AD8402ARZ100

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Data acquisition is the process of acquiring and recording data for analysis and future use. Digital potentiometers are one of the components commonly used in data acquisition. AD8402ARZ100 application field and working principle are discussed in this article.

The AD8402ARZ100 is an integrated digital potentiometer, made with a metal-oxide semiconductor field-effect transistor (MOSFET), designed specifically for data acquisition applications by Analog Devices. With its advanced features, the AD8402ARZ100 is ideal for applications such as set-point voltage regulation, voltage dividing, thermal sensing, and gain setting. This allows it to be used in a wide variety of industrial, automotive, and vehicle design applications.

The application of the AD8402ARZ100 starts with an analog multiplier/divider circuit. This circuit is used as an intermediary to scale incoming signals either up or down so they can be sent to other circuits while remaining within their operating ranges. For example, a signal of 0-1.2V can be amplified up to 3-6V before being sent to the next circuit. Alternatively, a signal of 0-10V can be scaled down to 0.2-2V before being sent to other circuits.

The working principle of the AD8402ARZ100 follows a two-stage process. In the first stage, the digital potentiometer synchronously switches two metal-oxide semiconductor field-effect transistors (MOSFETs). This shifting may be done simultaneously (parallel with both MOSFETs on or off) or serially (one MOSFET on and the other off). The amount of resistance provided to the circuit is adjustable by changing the amount of current flowing through one of the MOSFETs. This current can be adjusted in 0.1 increments of up to 256 total steps.

In the second stage, the digital potentiometer tunes the MOSFET resistance. In this stage, the resistance value for each of the resistors is tuned by changing the inputs to the integrated circuit. The tuning can be done with analog or digital signals. The resolution of this stage is more precise than the first stage, allowing the AD8402ARZ100 to provide extremely accurate resistance values.

The AD8402ARZ100 is an ideal choice for applications where a variety of resistance values are needed, but they must remain consistent across a wide range of temperatures. The two-stage design ensures reliable, accurate results, even under harsh environmental conditions. Additionally, because the digital potentiometer can switch between different resistors, it can be used to create custom filter networks.

Overall, the AD8402ARZ100 is an integrated digital potentiometer for data acquisition applications. It combines two MOSFETs to create a variable-resistance network in a two-stage design. This allows it to accurately adjust resistance from 0.1 to 256 increments and it can be used to create various filter networks. The AD8402ARZ100 is perfect for industrial, automotive, and vehicle design applications.

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