Features and Benefits
- Supports DOCSIS 2.0 and EuroDOCSIS specifications for reverse path transmission systems
- Gain programmable in 1 dB steps over a 59 dB range
- Low distortion at 61 dBmV output
- −59 dBc SFDR at 21 MHz
- −54 dBc SFDR at 65 MHz
- Output noise level at minimum gain 1.3 nV/√Hz
- Maintains 75 Ω output impedance in transmit-enable and transmit-disable condition
- Upper bandwidth of 100 MHz (full gain range)
- 3.3 V supply operation
- Supports SPI® interfaces
The AD8324 is a low cost amplifier designed for coaxial line driving. The features and specifications make the AD8324 ideally suited for DOCSIS® 2.0 and EuroDOCSIS applications. The gain of the AD8324 is digitally controlled. An 8-bit serial word determines the desired output gain over a 59 dB range, resulting in gain changes of 1 dB/LSB.
The AD8324 accepts a differential or single-ended input signal. The output is specified for driving a 75 Ω load through a 1:1 transformer.
Distortion performance of –54 dBc is achieved with an output level up to 61 dBmV at 65 MHz bandwidth. This device has a sleep mode function that reduces the quiescent current to 30 μA and a full power-down function that reduces power-down current to 2.5 mA.
The AD8324 is packaged in a low cost, 20-lead LFCSP and a 20-lead QSOP. The AD8324 operates from a single 3.3 V supply.
- DOCSIS 2.0 and EuroDOCSIS cable modems
- CATV set-top boxes
- CATV telephony modems
- Coaxial and twisted pair line drivers
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.