5 V DOCSIS Upstream Cable Line Driver

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.

The AD8328 is packaged in a low cost 20-lead LFCSP and a 20-lead QSOP. The AD8328 operates from a single 5 V supply and has an operational temperature range of -40°C to +85°C.

* 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

* 5 V supply operation