EVAL-AD7147EBZ Application Field and Working Principle

Introduction

The EVAL-AD7147EBZ Evaluation Board is designed for use with the AD7147 family of four-wire sensed, advanced capacitive sensing ICs. The board is designed for evaluating and prototyping applications requiring human interface capabilities using a capacitance sensing approach. It contains interfaces for connecting the EVAL-AD7147EBZ board to a host processing board in the form of UART, SPI and I2C interfaces.

Application Field

The EVAL-AD7147EBZ Evaluation Board enables engineers to quickly evaluate and prototype differentiated capacitive sensing applications, such as touchscreen controllers, proximity and gesture sensing, as well as a variety of consumer and industrial demand applications.

Applications such as car navigation systems, gaming consoles, industrial touchscreens, as well as home automation, weather sensing and appliance touch commands are only a few requirements that could benefit from this high accuracy capacitive sensing technology.

Working Principle

The core of the EVAL-AD7147EBZ Evaluation Board is the AD7147 capacitive sensing chip. This chip senses changes in capacitive proximity or touch by sensing current flow through two adjustable, low power CMOS capacitance to voltage converters. It uses a Sense Coil Matrix technology to provide high accuracy and fast system response times.

The chip is connected via SPI, I2C or UART bus to a host microcontroller. The microcontroller is responsible for the correct operations of the capacitive sensing system. The microcontroller is also responsible for detecting and responding to triggers, such as touch, proximity, and gestures.

The AD7147-based evaluation board offers a wide range of integrations for designing versatile capacitive sensing systems. The board is mainly used in automotive, medical, consumer electronics and industrial applications.

Conclusion

The EVAL-AD7147EBZ Evaluation Board is a high-performance, low-power, and cost-effective capacitive sensing IC solution. It is designed for use with the AD7147 family of four-wire sensed, advanced capacitive sensing ICs and perfect for rapid prototyping and evaluation of capacitive sensing applications, such as touchscreen controllers, proximity and gesture sensing, as well as a variety of consumer and industrial demand applications. This capacitive sensing technology provides high accuracy and fast system response times.