AD7863ARZ-10

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AD7863ARZ-10 is an integrated circuit belonging to the data acquisition – Analog to Digital Converters (ADC) family. An Analog to Digital Converter (ADC) is an integrated circuit that takes an analog signal in the form of various forms of inputs, including voltage, temperature, and pressure, and converts it into digital format with a predetermined resolution.

The AD7863ARZ-10 is a 10-bit Analog to Digital Converter with a sampling rate of up to 25 MHz. Its features include 11 channels with 16-pin TSSOP package, a fast settling time of 290 ns and a low power-down current of 200 μA. The AD7863ARZ-10 supports a wide range of single-ended and differential input ranges from -0.6V to +6.4V.

AD7863ARZ-10 is most suitable for use in precision data acquisition applications such as industrial process control, motor control, and medical imaging. It is an ideal choice for systems that require high accuracy, low power consumption, and fast sample and hold performance. In addition to the advantages of high resolution and speed, the AD7863ARZ-10 also offers an output rate of up to 10 kHz with a conversion time of 25 ns.

The internal architecture of the converter consists of a cascade of a voltage-to-current converter, a sample-and-hold amplifier, a 10-bit successive-approximation register, as well as a low-power voltage reference.

The voltage-to-current converter at the input converts the measured analog voltage into a proportional current. This current is then subjected to the sample-and-hold amplifier (SHA). The SHA locks the current for a certain period of time established by the clock. The SHA output is connected to the successive approximation register (SAR). The SAR is used to perform a binary comparison sequence where each bit is sampled sequentially and compared to the reference voltage until the final output.

The reference voltage is internally generated by a low-power voltage reference and has a range of 0.453V to 4.809V. The internal reference enables the conversion time to be significantly reduced compared to externally referenced ADCs.

The AD7863ARZ-10 also features a programmable stand-by mode which allows the user to reduce power consumption while retaining the last value stored in the output register. This allows the microcontroller to quickly switch to active mode when needed.

The AD7863ARZ-10 also supports serial communications over a 3-wire interface. The communication interface is compatible with standard microcontroller and DSP protocols such as SPI and I2C, making it easy to use with a wide range of microcontrollers or digital signal processors.

In summary, the AD7863ARZ-10 is an ideal choice for precision data acquisition due to its high resolution, fast sample and hold performance, low power consumption, and compatibility with standard microcontroller protocols. Its wide range of input ranges make it suitable for a variety of applications and its programmable stand-by mode provides further flexibility in power management.

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