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AD8324:  3.3 V DOCSIS 2.0 Upstream Cable Line Driver

Product Details

The AD8324 is a low cost amplifier designed for coaxial line driving. The features and specifications make the AD8324 ideally suited for DOCSIS 2.0 and EuroDOCSIS applications. The gain of the AD8324 is digitally controlled. An 8-bit serial word determines the desired output gain over a 59 dB range, resulting in gain changes of 1 dB/LSB.

The AD8324 accepts a differential or single-ended input signal. The output is specified for driving a 75 Ω load through a 1:1 transformer.

Distortion performance of -54 dBc is achieved with an output level up to 61 dBmV at 65 MHz bandwidth.

This device has a sleep mode function that reduces the quiescent current to 30 µA and a full power-down function that reduces power-down current to 2.5 mA.

The AD8324 is packaged in a low cost 20-lead LFCSP package and a 20-lead QSOP package. The AD8324 operates from a single 3.3 V supply.

DOCSIS is a registered trademark of Cable Television Laboratories, Inc.


  • DOCSIS 2.0 and EuroDOCSIS cable modems
  • CATV set-top boxes
  • CATV telephony modems
  • Coaxial and twisted pair line drivers

    • Supports DOCSIS 2.0 and Euro-DOCSIS standards for reverse path transmission systems
    • Gain programmable in 1 dB steps over a 59 dB range
    • Low distortion at 61 dBmV output:
      –59 dBc SFDR at 21 MHz
      –54 dBc SFDR at 65 MHz
    • Output noise level @ minimum gain 1.3 nV/√Hz
    • Maintains 75 Ω output impedance in transmit-enable and transmit-disable condition
    • Upper bandwidth: 100 MHz (full gain range)
    • 3.3 V supply operation
    • Supports SPI® interfaces

    Functional Block Diagram for AD8324

    Evaluation Kits & Symbols & Footprints

    Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

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    Price, packaging, availability

    AD8324 Model Options
    Model Package Pins Temp.
    Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    AD8324ACPZ Status: Production 20 ld LFCSP (4x4mm) 20 Ind Tray, 490 $1.55 $1.35 Y  Material Info PCN Purchase
    AD8324ACPZ-REEL7 Status: Production 20 ld LFCSP (4x4mm) 20 Ind Reel, 1500 - $1.35 Y  Material Info PCN Purchase Sample
    AD8324JRQ-REEL Status: Last Time Buy 20 ld QSOP 20 Comm. Reel, 2500 - - N  Material Info PCN/PDN Purchase
    AD8324JRQ-REEL7 Status: Last Time Buy 20 ld QSOP 20 Comm. Reel, 1000 - - N  Material Info PCN/PDN Purchase
    AD8324JRQZ-REEL Status: Last Time Buy 20 ld QSOP 20 Comm. Reel, 2500 - $1.87 Y  Material Info PCN/PDN Purchase
    AD8324JRQZ-REEL7 Status: Production 20 ld QSOP 20 Comm. Reel, 1000 - $1.87 Y  Material Info PCN Purchase
    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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