DESCRIPTION

The AD8321 is a low cost digitally controlled variable gain amplifier optimized for coaxial line driving applications such as cable modems that are designed to the DOCSIS* (upstream) standard. An 8-bit serial word determines the desired output gain over a 53.4 dB range, resulting in gain changes of 0.75 dB/LSB.

FEATURES

Linear in dB Gain Response Over >53 dB Range

Drives Low Distortion >11 dBm Signal into 75 Ω Load:

–53 dBc SFDR at 42 MHz

Very Low Output Noise Level

Maintains Constant 75 Ω Output Impedance

Power-Up and Power-Down Condition

No Line Transformer Required

Upper Bandwidth: 235 MHz (Min Gain)

9 V Single Supply Operation

Power-Down Functionality

Supports SPI Interface

Low Cost

APPLICATIONS

Gain Programmable Line Driver

HFC High Speed Data Modems

Interactive CATV Set-Top Boxes

CATV Plant Test Equipment

General Purpose IF Variable Gain Block

AD8321ARZ屬于集成電路（IC） > 驅(qū)動器，接收器，收發(fā)器。亞德諾半導體技術(shù)有限公司制造生產(chǎn)的AD8321ARZ驅(qū)動器，接收器，收發(fā)器該系列產(chǎn)品的主要功能是提供必需的硬件資源，以通過延長電纜或印制線進行通信。確切的功能會因所采用的通信協(xié)議而異，可能包括諸如瞬態(tài)抑制之類的功能，這些功能對于通信用途可能并非絕對必要，但對于可能的使用環(huán)境卻是明智之選。