AD7667ASTZ

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Analog to Digital Converters (ADC) are devices used to convert analog signals or measurements into digital or numerical values. The AD7667ASTZ is a high-performance, low-power, 16-bit, successive approximation register (SAR) Analog to Digital Converter (ADC), with a single-ended input and serial interface. It offers high 16- bit resolution, low-power consumption, an on-chip voltage reference, and low noise.

AD7667ASTZ application field applies to industrial automation, medical imaging, multimedia, communication and audio encoding applications. It is featured with low power, high performance, and wide dynamic range which makes it the suitable for battery power applications.

The working principle of the AD7667ASTZ is based on single-slope conversion technique. In this technique of Analog to Digital Conversion, the analog input is compared with a ramp or triangle generated at the output of a digital to analog converter. The digital to analog converter must produce the reference voltage used to compare the input voltage. The process begins with selection of a pre determined voltage reference by the user. After that, the voltage of the input is compared with the reference voltage. This process is repeated again and again until the voltages are equal or until the end of the count is reached.

The AD7667ASTZ utilizes the SAR technique. It uses an internal digital counter to count down from a maximum value to the point that the analog input testing for comparison is equal to the value that was inputted as reference. The counter is used to count from "F" (all 1’s in binary) to zero. This internal logic allows the device to continuously monitor both the analog and digital voltage levels, compare the two, and make convert the results into a digital code.

The AD7667ASTZ offers various advantages such as, the high resolution and low power consumption which enable the ADC to be used in low power applications. In addition, the AD7667ASTZ provides a digital filter that helps to remove the noise and allows the measurement to be accurate. Moreover, the digital output can be used directly into a digital signal processor or microcontroller.

In conclusion, the AD7667ASTZ is a low power, high performance analog to digital converter that is suitable for various applications in industrial automation, medical imaging, communications and audio encoding. It features a single-ended input, a digital filter and serial interface and utilizes the SAR technique. Additionally, its resolution and low power consumption make it suitable for battery powered applications.

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