5 V CATV Line Driver Coarse Step Output Power Control

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. The AD8327 comprises a digitally controlled variable Attenuator of 0 dB to 48.16dB, which is preceded by a low noise, fixed gain Buffer and followed by a low distortion, high power Amplifier The AD8327 accepts a differential or single-ended input signal. The output is specified for driving a 75 ? load, such as coaxial cable. Distortion performance of 63 dBc is achieved with an outpu level up to 60 dBmV at 21MHz bandwidth. A key performance and cost advantage of the AD8327 results from the ability to maintain a constant 75 ? output impedance during Transmit Enable and Transmit Disable conditions. In addition, this device has a sleep mode function that reduces the quiescent current to 5 mA. The AD8327 is packaged in a low-cost 20-lead TSSOP, operates from a single 5 V supply, and has an operational temperature range of 4 to +85. By Analog Devices, Inc.
AD8327 's PackagesAD8327 's pdf datasheet
AD8327-EVAL
AD8327ARU TSSOP
AD8327ARU-REEL TSSOP
AD8327ARUZ TSSOP
AD8327ARUZ-REEL TSSOP




AD8327 Pinout, Pinouts
AD8327 pinout,Pin out
This is one package pinout of AD8327,If you need more pinouts please download AD8327's pdf datasheet.

AD8327 Application circuits
AD8327 circuits
This is one application circuit of AD8327,If you need more circuits,please download AD8327's pdf datasheet.


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