LTC2274CUJ

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Data Acquisition is an important technological tool that allows digital systems to recognize, process, and store an analog signal. Within Data Acquisition, Analog-to-Digital Converters (ADCs) are the main device used to convert analog signals into digital information that can be used for further analysis. The LTC2274CUJ is an ADU for data acquisition applications, providing high precision analog signal conversion into digital data. In this tutorial, we will learn about the LTC2274CUJ, its application field and working principle.

What is the LTC2274CUJ?

The LTC2274CUJ is an Analog-to-Digital Converter (ADC) designed by Linear Technology. It is a differential, low-noise, low-power, precision analog signal-to-digital converter (ADC) with an on-chip voltage reference, making it suitable for a wide variety of data acquisition (DAQ) applications. It features a 18-bit resolution, low power consumption of only 500µA typ, and a differential input range of ±7V. The ADC\'s design is based on oversampling with decimation and an innovative implementation of noise shaping techniques for stabilizing the dynamic range of the converter.

Application Field of the LTC2274CUJ

Due to its low noise, low power consumption, and high accuracy, the LTC2274CUJ is well-suited for a variety of data acquisition applications. Some of its applications include:

• Industrial instrumentation and control systems for voltage, current, and pressure measurement;
• DAQ systems for medical devices such as defibrillators and EEG machines;
• Automotive testing equipment used to measure engine performance;
• Analysis and test systems used in the aerospace industry.

Working Principle of the LTC2274CUJ

The LTC2274CUJ is based on the sigma-delta approach, where the analog signal is first oversampled - typically by 64 times - and then used to finely measure the signal. This is accomplished with the difference between the current and previous samples, which allows the converter to accurately measure the input signal with low noise. This gives the LTC2274CUJ its power efficiency and dynamic range.

The LTC2274CUJ also employs several integrated features to improve performance. These include an internal chopper stabilization-controlled amplifier that reduces thermal drift and an integrated low-noise reference. This allows the converter to maintain its accuracy over time, even over long exposure periods. In addition to the integrated features, the LTC2274CUJ also features an integrated digital-filter which provides an additional level of noise filtering.

Conclusion

The LTC2274CUJ is an high quality, low-noise, low-power Analog-to-Digital Converter (ADC) from Linear Technology. It is well suited for a variety of precision data acquisition applications in the industrial instrumentation, medical, and aerospace fields. The LTC2274CUJ is based on the sigma-delta approach and utilizes integrated features, such as an internal chopper stabilization-controlled amplifier, an integrated low-noise reference, and an integrated digital-filter, to maintain its performance over time. Its low noise and low power consumption make it a great choice for high-precision data acquisition.

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