SEN0226

The SEN0226 is a field programmable gate array (FPGA) expansion board featuring an on-board I2C digital potentiometer. It is among the few expansion boards capable of providing both variable analog and digital signals for evaluation purposes. It is part of the Terasic development kit for Altera Cyclone IV FPGA.

Expansion boards allow flexibility to tailor a development system to suit individual requirements. They vary greatly in their purpose and capability. Primarily the boards are used to extend the capabilities of the development system by providing additional interfaces, features, or functionalities. This is typically either by adding hardware-based circuitry or by allowing on-board development of field-programmable gate array (FPGA) applications. The SEN0226 falls into the latter group as it allows for the development of digital potentiometer applications.

The SEN0226 expansion board features two digital potentiometers, providing variable voltage signals for precision circuitry. They can be controlled using the I2C digital communication protocol. The digital potentiometer offers adjustable resistance from 0-100K ohms that can be varied depending on the requirements of the application. It also features three digital logic outputs, allowing for digital signal control options. The board also includes three potentiometers for input control of analog signals with a range of 0-5V. Additionally, it provides options for power supply input and output to the board, as well as an external USB header.

The working principle of the SEN0226 board is based on the established I2C digital protocol. It features an on-board I2C controller which is responsible for communication between the board and the development system. To use the board, the user first connects the power supply to the board and then makes the necessary connections to receive it’s output signals. Then, the user must configure the board for the specific application. This can be done via the I2C controller on the board, using either a software interface or dedicated hardware. Once configured, the board is ready to be used.

In summary, the SEN0226 expansion board is a flexible and useful board capable of providing both variable analog and digital signals for evaluation purposes. It is part of the Terasic development kit for Altera Cyclone IV FPGA and is compatible with a wide range of applications. The board features two digital potentiometers, three digital logic outputs and three potentiometers for input control of analog signals. It is capable of adjusting resistance levels 0-100K ohms and also provides external USB headers for connecting to other devices. Communication with the board is facilitated by an I2C digital protocol.