AD5248BRM2.5

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Data Acquisition - Digital Potentiometers: AD5248BRM2.5

Digital potentiometers, such as the AD5248BRM2.5 from Analog Devices, are monolithic integrated integrated resistors used in applications where precise programmed resistor values, electrically controlled trimming or programmable current limiting is required.

In comparison to wire-based adjustable potentiometers, Digital potentiometers offer lower cost, compact packaging, and better temperature stability. The AD5248BRM2.5 has an integrated 32-step serial interface for programming. This digital potentiometer, along with its 32 pin leadless package, is designed for integration into a wide range of system-level applications.

The AD5248BRM2.5 offers a two-terminal wiper output that is programmable, providing a number of important functions, such as programmable voltage dividers, simple analog voltage-controlled current sources, and filters, trimming of circuit poles and offsets, and ideal programmable gain stages.

The device has a 10K Wiper resistance, with an on resistance of 25Ω. Its full scale end-to-end resistance is 100Ω and can operate with a supply voltage of 1.8 V to 7.0 V. The wiper resistance can be externally adjusted and an internal 2:1 multiplexer allows two independent wiper outputs to be routed to different end-of-wiper and reference pins.

The wiper position is controlled using an 8-bit serial data stream, with a maximum switching frequency of 100kHz for a 3-wire configuration and 600kHz for the 2-wire configuration. The central logic of the device is powered by an Internal Charge Pump, which means that no external voltage source is required.

The AD5248BRM2.5 also has a power-on reset feature that returns the wiper to midpoint. The AD5248BRM2.5 is ideal for use in Automotive, Medical, Industrial Monitoring and Control, and many other applications.

The Working Principle of the AD5248BRM2.5 is a 3-terminal Non-volatile Memory operated device. The central logic of the device handles the task of intuitive programming, while the Wiper resistance is controlled by an 8-bit serial data stream. It is sometimes referred to as a \'virtual potentiometer\' because of the way it controls Wiper current by means of its internal logic. A voltage control voltage is provided to the Wiper of the device, and its value is determined by the applied logic. The Wiper resistance is programmed for the desired output voltage, and the logic is used to control the current supplied to the Wiper.

The AD5248BRM2.5 is an ideal choice for those seeking a robust and feature-rich digital potentiometer solution. Its versatile design allows for a variety of applications and its high switching frequency ensures accurate and precise control of Wiper resistance over the entire range. The device can be easily used in systems requiring cost-effective yet high-performance digital potentiometer solutions.

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