GENERAL DESCRIPTION
The AD8328 is a low cost amplifier designed for coaxial line driving. The features and specifications make the AD8328 ideally suited for MCNS-DOCSIS and EuroDOCSIS applications. The gain of the AD8328 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.

FEATURES
   Supports DOCSIS and EuroDOCSIS standards for reverse
      path transmission systems
   Gain programmable in 1 dB steps over a 59 dB range
   Low distortion at 60 dBmV output
      −57.5 dBc SFDR at 21 MHz
      −54 dBc SFDR at 65 MHz
   Output noise level @ minimum gain 1.2 nV/√Hz
   Maintains 300 Ω output impedance Tx-enable and
      Tx-disable condition
   Upper bandwidth: 107 MHz (full gain range)
   5 V supply operation
   Supports SPI interfaces

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