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  5. LT5575

Data Sheet
PDF
JP
User Guide
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Alternative Parts

LTC5585
LTC5585

Wideband IQ Demodulator with IIP2 and DC Offset Control

Overview

Features and Benefits

  • Input Frequency Range: 0.8GHz to 2.7GHz*
  • 50Ω Single-Ended RF and LO Ports
  • High IIP3: 28dBm at 900MHz, 22.6dBm at 1.9GHz
  • High IIP2: 54.1dBm at 900MHz, 60dBm at 1.9GHz
  • Input P1dB: 13.2dBm at 900MHz
  • I/Q Gain Mismatch: 0.04dB Typical
  • I/Q Phase Mismatch: 0.4° Typical
  • Low Output DC Offsets
  • Noise Figure: 12.8dB at 900MHz, 12.7dB at 1.9GHz
  • Conversion Gain: 3dB at 900MHz, 4.2dB at 1.9GHz
  • Very Few External Components
  • Shutdown Mode
  • 16-Lead QFN 4mm × 4mm Package with Exposed Pad

Product Details

The LT5575 is an 800MHz to 2.7GHz direct conversion quadrature demodulator optimized for high linearity receiver applications. It is suitable for communications receivers where an RF signal is directly converted into I and Q baseband signals with bandwidth up to 490MHz. The LT5575 incorporates balanced I and Q mixers, LO buffer amplifi ers and a precision, high frequency quadrature phase shifter. The integrated on-chip broadband transformers provide 50Ω single-ended interfaces at the RF and LO inputs. Only a few external capacitors are needed for its application in an RF receiver system.

The high linearity of the LT5575 provides excellent spurfree dynamic range for the receiver. This direct conversion demodulator can eliminate the need for intermediate frequency (IF) signal processing, as well as the corresponding requirements for image filtering and IF filtering. Channel filtering can be performed directly at the outputs of the I and Q channels. These outputs can interface directly to channel-select filters (LPFs) or to baseband amplifiers.

Applications

  • Cellular/PCS/UMTS Infrastructure
  • RFID Reader
  • High Linearity Direct Conversion I/Q Receiver

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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 (1)

Documentation & Resources

  • View All (6)
  • Data Sheet (1)
  • Reliability Data (1)
  • User Guide (1)
  • Design Note (1)
  • Technical Article (2)
    • Document Type

    Tools & Simulations

    Design Tool

    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

    LT5575 Companion Parts

    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.View our quality and reliability program and certifications for more information.

    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    LT5575EUF#PBF Material Declaration Reliability Data 16-Lead QFN (4mm x 4mm x 0.75mm w/ EP)
    LT5575EUF#TRPBF Material Declaration Reliability Data 16-Lead QFN (4mm x 4mm x 0.75mm w/ EP)
    Wafer Fabrication Data R409 Reliability Data

    Support & Discussions

    LT5575 Discussions

    RE: LT5575 MxN Spurious Values
    All LT5575 Discussions
    LT5575 Contact ADI Technical Support »
    LT5575 Ask your question »
    LT5575 Contact ADI Technical Support » LT5575 Ask your question »

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    Evaluation Boards

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    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.

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