Maxim MAX2062 50MHz-1000MHz双路模数VGA解决方案

Maxim 公司的MAX2062是高度线性的 50MHz-1000MHz双路模/数可变增益放大器（VGA），最大增益19.4dB ，100MHz带宽的增益平坦度为0.34dB,200MHz时的通路隔离为56dB，内置的8位DAC用不来模拟衰减控制，单电源5V工作，具有极好的线性，200MHz的OIP3为41dBm,OIP2为 56dBm,1dB压缩点为19dBm，主要用在IF和RF增益级，温度补偿电路，GSM/EDGE，WCDMA，TD-SCDMA和CDMA2000基站，WiMAXK，LTE和TD-LTE基站以及CPE，无线局部回路和军用系统等。本文介绍了MAX2062主要特性，典型应用电路及所用材料清单。

The MAX2062 high-linearity, dual analog/digital variablegain amplifier (VGA) operates in the 50MHz to 1000MHz frequency range with two independent attenuators in each signal path. Each digital attenuator is controlled as a slave peripheral using either the SPIK-compatible interface, or a 5-bit parallel bus with 31dB total adjustment range in 1dB steps. An added feature allows rapid-fire gain selection among each of the four steps, preprogrammed by the user through the SPI-compatible interface. A separate 2-pin control lets the user quickly access any one of four customized attenuation states without reprogramming the SPI bus. Each analog attenuator is controlled using an external voltage or through the SPI-compatible interface using an on-chip 8-bit DAC.
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