GENERAL DESCRIPTION
The AD8324 1 is a low cost amplifier designed for coaxial line driving. The features and specifications make the AD8324 ideally suited for DOCSIS 2.0 and Euro-DOCSIS 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.

FEATURES
    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 TX-enable and Transmit-disable condition
    Upper bandwidth: 100 MHz (full gain range)
    3.3 V supply operation
    Supports SPI® interfaces

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