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.
|Title||Content Type||File Type|
|AD8321: Gain Programmable CATV Line Driver Data Sheet (Rev A, 06/2005) (pdf, 716 kB)||Data Sheets|
|AN-851: A WiMax Double Downconversion IF Sampling Receiver Design (pdf, 262 kB)||Application Notes|
|Design and Operation of Automatic Gain Control Loops for Receivers in Modern Communication Systems (pdf, 129 kB)||Tutorials|
|Variable Gain Amplifier Selection Table (pdf, 68 kB)||Product Selection Guide|
|Leading Inside Advertorials: Solving Dynamic Range Problems in Analog Systems (pdf, 75 kB)||Overview|
|What are Variable Gain Amplifiers (VGA's) and how are they used?||FAQs/RAQs||HTML|
|RAQs index||Rarely Asked Questions||HTML|
|Glossary of EE Terms||Glossary||HTML|
Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.