AD8325ARUZ-REEL
数据手册.pdfADI(亚德诺)
主动器件
5 V CATV线路驱动器精细步骤输出功率控制 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
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- Supports DOCSIS Standard for Reverse Path Transmission
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- Gain Programmable in 0.75 dB Steps Over a 59.45 dB Range
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- Low Distortion at 61 dBmV Output
–57 dBc SFDR at 21 MHz
–55 dBc SFDR at 42 MHz
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- Output Noise Level: –48 dBmV in 160 kHz
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- Maintains 75Ω Output Impedance
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- Transmit Enable and Transmit Disable Modes
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- Upper Bandwidth:100 MHz Full Gain Range
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- 5 V Supply Operation
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- Supports SPI Interfaces
