AD738x Reference Platform

Introduction

This document describes the DataStorm DAQ platform connected to an EVAL-AD738x-FMCZ card containing the AD7380/AD7381 device, and includes an example of how to initialize an AD738x device.

The AD738x family are a 16/14/12-bit pin-compatible family of dual simultaneous sampling, high speed, low power, successive approximation register (SAR) analog-to-digital converters (ADCs). The AD7380, AD7381 from AD738x family offer upto 4 MSPS throughputs with 16-bit and 14-bit resolution respectively. The conversion process and data acquisition use standard control inputs allowing simple interfacing to microprocessors or digital signal processors (DSPs). The device is compatible with 1.8 V,2.5 V, and 3.3 V interfaces using the separate logic supply. An integrated on-chip oversampling block improves dynamic range and reduces noise at lower bandwidths. A buffered internal 2.5 V reference is included. Alternatively, an external reference up to 3.3 V can be used. The AD738X feature a resolution boost which enables ADC data resolution to be increased by 2 bit.

Applications

• Motor control position feedback
• Motor control current sense
• Sonar
• Power quality
• Erbium doped fiber amplifier (EDFA) applications
• Data acquisition systems
• I and Q demodulation

Supported Devices

• AD7380
• AD7381
• AD7383
• AD7384
• AD7386
• AD7387
• AD7388

Evaluation Boards

• EVAL-AD738x-FMCZ

A platform is typically comprised of:

• SoC FPGA SOM
• Carrier card with FMC LPC connector
• ADI® FMC converter board

Example designs include:

• FPGA HDL code
• Linux operating system
• Custom IIO Linux device drivers with LibIIO libraries
• IIO Oscilloscope, a Linux user space application
• IIOstream C , a C code example for Linux and remote windows user space application
• Python script example for Linux and other remote user space application
• Matlab toolbox example for other platform user application
• no-OS a bare metal driver with a example application

Each platform is provided with a unique Quick Start Guide, ensuring a good out-of-box experience. Complete example design source code is provided in repositories. This includes source for Linux and FPGA HDL code.

User Guides for the following platforms are available below

• AD738x Platform User Guide

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