 QFN-16 I $8.56 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
DC1719A LTC5569 | Dual Wideband Active Mixer Demo Circuit, RF=1.4 to 3.3GHz, IF=190MHz. $125.00
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Click here to view our complete list of demo boards


  • Wireless Infrastructure Diversity Receivers
  • MIMO Infrastructure Receivers
  • Remote Radio Units

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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
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