ADL5385:  50 MHz to 2200 MHz Quadrature Modulator

The ADL5385 is a silicon, monolithic, quadrature modulator that is designed for use from 50 MHz to 2200 MHz. Its excellent phase accuracy and amplitude balance enable high-performance IF or direct RF ...More

ADL5385:  50 MHz to 2200 MHz Quadrature Modulator

Product Description

The ADL5385 is a silicon, monolithic, quadrature modulator that is designed for use from 50 MHz to 2200 MHz. Its excellent phase accuracy and amplitude balance enable high-performance IF or direct RF modulation for communication systems.

The AD5385 takes the signals from two differential baseband inputs and modulates them onto two carriers in quadrature with each other. The two internal carriers are derived from a single-ended, external local oscillator input signal at twice the frequency as the desired carrier output. The two modulated signals are summed together in a differential-to-single-ended amplifier designed to drive 50 Ω loads.

The ADL5385 can be used as either an IF or a direct-to-RF modulator in digital communication systems. The wide baseband input bandwidth allows for either baseband drive or drive from a complex IF. Typical applications are in radio-link transmitters, cable modem termination systems, and broadband wireless access systems. The ADL5385 is fabricated using the Analog Devices, Inc., advanced silicon germanium bipolar process and is packaged in a 24-lead, Pb-free LFCSP_VQ with exposed paddle. Performance is specified over –40°C to +85°C. A Pb-free evaluation board is also available.

Applications

  • Radio-link infrastructure
  • Cable modem termination systems
  • Wireless infrastructure systems
  • Wireless local loop
  • WiMAX/broadband wireless access systems

    • Features

    • Output frequency range: 50 MHz to 2200 MHz
    • 1 dB output compression: 11 dBm @ 350 MHz
    • Noise floor: –159 dBm/Hz @ 350 MHz
    • Sideband suppression: −50 dBc @ 350 MHz
    • Carrier feedthrough: −46 dBm @ 350 MHz
    • Single supply: 4.75 V to 5.5 V
    • 24-lead, Pb-free LFCSP_VQ with exposed paddle

    Verified Circuits Using This Part

    Verified Circuits are designed for ease of use and proven to work by ADI applications engineers. To learn more about Verified Circuits from ADI, please visit Verified Circuits Home.

    Circuit Diagram

    Diagrams

    ADL5385 Diagram
    Functional Block Diagram for ADL5385

    Specifications

    Function Mod
    RF Freq (MHz) 50 to 2200
    IQ Freq (MHz) 500MHz
    Phase Error (deg) 0.33Deg
    Amplitude Error (dB) 0.03dB
    Noise Floor (dBm/Hz) -160
    Voltage Supply (V) 4.75 to 5.5
    Supply Current (max) 215mA
    Package 24-Lead LFCSP

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