基于MAX2106 芯片简介及应用电路设计

字数:6266,页数:20

基于MAX2106芯片简介及应用电路的设计

摘   要

简要介绍了MAX2106芯片的功能、内部结构及引脚排列。MAX2106是低成本、直接变频调谐集成电路芯片，应用于数字式直接卫星广播（DBS）电视接收机顶箱部件。与MAX2104相比，具有更大的系统功能。芯片集成了具有增益调节的低噪声放大器（LNA）, I/Ｑ下变频混合器，低通滤波器，本机振荡（LO）90度移相缓冲网络和锁相环（PLL）。该芯片内的本机振荡器只需外部变抗器电平调节箱调谐本机振荡，使其输出驱动内部正交发生器，其内部集成缓冲放大器驱动芯片电路。
MAX2106主要应用于美国决策支持系统顶端接收器、欧洲DVB适应体系、单元基地电台、内部无线回路、宽带系统、LMDS、专业接收器、微小卫星终端（VSAT）、微波链路等高端技术场合。
关键字：宽带I/Q下变频器    I/Ｑ下变频混合器
积层陶磁电容器   预定标器　　充电泵
Abstract

It briefly introduced the MAX2106 function, internal structure and pin array . The MAX2106 low-cost, direct-conversion tuner IC is designed for use in digital direct-broadcast satellite (DBS) television set-top box units and is a pin-for-pin upgrade for the MAX2104. The MAX2106 directly tunes L-band signals to base-band using a broadband I/Q down-converter. The IC includes a low-noise amplifier (LNA) with gain control, I and Q down-converting mixers, low-pass filters with gain and frequency control, a local oscillator (LO) buffer with a 90° quadrature network, and a charge-pump based phase-locked loop (PLL) for frequency control. The MAX2106 has an on-chip LO, requiring only an external varactor-tuned LC tank for operation. The LO’s output drives the internal quadrature agenerator and has a buffer amplifier to drive off-chip circuitry.
The MAX2106 is mostly apply for U.S. DSS Set-Top Receivers, European DVB-Compliant Systems , Cellular Base Stations, Wireless Local Loop, Broadband Systems, LMDS, Professional Receivers, VSAT, Microwave Links and so on.

Keywords:  Broadband I/Q Down-converter  I and Q down-converting mixers 
Ceramic chip capacitor   Prescaler   Charge-pump

目   录

1．MAX2106芯片简介 ...................................................................2
2．MAX2106芯片封装与引脚功能..........................................................3
2．1  芯片封装........................................................................3
2．2  引脚功能表......................................................................3
2．3  封装信息图 .....................................................................5
3.  MAX2106内部结构与工作原理 ........................................................7
4.  MAX2106的主要电气特性.............................................................8
4．1  直流电电源特性..................................................................8
4．2  交流电电源特性..................................................................9
4．3  绝对最大额定值..................................................................12
5．MAX2106应用电路的设计..............................................................13
6．总结 .............................................................................13
参考文献..............................................................................14