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AD7982 FMC-SDP Interposer & Evaluation

Board / Xilinx KC705 Reference Design

Supported Devices

Evaluation Boards

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For component evaluation and performance purposes, as opposed to quick prototyping, the user is

directed to use the part evaluation setup. This consists of:

1. A controller board like the SDP-B ( EVAL-SDP-CS1Z)

2. The component SDP compatible product evaluation board

3. Corresponding PC software ( shipped with the product evaluation board)

The SDP-B controller board is part of Analog Devices System Demonstration Platform (SDP). It

The AD7982 is an 18-bit, successive approximation, analog-to-digital converter (ADC) that operates

from a single power supply, VDD. It contains a low power, high speed, 18-bit sampling ADC and a

versatile serial interface port. On the CNV rising edge, the AD7982 samples the voltage difference

between the IN+ and IN− pins. The voltages on these pins usually swing in opposite phases between

0 V and VREF. The reference voltage, REF, is applied externally and can be set independent of the

supply voltage, VDD. Its power scales linearly with throughput. The SPI-compatible serial interface

also features the ability, using the SDI input, to daisy-chain several ADCs on a single 3-wire bus and

provides an optional busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic, using the

separate VIO supply.

The EVAL-AD7982SDZ evaluation board is a member of a growing number of boards available for the

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AD7982 Product Info - pricing, samples, datasheet

EVAL-AD7982SDZ evaluation board user guide

Xilinx KC705 FPGA board

Getting Started

The first objective is to ensure that you have all of the items needed and to install the software tools

so that you are ready to create and run the evaluation project.

Required Hardware

Xilinx KC705 FPGA board

FMC-SDP adapter board

Reference Design Files

The following table presents a short description the reference design archive contents.

Folder Description

Bit Contains the KC705 configuration file that can be used to program the system for quick

DataCapture Contains the script used to read data from the ADC and save it into a file on the PC.

Hdl Contains the HDL driver for the AD7982 ADC.

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Before connecting the ADI evaluation board to the Xilinx KC705 make sure that the

VADJ_FPGA voltage of the KC705 is set to 3.3V. For more details on how to change the

setting for VADJ_FPGA visit the Xilinx KC705 product page.

Use the FMC-SDP interposer to connect the ADI evaluation board to the Xilinx KC705 board on the

FMC LPC connector.

Connect the JTAG and UART cables to the KC705 and power up the FPGA board.

Start IMPACT, and double click “Boundary Scan”. Right click and select Initialize Chain. The program

should recognize the Kintex 7 device (see screenshot below).

Program the KC705 FPGA using the “Bit/download.bit” file provided in the reference design archive.

reference design .zip file. Every time the script is run a new batch of 8192 samples are read from the

ADC at the ADC's maximum sampling rate and saved into the Acquisition.csv file located in the same

folder as the data capture script. On the UART terminal messages will be displayed to show the status

of the program running on the FPGA as shown in the picture below.

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The first time the data capture script is run it is possible that an error will occur while the

script is trying to connect to the system. Just run the script again and the error shouldn't

appear anymore.

More information

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