Product description
The AD8321 is a low cost digitally controlled variable gain amplifier optimized for coaxial line driving applications such as cable modems that are designed to the DOCSIS* (upstream) standard. An 8-bit serial word determines the desired output gain over a 53.4 dB range, resulting in gain changes of 0.75 dB/LSB.
The AD8321 is packaged in a low cost 20-lead SOIC, operates from a single +9 V supply, and has an operational temperature range of -40°C to +85°C.
An evaluation board is available for this product and may be ordered using the following product number: AD8321-EVAL. Schematic and layout for this evaluation board is contained in the product datasheet.
* Linear in dB Gain Response Over >53 dB Range
* Drives Low Distortion >11 dBm Signal into 75 ? Load: -53 dBc SFDR at 42 MHz
* Very Low Output Noise Level
* Maintains Constant 75 ? Output Impedance
Power-Up and Power-Down Condition
No Line Transformer Required
* Upper Bandwidth:
235 MHz (Min Gain)
* 9 V Single Supply Operation
* Power-Down Functionality
* Supports SPI Interface
* Low Cost
The AD8321 is packaged in a low cost 20-lead SOIC, operates from a single +9 V supply, and has an operational temperature range of -40°C to +85°C.
An evaluation board is available for this product and may be ordered using the following product number: AD8321-EVAL. Schematic and layout for this evaluation board is contained in the product datasheet.
* Linear in dB Gain Response Over >53 dB Range
* Drives Low Distortion >11 dBm Signal into 75 ? Load: -53 dBc SFDR at 42 MHz
* Very Low Output Noise Level
* Maintains Constant 75 ? Output Impedance
Power-Up and Power-Down Condition
No Line Transformer Required
* Upper Bandwidth:
235 MHz (Min Gain)
* 9 V Single Supply Operation
* Power-Down Functionality
* Supports SPI Interface
* Low Cost