AD8325ARUZ-REEL ADI (亞德諾) 緩沖放大器
產品概述
5 V CATV線路驅動器精細步驟輸出功率控制 5 V CATV Line Driver Fine Step Output Power Control
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.
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
