AD4110 HDL project

Overview

The AD4110-1 is a complete, single-channel, universal input analog-to-digital front end for industrial process control systems where sensor type flexibility is required.

The high voltage input is fully software configurable for current or voltage ranges and allow direct interface to all standard industrial analog signal sources such as, ±20 mA, ±4 mA to ±20 mA, ±10 V, and all thermocouple types. Field power can be supplied for loop powered current output sensors. A range of excitation current sources for RTD sensors and other resistive sensors are included. The integrated programmable gain amplifier, PGA, offers sixteen gain settings from 0.2 to 24.

The high voltage input can be programmed to power up in either voltage or current mode. When programmed to current mode, the unique input circuit architecture provides a path for the loop current even in the absence of the system module power supply.

The AD4110-1 provides internal front-end diagnostic functions to indicate overvoltage, undervoltage, open wire, overcurrent and overtemperature conditions. The high voltage input is overcurrent limited and overvoltage protected up to ±35 V.

The AD4110-1 incorporates a 24-bit sigma delta analog to digital converter offering conversion rates from 5 SPS to 125 kSPS with simultaneous 50 Hz and 60 Hz noise rejection.

Applications:

• Process control and industrial automation

• Remote and distributed control systems

• Instrumentation and measurement

• Sensor and data acquisition

Supported boards

• EVAL-AD4110-1

Supported devices

• AD4110-1

Supported carriers

• ZedBoard on PMODs

Block design

Block diagram

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

Jumper setup

Jumper/Solder link	Default Position	Description
SL1	A	Connects the 5 V output of the ADP7102 to the DVDD rail to supply the IOVDD pins of the AD4110-1
SL2	A	Valid SDP connection to evaluation board LED
SL3	A	Connects J8 AINCOM to Pin 26 (AINCOM(LV)) of the AD4110-1
SL4	A	Connects GND to Pin 28 (AIN2(LV)) of the AD4110-1
SL5	A	Connects VOUT of the TMP36 temperature sensor to Pin 27 (AIN1(LV)) of the AD4110-1

Hardware setup

Signal	AD4110 Testpoint	ZedBoard PMOD
CS	CS	JA1
DIN(MOSI)	DIN	JA2
DOUT/RDY	DOUT	JA3
SCLK	SCLK	JA10
pmod_gpio[0]	DOUT	JB1
3V3	SDP+3.3V(C43+)	JA6
GND	GND(C43-)	JA5

The evaluation board is powered by the 3.3V voltage from the ZedBoard’s PMOD (Green color of LED1 indicates valid SDP connection to the evaluation board). Also, the evaluation board is powered by a ±15V power supply connected to J14 (LED3 indicates a 5V supply to the evaluation board).

GPIOs

The Software GPIO number is calculated as follows:

• Zynq-7000: if PS7 is used, then the offset is 54

GPIO signal	Direction	HDL GPIO EMIO	Software GPIO
	(from FPGA view)		Zynq-7000
pmod_gpio[3:0]	INOUT	35:32	89:86

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

~$

cd hdl/projects/ad4110/zed

~/hdl/projects/ad4110/zed$

make

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

Resources

Hardware related

• Product datasheet: AD4110-1

• UG-1203: EVAL-AD4110-1SDZ Board User Guide

HDL related

• AD4110 HDL project source code

IP name	Source code link	Documentation link
AXI_CLKGEN	library/axi_clkgen	AXI CLK Generator
AXI_DMAC	library/axi_dmac	AXI DMAC
AXI_HDMI_TX	library/axi_hdmi_tx	AXI HDMI TX
AXI_I2S_ADI	library/axi_i2s_adi	—
AXI_SPDIF_TX	library/axi_spdif_tx	—
AXI_SYSID	library/axi_sysid	AXI System ID
AXI_SYSID_ROM	library/sysid_rom	AXI System ID
UTIL_I2C_MIXER	library/util_i2c_mixer	—

Software related

• AD4110 No-OS project source code

• AD4110 No-OS Driver source code

• AD4110 No-OS Driver documentation

• AD4110 IIO Application

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.