LTC5548 - 2GHz to 14GHz Microwave Mixer with Wideband DC–6GHz IF


  • Upconversion or Downconversion
  • High IIP3: +24.4dBm at 5.8GHz
    +21.4dBm at 9GHz
  • 7.1dB Conversion Loss at 5.8GHz
  • +15.2dBm Input P1dB at 5.8GHz
  • Integrated LO Buffer: 0dBm LO Drive
  • Selectable Integrated LO Frequency Doubler
  • Low LO-RF Leakage: <–30dBm
  • 50Ω Wideband Matched RF and LO Ports
  • 3.3V/120mA Supply
  • Fast Turn ON/OFF for TDD Operation
  • 3mm × 2mm, 12-Lead QFN Package

Typical Application

LTC5548 Typical Application
LTC5548 Typical Application


The LTC®5548 is a high performance, microwave double balanced passive mixer that can be used for frequency upconversion or downconversion. The device is similar to the LTC5549, but with a broadband, differential DC to 6GHz IF port. The LTC5548 is recommended for applications where the IF frequency range extends below 500MHz. For applications where the IF frequency is always above 500MHz, the LTC5549 is recommended, since it includes an integrated IF balun.

The LTC5548’s mixer and integrated RF balun are optimized to cover the 2GHz to 14GHz RF frequency range. The device includes an integrated LO amplifier optimized for the 1GHz to 12GHz frequency range, requiring only 0dBm drive. The device also includes an integrated LO frequency doubler, which can be enabled or disabled with a CMOS-compatible control pin.

The LTC5548 delivers exceptionally high IIP3 and P1dB, in addition to very low LO to RF and LO to IF leakages. The part also offers high integration in a small package.


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
LTC5548IUDB#PBF 3x2 QFN-12 UDB I 05-08-1985 Yes
LTC5548IUDB#TRMPBF 3x2 QFN-12 UDB I 05-08-1985 Yes
LTC5548IUDB#TRPBF 3x2 QFN-12 UDB I 05-08-1985 Yes

LTC5548 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
LTC5548IUDB#PBF 3x2 QFN-12 I $13.58 Yes
LTC5548IUDB#TRMPBF 3x2 QFN-12 I $13.58 $9.55 Yes
LTC5548IUDB#TRPBF 3x2 QFN-12 I $13.58 $9.50 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
DC2461A LTC5548 Demo Board | 2GHz to 14GHz Microwave Mixer with Low IF Frequency $200.00
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