ADI AD92135G多频段无线通信RF转换器解决方案

电子工程师 2019-08-04 3394

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描述

ADI公司的AD9213是12位10.25 GSPS RF模拟数转换器（ADC），输入带宽6.5GHz，支持需要宽瞬态带宽和低代码误差速率（CER）的高动态范围频率和时域应用.AD9213具有16路JESD204B接口，以支持它的最大带宽功能。它具有业界一流的动态范围和线性信性能而功耗仅为5.1W（10GSPS取样），基于交错管道架构，具有专有校准和随机化技术，它能抑制交错杂散信号进固有噪声电平。噪音频谱密度为154 dBFS/Hz， SFDR为70 dBc （1 GHz， −1 dBFS）。器件集成的输入缓冲器输入带宽为6.5GHz，RIN=50Ω时1.4Vp-p满刻度输入，集成了数字下变换器（DDC），主要用在4G/5G 多频段无线通信基站，多标准生产测试系统和防御电子产品等 GHz 带宽应用。本文介绍了AD9213主要特性，功能框图，数字下变换器（DDC）框图以及高速评估板ADS8-V1EBZ主要特性，电路图，材料清单和PCB设计图。

The AD9213 is a single 12-bit， 10.25 GSPS， RF analog-to-digital converter （ADC） with a 6.5 GHz input bandwidth. The AD9213 has been optimized to support high dynamic range frequency and time domain applications requiring wide instantaneous bandwidth and low code error rates （CER）。 The AD9213 features a 16-lane JESD204B interface to support its maximum bandwidth capability.

The AD9213 achieves industry leading dynamic range and linearity performance while consuming only 5 W. Based on an interleaved pipeline architecture， the AD9213 features a proprietary calibration and randomization technique that suppresses interleaving spurious artifacts into its noise floor. The excellent linearity performance of the AD9213 is preserved by a combination of on-chip dithering and calibration resulting in excellent spurious free performance over a wide range of input signal conditions.

Applications requiring less instantaneous bandwidth can benefit from the on-chip digital signal processing （DSP） capability of the AD9213 that reduces the output data rate along with the number of JESD204b lanes required to support it. The DSP path includes a digital downconverter （DDC） with a 48-bit， numerically controlled oscillator （NCO） followed by an I and Q digital decimator stage allowing for selectable decimation rates that are factors of two or three. For fast frequency hopping applications， the AD9213 NCO supports up to 16-profile settings with separate trigger input allowing for wide surveillance frequency coverage but at a reduced JESD204B lane count.

The AD9213 also supports sample accurate multichip synchronization that also includes synchronization of the NCOs. The AD9213 will be offered in a 192 flip-chip ball grid array （FcBGA） package. The AD9213 is specified over a junction temperature range of −10℃ to +115℃。

AD9213主要特性：

High instantaneous dynamic range

Noise spectral density 154 dBFS/Hz

SFDR 70 dBc （1 GHz， −1 dBFS）

Low power consumption： 5.1 W at 10 GSPS

Integrated input buffer （6.5 GHz input bandwidth）

1.4 V p-p full-scale input with RIN = 50 Ω

Overvoltage protection

16-lane JESD204B output （up to 16 Gbps line rate）

Multichip sync capable with 1 sample accuracy

DDC NCO synchronization included

Fast overrange detection for efficient AGC

Integrated DDC

Selectable decimation factors

16-profile settings for fast frequency hopping

Optional on-chip PLL clock multiplier

On-chip temperature sensor

On-chip negative voltage generators

Low CER 《1e−16

12 mm × 12 mm BGA

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图1.AD9213功能框图

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图2.AD9213数字下变换器（DDC）框图

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图3. AD9213评估板和ADS8-V1EBZ数据捕获板连接图

高速评估板ADS8-V1EBZ

The ADS8-V1 Evaluation Board was developed to support the evaluation of Analog Devices High Speed Data Converters with JESD204B bit rates up to 16Gbps. This Wiki site provides a high level overview of the platform. In addition， each use-case of the board has its own section （e.g. Using the ADS8-V1 for High Speed A/D Converter Evaluation）。 The ADS8-V1 is intended to be used only with specified Analog Devices Evaluation Boards. The ADS8-V1 is not intended to be used as a general purpose development platform， and no support is available for standalone operation. The ADS8-V1 may contain hardware features not fully productized or supported by our default customer evaluation configurations. Please refer to Xilinx and its approved distributors for general purpose FPGA Development Kits.

高速评估板ADS8-V1EBZ主要特性：

1. Xilinx KintexUltrascale XCKU040-3FFVA1156E FPGA.

2. One （1） FMC+ connector.

3. Twenty （20） 16Gbps transceivers supported by one （1） FMC+ connector.

4. DDR4 SDRAM.

5. Simple USB 3.0 port interface.

图4.高速评估板ADS8-V1EBZ外形图（顶面）

图5.高速评估板ADS8-V1EBZ外形图（底面）

When connected to a specified Analog Devices high speed adc evaluation board， the ADS8-V1 works as a data acquistion board. Designed to support the highest speed JESD204B A/D Converters， the FPGA on the ADS8-V1 acts as the data receiver， while the ADC is the data transmitter. A typical test setup is shown below.

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