As technology advances, companies are finding ways to make it easier for developers to design and test their applications. The STEVAL-ISA068V1 is one such development board. This board offers users the ability to evaluate and test high-performance MEMS microphones, such as the MP34DT05-A. In this article, we’ll provide a comprehensive guide to the STEVAL-ISA068V1 and show how this board can be used to develop and test microphone applications.

What is STEVAL-ISA068V1?

STEVAL-ISA068V1 is a compact evaluation board designed to test and evaluate the MP34DT05-A microphone, which is a high-performance MEMS microphone. The board is equipped with a preamplifier to amplify the signals and offers a flexible power supply (from 2.4V to 3.6V). The board also has a USB micro-B connector, which allows you to connect the board to a PC and control it using STMicroelectronics’s Unico GUI software.

Specifications

Some of the key specifications for the STEVAL-ISA068V1 board are:

Supply voltage: 2.4 V – 3.6 V

Analog output voltage: 0.5 V to 3.2 V

Sensitivity: -38 dBV/Pa

Signal-to-noise ratio: 64 dB

Frequency response: 20 Hz – 20 kHz

Getting started with STEVAL-ISA068V1

Before you start using the board, there are few things you need to do. First, connect the USB cable to the board and your PC. The board will show up as a “MEMS Microphone Board” on your PC. Next, download the Unico GUI software from the STMicroelectronics website and install it. Once the software has been installed, open it and connect to the board. You can now start configuring and testing your application.

Using the Unico GUI

The Unico GUI provides a user-friendly interface to configure and test your microphone application. There are several different tabs that allow you to modify settings, display data, and analyze the signal. Here are a few of the key tabs:

Configuration

The Configuration tab allows you to modify settings such as the digital filter, gain, and acquisition rate. You can also select the microphone mode (single-ended or differential) and adjust the power supply voltage.

FFT

The FFT tab shows the frequency spectrum of the recorded signal. This is useful when you want to analyze the frequency response of the microphone.

Sound Recording

The Sound Recording tab allows you to record and playback sounds. You can adjust the gain and sampling rate, and the recorded sound can be saved as a WAV file.

Examples

To help you get started, here are a few examples of applications that can be developed using the STEVAL-ISA068V1 board:

Voice Recognition

Voice recognition is a popular application for MEMS microphones. Using the STEVAL-ISA068V1 board, you can test and develop your voice recognition algorithms. By analyzing the recorded sound, you can train your system to recognize specific words or phrases.

Acoustic Sensing

Another application of the STEVAL-ISA068V1 board is acoustic sensing. This can be used to detect specific sounds or frequencies. For example, you could use the board to detect the sound of breaking glass or the frequency of a beeping alarm.

Conclusion

The STEVAL-ISA068V1 is a powerful and versatile evaluation board that can be used to develop and test microphone applications. With its flexible power supply, USB interface, and Unico GUI software, this board offers an easy and user-friendly way to design high-performance MEMS microphone applications. Whether you’re developing voice recognition software or acoustic sensing systems, the STEVAL-ISA068V1 is the perfect tool for the job.