AD8324 3.3 V DOCSIS 2.0 Upstream Cable Line Driver

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 and a 20-lead QSOP. The AD8324 operates from a single 3.3 V supply.

Applications

Features and Benefits
  • Supports DOCSIS 2.0 and EuroDOCSIS specifications 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
  • −59 dBc SFDR at 21 MHz
  • −54 dBc SFDR at 65 MHz
  • Output noise level at minimum gain 1.3 nV/√Hz
  • Maintains 75 Ω output impedance in transmit-enable and transmit-disable condition
  • Upper bandwidth of 100 MHz (full gain range)
  • 3.3 V supply operation
  • Supports SPI® interfaces
  • Amplifiers
    Broadband
    Data Sheets
    Documentnote
    AD8324: 3.3 V Upstream Cable Line Driver Data Sheet (Rev. C)PDF 417.25 K
    Application Notes
    Documentnote
    AN-851: A WiMax Double Downconversion IF Sampling Receiver Design (Rev. 0)PDF 262 kB
    Frequently Asked Questions
    Documentnote
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    AD8324ACPZ Production20 ld LFCSP 4x4mm (2.1EP) OTH 490-40 to 85C1.551.35Y
    AD8324ACPZ-REEL7 Production20 ld LFCSP 4x4mm (2.1EP) REEL 1500-40 to 85C01.35Y
    AD8324JRQZ-REEL7 Production20 ld QSOPREEL 1000-25 to 70C01.87Y
    Reference Materials
    AD8324: 3.3 V Upstream Cable Line Driver Data Sheet (Rev. C) ad8324
    AN-851: 一种WiMax双下变频IF采样接收机设计方案[中文版] (Rev. 0) ad9540
    AN-851: A WiMax Double Downconversion IF Sampling Receiver Design (Rev. 0) ad9856
    Variable Gain Amplifier Selection Table ad8369