AD9265-FMC HDL project

Overview

The AD9265 is a 16-bit, 125 MSPS analog-to-digital converter (ADC). The AD9265 is designed to support communications applications where high performance combined with low cost, small size, and versatility is desired. The ADC core features a multistage, differential pipelined architecture with integrated output error correction logic to provide 16-bit accuracy at 125 MSPS data rates and guarantees no missing codes over the full operating temperature range. The ADC output data format is either parallel 1.8 V CMOS or LVDS (DDR). A data output clock is provided to ensure proper latch timing with receiving logic. The board also provides other options to drive the clock and analog inputs of the ADC.

Supported boards

• EVAL-AD9265

Supported devices

• AD9265

Supported carriers

Evaluation board	Carrier	FMC slot
EVAL-AD9265-FMC-500EBZ	ZC706	FMC LPC
	ZedBoard	FMC LPC

Block design

Block diagram

Clock scheme

There are 3 ways to configure the clock source for AD9265:

• External passive clock (default)

• Optional active clock path using the AD9517

• Optional oscillator

For more details, check AD9265 schematic.

CPU/Memory interconnects addresses

The addresses are dependent on the architecture of the FPGA, having an offset added to the base address from HDL (see more at HDL Architecture).

Check-out the table below to find out the conditions.

Instance	Zynq/Microblaze
axi_ad9265	0x44A00000
axi_ad9265_dma	0x44A30000

SPI connections

SPI type	SPI manager instance	SPI subordinate	CS
PS	SPI 0	AD9517	1

Interrupts

Below are the Programmable Logic interrupts used in this project.

Instance name	HDL	Linux Zynq	Actual Zynq
axi_ad9265_dma	13	57	89

Building the HDL project

The design is built upon ADI’s generic HDL reference design framework. ADI distributes the bit/elf files of these projects as part of the ADI Kuiper Linux. If you want to build the sources, ADI makes them available on the HDL repository. To get the source you must clone the HDL repository.

Then go to the project location (projects/ad9265_fmc/carrier) and run the make command by typing in your command prompt(this example ZC706):

Linux/Cygwin/WSL

user@analog:~$ cd hdl/projects/ad9265_fmc/zc706
user@analog:~/hdl/projects/ad9265_fmc/zc706$ make

A more comprehensive build guide can be found in the Build an HDL project user guide.

Resources

Systems related

Here you can find the quick start guides available for these evaluation boards:

Evaluation board	Zynq-7000
AD9265-FMC	ZC706

Hardware related

• Product datasheets: AD9265

• [Wiki] Evaluating AD9265, user guide

HDL related

• AD9265-FMC HDL project source code

IP name	Source code link	Documentation link
AXI_AD9265	library/axi_ad9265	here
AXI_DMAC	library/axi_dmac	here
AXI_CLKGEN	library/axi_clkgen	here
AXI_HDMI_TX	library/axi_hdmi_tx	here
AXI_SPDIF_TX	library/axi_spdif_tx	—
AXI_I2S_ADI	library/axi_sysid	—
AXI_SYSID	library/axi_sysid	here
SYSID_ROM	library/sysid_rom	here
UTIL_I2C_MIXER	library/util_i2c_mixer	here

Software related

• Linux device tree zynq-zc706-adv7511-ad9265-fmc-125ebz.dts

• Linux driver ad9467.c (used for AD9265-FMC as well)

More information

• ADI HDL User guide

Support

Analog Devices, Inc. will provide limited online support for anyone using the reference design with ADI components via the EngineerZone FPGA reference designs forum.

For questions regarding the ADI Linux device drivers, device trees, etc. from our Linux GitHub repository, the team will offer support on the EngineerZone Linux software drivers forum.

For questions concerning the ADI No-OS drivers, from our No-OS GitHub repository, the team will offer support on the EngineerZone microcontroller No-OS drivers forum.

It should be noted, that the older the tools’ versions and release branches are, the lower the chances to receive support from ADI engineers.