AD8842ARZ

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Data acquisition is an important process used in a variety of applications, such as industrial monitoring and control, automotive, and medical instrumentation. Digital to Analog Converters (DACs) are essential components of data acquisition systems, and the AD8842ARZ is a 16-Bit Digital to Analog Converter (DAC) released by Analog Devices. The AD8842ARZ is a low area, low power and high-precision converter designed for commercial and industrial applications. The converter is capable of producing a full-scale output current of 1mA at 5V when the voltage reference is 5V, and can operate from a single 5V supply.

The main features, applications, operating principles and circuit design of AD8842ARZ are summarized below for reference.

Features

• Enhanced dynamic performance in noisy/high-impedance environment;
• Low power consumption and area;
• Low noise and low distortion;
• Wide power supply range (2.5V to 18V);
• Onboard voltage reference;
• 16-bit resolution, better than 0.05 % linearity;
• Onboard accurate ADC;
• Programmable power-down control;
• Wide temperature range (–40 °C to +105 °C).

Applications

• Data acquisition system;
• Digital control and feedback loop;
• Medical instrumentation;
• Electric motors;
• Industrial control systems;
• Signal-generator applications.

Working Principle

The AD8842ARZ is a voltage-output DAC. The working principle of the voltage-output DAC is to convert the digital data into an analog voltage and output the analog voltage through the output pin. The digital input and control signals are used to control the input and output of DAC. The digital signal is converted to an analog current by a digital-to-analog converter (DAC). Then, the analog current is converted to an analog voltage by a reference voltage source and a resistor. Finally, the analog voltage is output from the op-amp.

Circuit Design

The AD8842ARZ is designed to provide 16-bit performance with minimal external components. The small size and low cost of the board makes it ideal for applications where space is at a premium. The circuit includes the AD8842ARZ DAC and its associated reference circuit, including the precision voltage reference.

The input of the DAC consists of a 16-bit data bus and two control lines, CS and WRITE/LD. The CS and WRITE/LD signals control the data flow between the controller and the DAC. When the CS signal is asserted and the WRITE/LD signal is LOW, the data can be loaded into the DAC. The data is converted to an analog voltage and sent to the output pin.

The AD8842ARZ provides an output voltage range of 0V to VREF. The VREF voltage is determined by the reference voltage source and resistor. The output buffer of the AD8842ARZ ensures high accuracy and low total harmonic distortion.

The low power consumption, large signal bandwidth and precise output voltage of the AD8842ARZ make it an ideal choice for commercial and industrial applications. The accurate and precise 16-bit resolution of the AD8842ARZ makes it perfect for applications such as medical instrumentation, electric motors and industrial control systems.

The specific data is subject to PDF, and the above content is for reference