AD7714ARS-3

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Data Acquisition To acquire data, analog signals must be converted into digital signals. Analog to Digital Converters (ADC) can be used to convert analog signals into digital form for computer processing and storage. The AD7714ARS-3 is an integrated, high precision, low noise, 24-bit analog-to-digital converter with a high sampling rate. It is used in various high-end applications such as medical devices, industrial automation, test and measurement, and signal analysis. This article will discuss the application field and working principle of the AD7714ARS-3.

Application Field:

The AD7714ARS-3 is a highly capable 24-bit ADC that can be used in data acquisition applications with high precision and accuracy. The device features a high sampling rate with an input signal ranging from -50 dBV to +10 dBV, as well as specialized features such as automatic offset cancellation and a built-in temperature sensor. The serial interface is programmable and can be used to set all the configuration and conversion parameters. This feature makes the device suitable for highly automated applications. In addition, the AD7714ARS-3 features a low power consumption and operates from a single 1.8-V to 3.3-V supply voltage, making it ideal for portable applications.

Working Principle:

The AD7714ARS-3 is a complete solution for data acquisition. It is composed of a low noise 24-bit ΔΣ modulator and a 14-bit or 16-bit digital to analog converter (DAC). The input signal is first converted to the higher 24 bits resolution using the integrated ΔΣ modulator. This allows for an extremely high dynamic range and extremely low noise signals. The modulated signal is then passed through a digital filter before it is converted to a digital output.

The digital filter is configured to provide anti-aliasing. This algorithm filters out frequencies above the Nyquist frequency, which is half of the sampling rate. Furthermore, the filter can be programmed to apply different filter types, such as low-pass, high-pass, band-pass and band-stop, which can be used to optimize the signal quality. The combination of the ΔΣ modulator and digital filter provides a high accuracy signal with low noise.

In addition, the AD7714ARS-3 features an integrated temperature sensor, which can be used to compensate the output towards temperature variation. This sensor is automatically calibrated and requires no extra settings for operation. The device further incorporates an offset canceller that can be used to compensate for the effects of input gain errors.

The AD7714ARS-3 is also capable of operating in self-calibration mode. This feature allows the converter to continuously check and adjust its settings in order to guarantee high accuracy and precise signal performance.

Conclusion:

The AD7714ARS-3 is a highly integrated and precise 24-bit analog-to-digital converter suitable for many high-precision data acquisition applications. It is designed to work with a wide range of signal frequencies and can be used with an optimized digital filter for better performance. With its integrated temperature sensor, offset canceller and self-calibration feature, it provides excellent signal quality with low noise and low power consumption.

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