DEM-ADS7864

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Analog to Digital Converters (ADCs) are an important component of modern electronic systems. The DEM-ADS7864 Evaluation Board from Dialog Semiconductor provides a mechanism for testing and evaluating ADCs, specifically the ADS7864 8-bit, 100kHz ADC, which is designed to work with microcontrollers, computer systems, and other digital processing components. This article will focus on evaluating the application field and working principle of the DEM-ADS7864 Evaluation Board.

The DEM-ADS7864 Evaluation Board is designed specifically to evaluate the performance of the ADS7864. It supports a typical 8-bit serial interface and 10-bit resolution. It operates from a 5V DC power source, providing up to 400kHz sampling rate for single-ended input signals. The board is also constructed to facilitate easy prototyping of circuits and includes a few selectable pins for signal conditioning. The board allows for two differential inputs, a single ended input, and an emulation mode, giving users a variety of options for evaluating the ADS7864.

The DEM-ADS7864 Evaluation Board is ideal for use in applications that require an ADC with low power consumption and fast conversion time. The board provides multiple input options, which makes it suitable for communicating with sensors and other signal sources. Additionally, the board has integrated signal conditioning capabilities, as well as analog, digital, and power management circuit blocks, which allow developers to rapidly prototype and evaluate the ADS7864\'s performance in specific applications.

The working principle behind the DEM-ADS7864 Evaluation Board is based on the operation of the ADS7864 ADC. The ADC contains a 10-bit pipelined ADC which can measure an input voltage up to 5V in a single sampling period. The ADC also contains power management and analog circuitry, which allow it to operate with a low amount of power. When an input signal is applied to the board, the signal is first buffered and then converted to a digital value.

The digital value is then transformed into a digital-to-analog converter (DAC) output voltage, which is then fed back into the ADC. The ADC then re-samples the new DAC output voltage and compares it to the original input signal. If the two match, the data is then converted into a digital word and stored in a buffer. If the values do not match, the conversion process is repeated until they match. Once the correct digital value is found, it is then stored into a register for later use.

The DEM-ADS7864 Evaluation Board is designed to help users evaluate and troubleshoot the ADS7864 ADC. It is ideal for use in applications that require an ADC with low power consumption and fast conversion time. Additionally, the board allows users to rapidly prototype and evaluate the performance of the ADS7864 in specific applications. This evaluation board provides users a simple and intuitive way to quickly and effectively test the ADS7864.

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