AD411x-AD717x HDL project

Overview

The AD4111 /AD4112 /AD4114 /AD4415/ AD4116 is a low power, low noise, 24-bit, sigma-delta (Σ-Δ) analog-to-digital converter (ADC), high impedance (≥1 MΩ) bipolar, ±10 V voltage inputs, and 0 mA to 20 mA current inputs. The AD4113 differ from device above, in that it is 16-bit resultion. The AD4111 /AD4112 /AD4113 /AD4114 / AD4415 /AD4116 also integrates key analog and digital signal conditioning blocks to configure eight individual setups for each analog input channel in use.

The AD4111 /AD4112 /AD4113 /AD4114 features a maximum output data rate of 31.25 kSPS, AD4115 features a maximum output data rate of 125 kSPS and AD4116 features a maximum output data rate of 62.5 kSPS.

The AD7172-2 /AD7172-4 /AD7173-8 /AD7175-2/ AD7175-8 /AD7176-2 /AD7177-2 is a low noise, low power, multiplexed, Σ-Δ analog-to-digital converter (ADC) for low bandwidth input signals. The AD7172-2 /AD7172-4 /AD7173-8 /AD7175-2 / AD7175-8 /AD7176-2 /AD7177-2 integrates key analog and digital signal conditioning blocks to allow users to configure an individual setup for each analog input channel in use.

The AD7172-2 /AD7172-4 /AD7173-8 features a maximum output data rate of 31.25 kSPS, AD7175-2/ AD7175-8 /AD7176-2 features a maximum output data rate of 250 kSPS and AD7177-2 features a maximum output data rate of 10 kSPS.

The digital filter allows flexible settings, including simultaneous 50 Hz and 60 Hz rejection at a 27.27 SPS output data rate. The user can select different filter settings depending on the requirements of each channel in the application.

This project has a SPI Engine instance to control and acquire data from the AD411x/AD717x precision ADC. This instance provides support for capturing continuous samples at the maximum sample rate.

Supported boards

• EVAL-AD4111-ARDZ

• EVAL-AD4112-ARDZ

• EVAL-AD4114-SDZ

• EVAL-AD4115-SDZ

• EVAL-AD4116-ASDZ

• EVAL-AD7173-8ARDZ

• EVAL-AD7175-8ARDZ

Supported devices

• AD4111

• AD4112

• AD4113

• AD4114

• AD4115

• AD4116

• AD7172-2

• AD7172-4

• AD7173-8

• AD7175-2

• AD7175-8

• AD7176-2

• AD7177-2

Supported carriers

• DE10-Nano Arduino shield connector

Block design

Block diagram

The data path and clock domains are depicted in the below diagram:

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).

Instance	Address
axi_dmac_0	0x0002_0000
axi_spi_engine_0	0x0003_0000
trigger_generator	0x0004_0000

I2C connections

I2C type	I2C manager instance	Alias	Address	I2C subordinate
PS**	i2c1	sys_hps_i2c1	—	—

SPI connections

SPI type	SPI manager instance	SPI subordinate	CS
PL	axi_spi_engine	ad411x_ad717x	0

GPIOs

The Software GPIO number is calculated as follows:

• DE10-Nano: the offset is 32

GPIO signal	Direction	HDL GPIO EMIO	Software GPIO
	(from FPGA view)		DE10-Nano
spi_miso	INPUT	34	2
error	INPUT	33	1
sync_error	INPUT	32	0

Interrupts

Below are the Programmable Logic interrupts used in this project.

Instance name	HDL	Linux DE10-Nano	Actual DE10-Nano
axi_spi_engine_0	5	45	77
axi_dmac_0	4	44	76

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, and then build the project as follows:

Linux/Cygwin/WSL

user@analog:~$ cd hdl/projects/ad411x_ad717x/de10nano
user@analog:~/hdl/projects/ad411x_ad717x/de10nano$ make

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

Resources

Hardware related

• Product datasheets:

  • AD4170-4

  • AD4111

  • AD4112

  • AD4113

  • AD4114

  • AD4115

  • AD4116

  • AD7172-2

  • AD7172-4

  • AD7173-8

  • AD7175-2

  • AD7175-8

  • AD7176-2

  • AD7177-2

HDL related

• AD411x_AD717x HDL project source code

IP name	Source code link	Documentation link
AXI_DMAC	library/axi_dmac	here
AXI_HDMI_TX	library/axi_hdmi_tx	here
AXI_PWM_GEN	library/axi_pwm_gen	[Wiki]
AXI_SYSID	library/axi_sysid	here
AXI_SPI_ENGINE	library/spi_engine/axi_spi_engine	here
SPI_ENGINE_EXECUTION	library/spi_engine/spi_engine_execution	here
SPI_ENGINE_INTERCONNECT	library/spi_engine/spi_engine_interconnect	here
SPI_ENGINE_OFFLOAD	library/spi_engine/spi_engine_offload	here
SYSID_ROM	library/sysid_rom	here
UTIL_SIGMA_DELTA_SPI	library/util_sigma_delta_spi	[Wiki]

• SPI Engine Framework documentation

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.