LT5512 - 1kHz-3GHz High Signal Level Active Mixer


  • Broadband RF, LO and IF Operation
  • High Input IP3: >20dBm from 30MHz to 900MHz
          +17dBm at 1900MHz
  • Typical Conversion Gain: 1dB
  • SSB Noise Figure: 11dB at 900MHz
          14dB at 1900MHz
  • Integrated LO Buffer: Insensitive to LO Drive Level
  • Single-Ended or Differential LO Drive
  • High LO-RF Isolation
  • Enable Function
  • 4.5V to 5.25V Supply Voltage Range
  • 4mm x 4mm QFN Package

Typical Application

LT5512 Typical Application
LT5512 Typical Application


The LT5512 is an active double-balanced mixer IC, optimized for high linearity HF, VHF and UHF applications. The IC includes an integrated LO buffer amplifi er to drive the mixer and an RF buffer amplifi er for improved LO-RF isolation. Internal bias circuits eliminate the need for precision external resistors and allow the device to be powered-down using the enable control (EN) pin.

The externally matched RF and IF ports allow the mixer to be used at very low frequencies, below 1MHz or up to 3GHz. The differential LO input is designed for single-ended or a differential input drive.

The LT5512 is a high-linearity alternative to passive diode mixers. Unlike passive mixers, which have conversion loss and require high LO drive levels, the LT5512 delivers conversion gain and requires signifi cantly lower LO drive levels.


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
LT5512EUF#PBF 4x4 QFN-16 UF E 05-08-1692 Yes
LT5512EUF#TRPBF 4x4 QFN-16 UF E 05-08-1692 Yes

LT5512 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
LT5512EUF#PBF 4x4 QFN-16 E $5.27 $3.70 Yes
LT5512EUF#TRPBF 4x4 QFN-16 E $3.80 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
DC478B LT5512EUF | High Signal Level, Down-Converting Mixer, (1.9GHz PCS Band) $125.00
DC503A LT5512EUF | High Signal Level, Down-Converting Mixer, (Wide IF Output, CATV Applications) $125.00
DC933A LT5512EUF | Low Frequency (<450MHz) Demo Board $125.00
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Click here to view our complete list of demo boards


  • HF/VHF/UHF Mixer
  • Cellular/PCS/UMTS Infrastructure
  • High Linearity Mixer Applications
  • ISM Band Receivers
  • Wireless Medical Telemetry System (WMTS)

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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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