AD AD8321是一款低成本、数字控制式可变增益放大器，并针对同轴线路驱动应用进行了优化，如根据DOCSIS*(上行)标准设计的电缆调制解调器等。所需输出增益由8比特串行字决定，输出增益范围为53.4 dB，增益变化为0.75 dB/LSB。
AD8321提供低成本的20引脚SOIC封装，采用+9 V单电源供电，工作温度范围为-40℃至+85°C。
本产品提供评估板，请用以下器件编号订购：AD8321-EVAL。评估板的原理图和布局参见产品数据手册。
特点和优势
线性dB增益响应，增益范围：>53 dB
驱动低失真(>11 dBm)信号至75 Ω负载中：SFDR：–53 dBc (42 MHz)
极低输出噪声电平
在上电和关断情况下保持75 Ω恒定输出阻抗
无需线路变压器
上行带宽：235 MHz(最小增益)
9 V单电源供电
省电功能
支持SPI接口
低成本
FEATURES
Linear in dB Gain Response Over >53 dB Range
Drives Low Distortion >11 dBm Signal into 75 � Load:
–53 dBc SFDR at 42 MHz
Very Low Output Noise Level
Maintains Constant 75 � Output Impedance
Power-Up and Power-Down Condition
No Line Transformer Required VIN+
Upper Bandwidth: 235 MHz (Min Gain) VIN–
9V Single Supply Operation
Power-Down Functionality
Supports SPI Interface
Low Cost
AD8321 功能框图
**注意 & Noted:
Because of wholesale price is different from sample price, our website can not state. Please send your required part number via email to Sales@hkmjd.com or add our skype id mjdccm898 for online talking.As well as welcome you call us : 0755-83957301 We will send offer for you; Sometimes manufacturer's price is unstable, so we don't adjust price in time. if you feel price is a little high for you, just feel free to contact us for consultation. Thank you for your support ！
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