AD5227BUJZ50-RL7

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Data Acquisition - Digital Potentiometers plays an integral role in many operations, from tuning to precision control. The AD5227BUJZ50-RL7 is a versatile digital potentiometer specifically designed to meet a variety of needs. This digital potentiometer is a part of Analog Devices’ potentiometer product family and comes with a series of applications and working principles.

Features

The AD5227BUJZ50-RL7 digital potentiometer device is a single, nonvolatile, 3-channel digital potentiometer. This digital potentiometer, specified over a temperature range of -40 °C to +125°C, is offered in a 10-lead MSOP and 10-lead 2x3 DFN package. It features a user interface of 8 pins and incorporates an on-chip nonvolatile memory, allowing for storage and recall of the most recent settings.

This digital potentiometer also features a higher degree of reliability and accuracy than conventional mechanical potentiometers. It supports an unlimited number of operations, giving it greater accuracy over long periods of time. Additionally, the device has very low parasitic capacitance, which does not deteriorate over time, or with additional operations.

The AD5227BUJZ50-RL7 also offers a broad range of supported resistance values. It has exceptional resistance-ratio linearity and is designed in such a way that it can be easily adjusted to different frequencies. It also offers high operational speed of up to 10V/us.

Applications

The AD5227BUJZ50-RL7 digital potentiometer is used in a variety of applications, including gain and level control, variable impedance matching, trimmer replacement, and serial data transmission control. Its linearity in resistance resistance-ratio assures precise control in any application. Its nonvolatile memory adds further reliability and usability to further applications such as automated motion control for robotic vehicles.

The ability to store and recall settings make this digital potentiometer suitable for operations involving a variety of environmental conditions. Its low parasitic capacitance and extended operational speed reduce the influence of interference on applications like audio amplifiers and signal level control. Additionally, it is used in automotive power train applications like variable exhaust systems.

Working Principle

The AD5227BUJZ50-RL7 digital potentiometer works on the principle of ‘variable resistance per step’. Its resistance varies with each step as the resistance of each step is determined by the stored value of the stored value in the device’s memory. This device utilizes the EEPROM technology which allows for addition or deletion of the resistance depending on the level of voltage present.

The digital potentiometer also incorporates a comparator circuit, which compares the reference voltage applied at the Vref pin with the output of the potentiometer. If the output value is lower than the reference voltage, the comparator produces a logic ‘low’, and a logic ‘high’ when the output value is greater than the reference voltage.

The digital potentiometer also contains an oscillator circuit, which cycles the internal registers, calculating and storing the resistance values of the wiper and terminal points. This data is then used to calculate the exact resistance value. This cycle is repeated depending on the adjusted step values and the amount of resistance variation required.

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