A High-Precision Data Acquisition System Designed by Using AD7606 and LabVIEW

A high-precision multi-channel data acquisition system was designed for the data acquisition requirements of portable laboratories and signal detection. The system utilizes STM32F407ZGT6 as the control platform, LabVIEW as the display interface, and AD7606 as the core component. Briefly, the system contains a host computer (upper computer) and a slave device (lower computer). The lower computer consists of data processing module, data acquisition one, serial communication one, and power one. For the host computer the user interface is developed by LabVIEW. The data acquisition employs the 16-bit 8-channel sampling chip AD7606. The serial communication is designed to swap data for the host computer. As a test measuring, a system measuring voltage of ±10V and current of 40mA has an error of less than 0.3%. The result directly demonstrates that the system satisfies the initial design requirements.

I. Introduction

In recent years, with the rapid development of science and technology, the demand for portable laboratory equipment is extremely increasing in education, researching and engineering, and so on. Oscilloscope, as a pivotal measuring instrument, plays an important role in various engineering fields, such as electronics, telecommunications, and medical domains. As a portable laboratory equipment, an oscilloscope is one of the most common electronic testing devices. It is an integrated device for signal analysis and comparison, and can be employed to display the waveforms of voltage or current, and as an essential tool to display the time-domain signal measurement[1].