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AD8327:  5 V CATV Line Driver Coarse Step Output Power Control

Product Details


The AD8327 is a low-cost, digitally controlled, variable gain amplifier optimized for coaxial line driving applications such as cable modems that are designed to the MCNS-DOCSIS upstream standard. An 8-bit serial word determines the desired output gain over a 48.16 dB range resulting in gain changes of 6.02 dB/major carry.

FEATURES and BENEFITS

  • Supports DOCSIS Standard for
    Reverse Path Transmission
  • Gain Programmable in 6.02 dB
    Steps over a 48.16 dB Range
  • Low Distortion at 60 dBmV Output
    –63 dBc SFDR at 21 MHz
    –57 dBc SFDR at 42 MHz
  • Output Noise Level
    –47 dBmV in 160 kHz
  • Maintains 75Ω Output Impedance
    Transmit Enable and Transmit
    Disable Modes
  • Upper Bandwidth:
    160 MHz (Full Gain Range)
  • 5 V Supply Operation
  • Supports SPI Interfaces

Functional Block Diagram for AD8327

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Price Table Help

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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