Overview

Features and Benefits

  • Wide RF Frequency Range: 400MHz to 3.8GHz*
  • High Input IP3:
    • 25.6dBm at 900MHz
    • 24.7dBm at 1950MHz
    • 23.7dBm at 2.6GHz
  • Conversion Gain:
    • 3.3dB at 900MHz
    • 2.9dB at 1950MHz
  • –3dBm LO Drive Level
  • Low LO Leakage
  • Low Noise Figure:
    • 10.6dB at 900MHz
    • 11.7dB at 1950MHz
  • Low Power: 3.3V/269mW
  • 50Ω Single-Ended RF and LO Ports
  • Very Few External Components
  • 16-Lead (4mm × 4mm) QFN Package

Product Details

The LT5557 active mixer is optimized for high linearity, wide dynamic range downconverter applications. The IC includes a high speed differential LO buffer amplifier driving a double-balanced mixer. Broadband, integrated transformers on the RF and LO inputs provide single-ended 50Ω interfaces. The differential IF output allows convenient interfacing to differential IF filters and amplifiers, or is easily matched to drive a single-ended 50Ω load, with or without an external transformer.

The RF input is internally matched to 50Ω from 1.6GHz to 2.3GHz, and the LO input is internally matched to 50Ω from 1GHz to 5GHz. The frequency range of both ports is easily extended with simple external matching. The IF output is partially matched and usable for IF frequencies up to 600MHz.

The LT5557’s high level of integration minimizes the total solution cost, board space and system-level variation.

Applications

  • Cellular, CDMA, WCDMA, TD-SCDMA and UMTS Infrastructure
  • WiMAX
  • Wireless Infrastructure Receiver
  • Wireless Infrastructure PA Linearization
  • 900MHz/2.4GHz/3.5GHz WLAN

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (2)

Tools & Simulations

S-Parameters

Design Tools

ADIsimRF

ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.

Product Recommendations

LT5557 Companion Parts

Recommended ADCs

Recommended Output Amplifiers

Recommended Related Parts

Recommended Suggested Oscillator

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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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 Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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Evaluation Boards Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.