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This version (12 Jan 2021 13:17) was approved by Dan Hotoleanu.

AD9656 HDL Reference Design

Introduction

The AD9656 is a quad 16-bit, 125MSPS analog-to-digital converter (ADC) with an on-chip sample and hold circuit designed for low cost, low power, small size, and ease of use. The AD9656EBZ board is build around the AD9656 chip and it pairs with a carrier board through a FMC connector. The ADC chip uses the JESD204B protocol to transfer the data to the carrier board. The SPI protocol is used by the carrier board to configure the parameters from the register file of the ADC and the two clock chips.

Supported Devices

Supported Carriers

Until now our recommended plaform is the Zynq based system:

Functional Overview

The reference design is a processor based ARM embedded system. A functional block diagram of the system is given below for the Xilinx FPGAs. The cores are programmable through an AXI-lite interface. The data path consists of a DMA interface for the receive path.

AD9656 block diagram

Xilinx block diagram

Digital Interface

The digital interface consists of 4 receive lanes running at 2.5Gbps. The transceivers then interfaces to the cores at 128bits@62.5MHz. The data is received based on the configuration (programmable) from separate receive chains.

ADC Interface

The ADC data is sent to the DDR via DMA. The core also supports PN monitoring at the sample level. This is different from the JESD204B specific PN sequence.

Control and SPI

The device control and monitor signals are interfaced to a GPIO module. The SPI signals are controlled by a separate AXI based SPI core.

Building the HDL

ADI does not distribute the bit/elf files of these projects so they must be built from the sources available here. To get the source you must clone the HDL repository. Then go to the /projects/ad9656_fmc/zcu102 location and run the make command by typing in your command prompt:

Linux

dhotolea@analog:~$ cd hdl/projects/ad9656_fmc/zcu102
dhotolea@analog:~/hdl/projects/ad9656_fmc/zcu102$ make

A more comprehensive build guide can be found in the HDL User Guide.

More information

Download

Projects list and dependencies for master

AD40XXFMC

AD469XFMC

AD5758SDZ

AD5766SDZ

AD6676EVB

AD7134FMC

AD738xFMC

AD7405FMC

AD7616SDZ

AD77681EVB

AD7768EVB

AD9081FMCAEBZ

AD9082FMCAEBZ

AD9083EVB

AD9208DUALEBZ

AD9265FMC

AD9434FMC

AD9467FMC

AD9656FMC

AD9739AFMC

ADFMCLIDAR1EBZ

ADAQ7980SDZ

ADRV9001

ADRV9008/9

ADRV9371

ADV7511OnBoard

ADV7513OnBoard

Hardware Project Carriers Resource Utilization Library Cores
ADV7513 adv7513 de10nano NA axi_dmac
axi_hdmi_tx
util_axis_fifo

ARRadio

Hardware Project Carriers Resource Utilization Library Cores
ARRadio arradio c5soc NA axi_ad9361
axi_dmac
axi_sysid
sysid_rom
util_axis_fifo
util_cdc
util_cpack2
util_rfifo
util_upack2

CN0363

CN0501

Hardware Project Carriers Resource Utilization Library Cores
CN0501 cn0501 coraz7s cn0501_coraz7s axi_dmac
axi_generic_adc
axi_sysid
sysid_rom
util_axis_fifo
util_cdc

CN0506MII

CN0506RGMII

CN0506RMII

CN0540

DACFMCEBZ

FMCDAQ2

FMCDAQ3

FMCADC2/FMCADC3

FMCADC5

FMCJESDADC1

FMCOMMS11

FMCOMMS2/FMCOMMS3/FMCOMMS4

FMCOMMS5

FMCOMMS8

FMCIMAGEONG

Help & Support

13 Feb 2015 18:57 · rejeesh kutty

Help & Support

13 Feb 2015 18:57 · rejeesh kutty
resources/eval/user-guides/ad9656/reference_hdl.txt · Last modified: 07 Jan 2021 12:40 by Dan Hotoleanu