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  1. 齐乐娱乐老虎机官网 >  解决方案 >  [齐乐娱乐老虎机官网] Maxim MAX5871 16位5.9Gsps RF DAC解决方案

[齐乐娱乐老虎机官网] Maxim MAX5871 16位5.9Gsps RF DAC解决方案

关键词:无线通信 蜂窝基站 4G LTE WiMAX 点对点微波链接 GSM/TDMA/CDMA/UMTS 时间:2019-06-11 10:42:28       来源:齐乐娱乐老虎机官网

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 interface can be config­ured for 1, 2, or 4 lanes and supports data rates up to 10Gbps per lane allowing flexibility to optimize the I/O count and speed.

The MAX5871 clock input has a flexible clock interface and accepts a differential sine-wave, or square-wave input clock signal. A bypassable clock multiplying PLL and VCO can be used to generate a high-frequency sam­pling clock. The device outputs a divided reference clock to ensure synchronization of the system clock and DAC clock. In addition, multiple devices can be synchronized using JESD204B Subclass-1.

The MAX5871 uses a differential current-steering architecture and can produce a 0dBm full-scale output signal level with a 50Ω load. Operating from 1.8V and 1.0V power supplies, the device consumes 2.5W at 4.9Gsps. The device is offered in a compact 144-pin, 10mm x 10mm, FCCSP package and is specified for the extended industrial temperature range (-40℃ to +85℃).

MAX5871主要优势和特性:

Simplifies RF Design and Enables New Wireless Communication ArchitecturesEliminates I/Q Imbalance and LO Feedthrough
Enables Multi-Band RF Modulation
Direct RF Synthesis of 600MHz Bandwidth Up to 2.8GHz5.898Gsps DAC Output Update Rate
High-Performance 14-Bit RF DAC Core
Digital Quadrature Modulator and NCO with 1Hz/10Hz/100Hz/1kHz/10kHz Resolution
5x/6x/6.67x/8x/10x/12x/13.33x/16x/20x/24xInterpolation
Integrated Clock Multiplying PLL+VCO
Highly Flexible and Configurable1, 2, or 4-Lane JESD204B Input Data InterfaceSubclass-0 and Subclass-1 Compliant
Up to 10Gbps Per Lane
Reference Clock for System Synchronization
Multiple DAC Synchronization (Subclass-1)
SPI Interface for Device Configuration

MAX5871应用:

Cellular Base-Station Transmitters2.5G/3G - GSM/TDMA/CDMA/UMTS
4G LTE and WiMAX
Multi-Standard and Multi-Band Transmitters
Point-to-Point Microwave Links
Wireless Backhaul

图1.MAX5871简化框图

图2.MAX5871功能框图

评估板MAX5871 EVK

The MAX5871 evaluation kit (EV kit) contains a singleMAX5871 high-performance interpolating and modulating16-bit 5.9Gsps RF DAC that can directly synthesize upto 600MHz of instantaneous bandwidth from DC tofrequencies greater than 2.8GHz. The device is optimizedfor direct RF synthesis of single and multicarrier transmitsignals in wireless communications applications. TheMAX5871 meets spectral mask requirements of a widerange of communication standards, including MC GSM,UMTS, and LTE. The EV Kit provides a complete systemfor evaluating the performance of the MAX5871 and a platform for system development.

The EV kit connects to one FMC connector on the Xilinx®VC707 evaluation kit, allowing the VC707 to communicatewith the MAX5871’s JESD204B serial link interface.

The EV kit includes Windows® 7/8 and Windows XP®-compatible software that provides a simple graphical userinterface (GUI) for configuration of all of the MAX5871registers through the SPI interface, control of the VC707FPGA, and temperature monitoring.

评估板MAX5871 EVK主要特性:

●● Evaluates MAX5871 RF DAC Performance,Capability and Feature Set
●● Single 3.3V Input Voltage Supply
●● Maximum 5.9Gsps Update Rate
●● Direct Interface with Xilinx VC707 Data Source Board
●● Windows 7/8 and Windows XP-Compatible Software
●● On-Board SPI Interface Control for the MAX5871
●● On-Board SMBus™ Interface Control for theMAX6654 Temperature Sensor
●● GUI Controls for VC707 Operation
●● Proven 10-Layer PCB Design
●● Fully Assembled and Tested

图3.评估板MAX5871 EVK和VC707外形图

图4.评估板MAX5871 EVK系统框图

图5.评估板MAX5871 EVK电路图(1)

图6.评估板MAX5871 EVK电路图(2)

图7.评估板MAX5871 EVK电路图(3)

图8.评估板MAX5871 EVK电路图(4)

图9.评估板MAX5871 EVK电路图(5)

图10.评估板MAX5871 EVK电路图(6)

图11.评估板MAX5871 EVK电路图(7)

图12.评估板MAX5871 EVK电路图(8)

图13.评估板MAX5871 EVK PCB设计图(1)

图14.评估板MAX5871 EVK PCB设计图(2)

图15.评估板MAX5871 EVK PCB设计图(3)

图16.评估板MAX5871 EVK PCB设计图(4)

图17.评估板MAX5871 EVK PCB设计图(5)

图18.评估板MAX5871 EVK PCB设计图(6)

图19.评估板MAX5871 EVK PCB设计图(7)

图20.评估板MAX5871 EVK PCB设计图(8)

图21.评估板MAX5871 EVK PCB设计图(9)

图22.评估板MAX5871 EVK PCB设计图(10)

图23.评估板MAX5871 EVK PCB设计图(11)

图24.评估板MAX5871 EVK PCB设计图(12)
详情请见:
https://datasheets.maximintegrated.com/en/ds/MAX5871.pdf
https://datasheets.maximintegrated.com/en/ds/MAX5871EVKIT.pdf
MAX5871.pdf
MAX5871EVKIT.pdf

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