高增益矢量乘法器

字数:7500,页数:32

摘要
 
   MAX2045/MAX2046/MAX2047低成本全集成矢量乘法器用来改变RF信号的幅值与相位。各款器件分别为UMTS (MAX2045)、DCS/PCS (MAX2046)或蜂窝/GSM (MAX2047)频段而优化。这些器件都具有差分RF输入与输出。
MAX2045/MAX2046/MAX2047通过差分I/Q放大器提供矢量调节。I/Q放大器可以与电压和/或电流型数模转换器(DAC)接口。电压输入端针对与电压模式DAC接口而设计，而电流输入端针对与电流模式DAC接口而设计。对于使用单端电压型DAC的应用，还准备了内部2.5V参考电压。这些器件适用于CDMA、多载波CDMA、cdma2000?，以及WB-CDMA等应用。
   MAX2045/MAX2046/MAX2047工作在4.75V至5.25V单电源下。所有器件都采用紧凑的5mm x 5mm，32引脚薄型QFN底盘裸露的封装。

The MAX2045/MAX2046/MAX2047 low-cost, fully integrated vector multipliers alter the magnitude and phase of an RF signal. Each device is optimized for the UMTS (MAX2045), DCS/PCS (MAX2046), or cellular/GSM (MAX2047) frequency bands. These devices feature differential RF inputs and outputs.
The MAX2045/MAX2046/MAX2047 provide vector adjustment through the differential I/Q amplifiers. The I/Q amplifiers can interface with voltage and/or current digital-to-analog converters (DACs). The voltage inputs are designed to interface to a voltage-mode DAC, while the current inputs are designed to interface to a currentmode DAC. An internal 2.5V reference voltage is provided for applications using singleended voltage DACs
.The MAX2045/MAX2046/MAX2047 operate from a 4.75V to 5.25V single supply. All devices are offered in a compact 5mm   5mm, 32-lead thin QFN exposed-paddle packages.

关键词： 副值       相位      矢量 
    频带范围      差动

KEYWORDS:    magnitude      phase     vector   
  Frequency- bands     differential

目    录
1、设计要点........................................................................4
2、电路工作的绝对额定值............................................................5
3、芯片引脚配置方框图..............................................................6
4、电路的电气特性..................................................................7
   4.1、直流电压特性...............................................................7
   4.2、交流电压特性...............................................................7
   4.3、MAX2045的电特性............................................................8
   4.4、MAX2046的电特性............................................................9
   4.5、MAX2047的电特性...........................................................11
5、各电路的典型使用特性...........................................................13
   5.1、MAX2045的典型使用特性.....................................................13
   5.2、MAX2046的典型使用特性.....................................................18
   5.3、MAX2047的典型使用特性.....................................................23
6、芯片引脚功能...................................................................27
7、内部结构与工作原理.............................................................28
   7.1、详细说明..................................................................28
   7.2、射频电压引入..............................................................29
   7.3、I/O口输入.................................................................29
8、电路应用须知...................................................................30
   8.1、芯片内的基准电压..........................................................30
   8.2、射频单端电路..............................................................31
   8.3、偏压电阻..................................................................31
   8.4、开关速度..................................................................31
   8.5、版图布局..................................................................31
   8.6、电源供给支路..............................................................32
9、封撞消息.......................................................................32
10、参考文献......................................................................32
11、结论..........................................................................32