ADI AD9164高性能16位DAC和DDS解决方案

ADI公司的AD9164是高性能16位数模转换器(DAC)和直接数字频率合成器(DDS)，支持最高达6 GSPS更新速率.DAC内核基于一个四通道开关结构配合2倍插值滤波器，使DAC的有效更新速率在某些模式下高达12 GSPS;而DDS由一组32个32位数控振荡器(NCO)组成,各带相位累加器,能使军用和商用雷达设计人员实现高分辨率雷达成像,同时减少解决方案器件数量,频率范围从音频到6 GHz,主要用在宽带通信系统,DOCSIS 3.1电缆调制解调器终端系统(CMTS)/视频点播(VOD)/边沿正交幅度调制(EQAM),无线通信基础设施以及W-CDMA, LTE, LTE-A和点对点.本文介绍了AD9164产品亮点和主要特性,功能框图,以及评估板AD916x-FMCx-EBZ EVB主要特性,框图,电路图和材料清单.
The AD91641 is a high performance, 16-bit digital-to-analog converter (DAC) and direct digital synthesizer (DDS) that supports update rates to 6 GSPS. The DAC core is based on a quad-switch architecture coupled with a 2× interpolator filter that enables an effective DAC update rate of up to 12 GSPS in some modes. The high dynamic range and bandwidth makes these DACs ideally suited for the most demanding high speed radio frequency (RF) DAC applications.
The DDS consists of a bank of 32, 32-bit numerically controlled oscillators (NCOs), each with its own phase accumulator. When combined with a 100 MHz serial peripheral interface (SPI) and fast hop modes, phase coherent fast frequency hopping (FFH) is enabled, with several modes to support multiple applications.
In baseband mode, wide analog bandwidth capability combines with high dynamic range to support DOCSIS 3.1 cable infrastruc-ture compliance from the minimum of one carrier up to the full maximum spectrum of 1.791 GHz of signal bandwidth. A 2× interpolator filter (FIR85) enables the AD9164 to be configured for lower data rates and converter clocking to reduce the overall system power and ease the filtering requirements. In Mix-Mode™ operation, the AD9164 can reconstruct RF carriers in the second and third Nyquist zones up to 7.5 GHz while still maintaining exceptional dynamic range. The output current can be programmed fro...