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Features
- Supports DOCSIS Standard for
Reverse Path Transmission - Gain Programmable in 6.02 dB
Steps over a 48.16 dB Range - Low Distortion at 60 dBmV Output
–63 dBc SFDR at 21 MHz
–57 dBc SFDR at 42 MHz - Output Noise Level
–47 dBmV in 160 kHz
- Maintains 75Ω Output Impedance
Transmit Enable and Transmit
Disable Modes - Upper Bandwidth: 160 MHz (Full Gain Range)
- 5 V Supply Operation
- Supports SPI Interfaces
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The AD8327 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 48.16 dB range resulting in gain changes of 6.02 dB/major carry.
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AD8327
Documentation
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Evaluation Kits 1
EVAL-AD8327
AD8327 Evaluation Board
Product Detail
This control software is for the AD8327. An 8-bit serial word determines the desired output gain over a 48.16 dB range, resulting in gain changes of 6.02 dB/major carry. Full data on the AD8327 and the evaluation board features is available in the AD8327 datasheet available and should be consulted in conjunction with this Technical Note when using the Evaluation Board. On-board components include an input transformer to convert single ended input signals into a differential signal, a diplexer to allow insertion into a cable modem system, and various options for input and output terminations.
