Description

The AD8324 is a low cost amplifier designed for coaxial linedriving. The features and specifications make the AD8324ideally suited for DOCSIS® 2.0 and EuroDOCSIS applications.The gain of the AD8324 is digitally controlled. An 8-bit serialword 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 1:1transformer.Distortion performance of –54 dBc is achieved with an outputlevel up to 61 dBmV at 65 MHz bandwidth.This device has a sleep mode function that reduces the quiescentcurrent to 30 μA and a full power-down function that reducespower-down current to 2.5 mA.The AD8324 is packaged in a low cost, 20-lead LFCSP and a20-lead QSOP. The AD8324 operates from a single 3.3 V supply. Applications DOCSIS 2.0 and EuroDOCSIS cable modems CATV set-top boxes CATV telephony modems Coaxial and twisted pair line drivers