AD7768 Reference Platform - ArrowElectronics/data-storm-daq GitHub Wiki

Introduction

This document describes the DataStorm DAQ Platform when connected to an EVAL-7768FMCZ board containing the AD7768 device, and includes an example of how to initialize it.

The AD7768 is an 8-channel simultaneous sampling sigma-delta () ADC, with a sigma-delta modulator and digital filter per channel, enabling synchronized sampling of AC and DC signals. The AD7768 has three modes: fast mode (256 kSPS maximum, 110.8 kHz input bandwidth, 51.5 mW per channel), median mode (128 kSPS maximum, 55.4 kHz input bandwidth, 27.5 mW per channel) and low power mode (32 kSPS maximum, 13.8 kHz input bandwidth, 9.375 mW per channel). It offers extensive digital filtering capabilities, such as a wideband, low ±0.005 dB pass-band ripple, antialiasing low-pass filter with sharp roll-off, and 105 dB attenuation at the Nyquist frequency. The AD7768 also offers sinc response via a sinc5 filter, a low latency path for low bandwidth, and low noise measurements. The wideband and sinc5 filters can be selected and run on a per channel basis.

Applications

• Data acquisition systems: USB/PXI/Ethernet
• Instrumentation and industrial control loops
• Audio testing and measurement
• Vibration and asset condition monitoring
• 3-phase power quality analysis
• Sonar
• High precision medical electroencephalogram (EEG)/electromyography (EMG)/electrocardiogram (ECG)

Supported Devices

• AD7768

Evaluation Boards

• EVAL-AD7768-FMCZ

A platform is typically comprised of:

• Carrier card with SoC FPGA and 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.

The following platforms are available

• AD7768 Platform User Guide

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