Maxim MAX5871 16位5．9Gsps RF DAC解决方案

Maxim公司的MAX5871是高性能内插和调制的16位5.9Gsps RF DAC,能从DC带大于2.8GHz的频率直接合成高达600MHz瞬时带宽.器件在无线通信应用中具有多种标准和多频段发送器.器件满足特殊任务的要求包括多载波GSM,UMTS和LTE.MAX5871集成了内插滤波器,数字正交调制器,数控振荡器(NCO),时钟乘法PLL+VCO和14位RF DAC核.用户可配置的5x,6x,6.67x,8x,10x,12x, 13.33x,16x,20x或24x线性相位内插滤波器简化了重构滤波,同时增强了通带动态性能,降低了FPGA/ASIC的输入数据带宽要求.MAX5871通过四路JESD204B SerDes数据输入接口接收16位输入数据.每路支持数据速率高达10Gbps,从而灵活优化I/O数量和速度.器件采用差分电流导向架构,可在50Ω产生0dBm满刻度输出信号电平,工作电压1.8V和1.0V,在4.9Gsps时消耗2.5W,工作温度-40℃到+85℃,主要用在蜂窝基站发送器2.5G/3G -GSM/TDMA/CDMA/UMTS,4G LTE和 WiMAX,多标准和多波段发送器,点对点微波链接和无线回程线路.本文介绍了MAX5871主要优势和特性,简化框图和功能框图,以及评估板MAX5871 EVK主要特性,系统框图和电路图与PCB设计图.
The MAX5871 high-performance interpolating and modulating 16-bit 5.9Gsps RF DAC can directly synthesize up to 600MHz of instantaneous bandwidth from DC to frequencies greater than 2.8GHz. The device enables multi-standard and multi-band transmitters in wireless communications applications. The device meets spectral mask requirements for a broad set of communication standards including multicarrier GSM, UMTS, and LTE.
The device integrates interpolation filters, a digital quadrature modulator, a numerically controlled oscillator (NCO), clock multiplying PLL+VCO and a 14-bit RF DAC core. The user-configurable 5x, 6x, 6.67x, 8x, 10x, 12x, 13.33x, 16x, 20x or 24x, linear phase interpolation filters sim­plify reconstruction filtering, while enhancing passband dynamic performance, and reduce the input data band­width required from an FPGA/ASIC. The NCO allows for fully agile modulation of the input baseband signal for direct RF synthesis.
The MAX5871 accepts 16-bit input data via a four-lane JESD204B SerDes data input interface that is Subclass-0 and Subclass-1 compliant. The interf...