NS LMH6517 RD-179高IF亚取样接收方案
NS公司的RD-179高IF亚取样接收器子系统参考设计SP16160CH1RB采用ADC16DV160 ADC, LMH6517数控可变增益放大器(DVGA)和LMK04031B 精密时钟调理器,主要用在无线基础设备.本文主要介绍了LMH6517数控可变增益放大器(DVGA)主要特性,方框图和IF取样接收器应用电路以及RD-179高IF亚取样接收器子系统参考设计SP16160CH1RB主要特性,方框图和详细电路与所用材料清单.
LMH6517: Low Power, Low Noise, IF and Baseband, Dual 16 bit ADC Driver With Digitally Controlled Gain
The LMH6517 contains two high performance digitally controlled variable gain amplifiers (DVGA). It has been designed for use in narrowband and broadband IF sampling applications.
Typically the LMH6517 drives a high performance ADC in a broad range of mixed signal and digital communication applications such as mobile radio and cellular base stations where automatic gain control (AGC) is required to increase system dynamic range.
Each channel of LMH6517 has an independent digitally controlled attenuator and a high linearity, differential output amplifier. Each block has been optimized for low distortion and maximum system design flexibility. Each channel can be individually disabled for power savings.
..
