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AD8325: 5 V CATV Line Driver Fine Step Output Power Control Data Sheet (Rev. A)5/5/2001PDF731 kB
Overview
Features and Benefits
- Supports DOCSIS Standard for Reverse Path Transmission
- Gain Programmable in 0.75 dB Steps Over a 59.45 dB Range
- Low Distortion at 61 dBmV Output
–57 dBc SFDR at 21 MHz
–55 dBc SFDR at 42 MHz - Output Noise Level: –48 dBmV in 160 kHz
- Maintains 75Ω Output Impedance
- Transmit Enable and Transmit Disable Modes
- Upper Bandwidth:100 MHz (Full Gain Range)
- 5 V Supply Operation
- Supports SPI Interfaces
Product Details
The AD8325 is a low-cost, digitally controlled, variable gain amplifier optimized for coaxial line driving applications such as cable modems that are designed to the MCNS-DOCSIS upstream standard. An 8-bit serial word determines the desired output gain over a 59.45 dB range resulting in gain changes of 0.7526 dB/LSB.
The AD8325 is packaged in a low-cost 28-lead TSSOP, operates from a single 5 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 AD8325-EVAL.Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
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AN-851: A WiMax Double Downconversion IF Sampling Receiver Design (Rev. 0)7/26/2006PDF262 kB
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FAQs7/26/2017
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Variable Gain Amplifier Selection Table10/2/2008PDF68 kB
