The AD8325ARUZ 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 AD8325ARUZ 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.Feature
- 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
(Picture: Pinout)
