基于ADL5350的简介及应用电路设计

字数:3870.页数:21

摘要
简要介绍ADL5350芯片的功能、内部结构、引脚排列及典型的应用电路。ADL5350是一个具有高线性度，宽频带范围的单片集成的上下变频器，芯片由射频放大器中频放大器本机振荡器缓冲发大器组成，具有低损耗，噪声系数为6dbm，高IP3输入典型值为26dbm，高1dbm输出压缩点为17dbm，ADL5350具有高线性输入，低噪声系数不需要高的本机高电源驱动，工作在850/900MHZ有6dbm的变频增益。本机振荡集成放大器可用低电平驱动，大多数典型值只需4dbm。
ADL5350具有高灵敏度和良好的隔离度，适用于蜂窝电话，它的高线性输入，对于隔离度要求高的通信系统来说一个非常理想的混频器，例如：GSM850/900和800MHZ的CDMA200。还适用于点对点无线电链路和射频设备。
关键字：上下变频器  射频  中频  本振  高线性

Abstract
The ADL5350 is a high linearity capable of operating over a broad input frequency range. It is well suited for demanding cellular base-station mixer designs
that require high sensitivity and good blocker immunity. Based on a GaAs pHEMT single-ended mixer architecture, theADL5350 provides excellent input linearity and low noise figure without the need for high power level LO-drive.In 850/900MHz receive applications the ADL5350 provides a
typical conversion loss of only 6dB. The integrated LO amplifierallows a low LO drive level, typically only 4dBm for most applications.The input IP3 is typically greater than 25dBm, with an input compression point of 17dBm. The high input linearity ofthe ADL5350 makes the device an excellent mixer for communications.systems that require high blocker immunity, such as GSM 850/900 and 800MHz CDMA2000. At 2GHz, a slightly greater supply current is required to obtain similar performance.

Key word: Up And Down Converting Mixer   RF  IF    LO  GIign Linearity
目 录
1. ADL5350芯片简介-------------------------------------------------4
2. ADL5350主要电气特性---------------------------------------------5
2.  1  800MHZ时的接收性能------------------------------------------5
2．2 1950 MHZ时的接收性能------------------------------------------6
2．3最大绝对额定值及70M和190M特征频率各特征曲线--------------------6
3. ADL5350芯片封装与引脚功能---------------------------------------14
  3.1 芯片封装-----------------------------------------------------14
  3.2 引脚功能-----------------------------------------------------15
4. ADL5350内部结构与工作原理---------------------------------------15
  4.1 LO缓冲放大器-------------------------------------------------15
  4.2 GC端口-------------------------------------------------------15
  4.3 RF/IF端口----------------------------------------------------15
5. ADL5350应用电路设计---------------------------------------------16
  5.1设计LO 缓冲器工作电感和最低工作电压谐调-----------------------16
  5.2 设计LO输入端口网络调谐---------------------------------------16
  5.3 设计RF和IF滤波网络-------------------------------------------16
6. 评估板----------------------------------------------------------19
  6.1 评估板图示---------------------------------------------------19
  6.2 外部尺寸-----------------------------------------------------19
7. 总结------------------------------------------------------------20