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 59dB 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? 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 30mA and a full power-down function that reduces power-down current to 2.5mA.
The AD8324 is packaged in a low cost 20-lead LFCSP package and a 20-lead QSOP package. The AD8324 operates from a single 3.3V supply.
- Supports DOCSIS 2.0 and Euro-DOCSIS standards
- Gain programmable in 1dB steps over a 59dB range
- Low distortion at 61dBmV output
- Maintains 75ohm output impedance
- Upper bandwidth is 100MHz
- 3.3V supply operation
- Supports SPI interfaces
- Applicable for:
- DOCSIS 2.0 and EuroDOCSIS cable modems
- CATV set-top boxes
- CATV telephony modems
- Coaxial and twisted pair line drivers
