LTC5577 - 300MHz to 6GHz High Signal Level Active Downconverting Mixer


  • +30dBm IIP3
  • +15dBm Input P1dB
  • 0dB Conversion Gain
  • Wideband Differential IF Output
  • Very Low 2 × 2 and 3 × 3 Spurs
  • IF Frequency Range Up to 1.5GHz
  • Low LO-RF Leakage
  • LO Input 50Ω Matched when Shutdown
  • –40°C to 105°C Operation (TC)
  • Very Small Solution Size
  • 16-Lead (4mm × 4mm) QFN package

Typical Application

LTC5577 Typical Application
LTC5577 Typical Application


The LTC®5577 active mixer is optimized for RF downconverting applications that require high input signal handling capability and wide bandwidth. The wideband IF output uses external resistors to set the output impedance, allowing the flexibility to match directly into differential IF loads, such as filters and amplifiers. The part is characterized and specified with a 100Ω differential output impedance, although it can be used with output impedances ranging from 50Ω to 400Ω, with higher gain and reduced IIP3 and P1dB at the higher impedance levels. The IF output is usable up to 1.5GHz.

In receiver applications, the high input P1dB and IIP3 allow the use of higher gain low noise amplifiers, resulting in higher receiver sensitivity. Integrated transformers on the RF and LO inputs provide single-ended 50Ω interfaces, while minimizing the solution size.


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
LTC5577IUF#PBF 4x4 QFN-16 UF I 05-08-1692 Yes
LTC5577IUF#TRPBF 4x4 QFN-16 UF I 05-08-1692 Yes

LTC5577 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
LTC5577IUF#PBF 4x4 QFN-16 I $9.64 $6.75 Yes
LTC5577IUF#TRPBF 4x4 QFN-16 I $9.70 $6.81 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
DC2070A LTC5577 | 300MHz to 6GHz High Signal Level Active Downconverting Mixer $125.00
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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:

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