AD7893AN-2

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Data acquisition is the process of measuring different conditions or phenomena that exist in a system. It involves measuring various physical conditions ranging from temperature, pressure, vibration, temperature, position, voltage and current. A Data Acquisition System (DAS) is a device or software that is used to capture important information from a system in a certain electrical form and convert it into digital form. Analog to digital converters (ADC) are one type of device used to facilitate the data acquisition process. AD7893AN-2 is a 16-bit, 4-channel, single-supply analog-to-digital converter (ADC) which is specially designed to improve performance in a multi-channel environment. This paper will discuss the application field of AD7893AN-2 and its working principle.

Application Field of AD7893AN-2

The AD7893AN-2 is a low-power, high-performance, multi-channel ADC that can simultaneously acquire four channels of data. The device is designed to be integrated into systems needing data acquisition from various sensors such as thermocouples, strain gages, and bridge circuits. The ADC is capable of accommodating several different inputs such as single-ended and differential input and broad range of common-level inputs. It has a 16-bit resolution that is suitable for many industrial and automotive applications.

Because of its small form factor and wide input range, the AD7893AN-2 is ideally suited for automotive applications such as Engine Control Units (ECUs). It is capable of simultaneously monitoring multiple temperature, pressure, or position sensors located in various points of the engine. It can also be used to detect changes in voltage or current levels that could indicate a problem. The ADC features rail-to-rail input range which makes it suitable for monitoring single-ended signals such as those found in vehicle sensors. Other potential applications include gas and oil metering, industrial safety monitoring, and process control.

Working Principle

The working principle of the AD7893AN-2 is based on successive approximation. It is a type of ADC that works by comparing a reference voltage to the input voltage. The voltage output of the ADC is usually in the form of a digital code which can then be converted into a digital representation. The successive approximation method works by repeatedly comparing the reference voltage with the input voltage, and adjusting the reference voltage based on the difference in voltage. This process is repeated until the reference voltage exactly matches the input voltage. Once the reference voltage has been adjusted to the same level as the input voltage, the corresponding digital code is outputted.

In order to make the comparison, the analog input signal is first converted into a digital form using a sample-and-hold circuit. This enables the device to convert input frequencies of up to 40 kHz. After the signal is converted into a digital form, it is then fed into a comparator. The comparator then compares the reference voltage with the input voltage. The reference voltage is then adjusted based on the comparison between the two. This process is repeated until the two voltages are the same, and the corresponding digital code is outputted.

In addition to the 16-bit resolution, the AD7893AN-2 also features a high speed of conversion. It is capable of converting data at speeds of up to 400 kSPS. The ADC also offers low input offset and low offset drift, ensuring low-noise operation. The device is also equipped with an internal oscillator, making it possible to design a single-chip solution. This makes it suitable for tight spacing requirements such as that found in automotive applications.

The AD7893AN-2 is a high-performance, low-power, multi-channel ADC that is ideal for automotive, industrial, and process control applications. Its small size and wide input range make it well suited for distributed data acquisition systems. It is equipped with a 16-bit resolution and a high-speed conversion rate, making it suitable for high-speed applications. The ADC also offers low input offset and low offset drift, ensuring low-noise operation. The device is also equipped with an internal oscillator, making it possible to design a single-chip solution for tight spacing requirements.

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