• AD7298

• EVAL-AD7298SDZ

This document presents the steps to setup an environment for using the EVAL-AD7298SDZ evaluation board together with the Xilinx KC705 FPGA board, the Xilinx Embedded Development Kit (EDK) and the Micrium µC-Probe run-time monitoring tool. Below is presented a picture of the EVAL-AD7298SDZ Evaluation Board with the Xilinx KC705 board.

Below is presented a picture of SDP-B Controller Board with the EVAL-AD7298SDZ Evaluation Board.

The EVAL-AD7298SDZ evaluation board is a member of a growing number of boards available for the SDP. Designed to help customers evaluate performance or quickly prototype new AD7298 circuits and reduce design time, the EVAL-AD7298SDZ evaluation board can operate in single-supply and dual-supply mode and incorporates an internal power supply powered from the USB.

The AD7298 is a 12-bit, high speed, low power, 8-channel successive approximation ADC with internal temperature sensor. The AD7298 offers a programmable sequencer, which enables the selection of a preprogrammed sequence of channels for conversion. The device has an on-chip 2.5 V reference that can be disabled to allow the use of an external reference. The AD7298 includes a high accuracy, band gap, temperature sensor, which is monitored and digitized by the 12-bit ADC to give a resolution of 0.25°C.

• AD7298 Product Info - pricing, samples, datasheet
• EVAL-AD7298SDZ evaluation board user guide
• Xilinx KC705 FPGA board
• Micrium uC-Probe

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.

• Xilinx KC705 FPGA board
• FMC-SDP adapter board
• EVAL-AD7298SDZ evaluation board

• Xilinx ISE 13.4 (Programmer (IMPACT) is sufficient for the demo and is available on Webpack).
• uC-Probe run-time monitoring tool

• Reference Design Files

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

The following figure presents the uC-Probe interface that can be used for monitoring and controlling the operation of the EVAL-AD7298SDZ evaluation board.

The communication with the board is activated / deactivated by toggling the ON/OFF switch. The Activity LED turns green when the communication is active. If the ON/OFF switch is set to ON and the Activity LED is BLACK it means that there is a communication problem with the board. See the Troubleshooting section for indications on how to fix the communication problems.

The thermometer from the left side of the display indicates the chip's temperature as measured by the AD7298 part.

The 8 numeric boxes display the ADC readings for each of the 8 channels of the AD7298.

In case there is a communication problem with the board the follwing actions can be perfomed in order to try to fix the issues:

• Check that the evaluation board is powered as instructed in the board's user guide.
• In uC-Probe refresh the symbols file by right-clicking on the System Browser window and selecting Refresh Symbols.
• If the communication problem persists even after performing the previous steps, restart the uC-Probe application and try to run the interface again.

• AD7298 IIO Multi-Channel ADC Linux Driver