AD5175BCPZ-10-RL7

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Data Acquisition – Digital Potentiometers or DigiPots – have been a popular choice among digital and analog circuit designers for a variety of applications. The AD5175BCPZ-10-RL7 by Analog Devices is one such device that can offer a powerful, reliable, versatile and affordable solution for a range of applications. This guide will provide an overview of the device\'s features, application fields, and working principles.

Overview

The AD5175BCPZ-10-RL7 is a low-power, low-voltage eight-channel digital potentiometer with a wide range of adjustment options. The device is equipped with 10-bit static, nonvolatile digital potentiometers and digital attenuators, making it suitable for a range of applications. Its features include a wide operating voltage range of 2.7V to 4.2V, low-glitch digital potentiometer operation, low power consumption of 120 μA, and a maximum operating temperature of +85°C.

The potentiometer has a series resistance of 10 kΩ, minimal temperature coefficients and a wide operating voltage range of 2.7V to 4.2V. The device also provides a rail-to-rail wiper operation. The device comes in an LFCSP package that allows it to be soldered surface-mountable. All channels have a total resistance of 10kΩ, and the nonvolatile EEPROM registers offer flexibility in the device programming and management of configuration data.

Application Fields

The AD5175BCPZ-10-RL7 is well-suited for applications related to Digital-to-Analog Converters (DACs), digital variable attenuators, signal conditioners, instrumentation and measurement systems, power converters, and more. This low-power and low-voltage DigiPot is ideal for many challenging applications, such as signal conditioning, test and measurement, digital volume control, voltage setting and trimming, signal routing, and RF attenuation.

In particular, this DigiPot is useful for applications requiring high accuracy, long-term stability and reliability, as it maintains its calibrated resistance value over its operating lifetime, thanks to its nonvolatile EEPROM registers. Additionally, it can be used as a programmable gain amplifier and an adjustable gain stage in signal conditioning circuits, DACs, and low-noise signal-conditioning circuits.

Working Principle

DigiPots rely on the internal resistance of a given potentiometer. This is then regulated by a voltage signal applied to the wiper pin, which generally moves between two pins called endpoints. The wiper\'s movement across the pins varies the resistance between the two endpoints, as well as the resistance between the two endpoints. The voltage signal applied to the wiper pin is based on the logic of the DigiPot\'s oscillator. The low-power voltage applied to the wiper can be leveraged to adjust the resistance of the DigiPot quickly and precisely.

In terms of the AD5175BCPZ-10-RL7, the device has 10-bit static, non volatile digital potentiometers and digital attenuators, which provide the user with a wide range of adjustment options. Additionally, for rail-to-rail wiper operation, the device offers two dedicated pins to control the voltage applied to the wiper in either a static or dynamic configuration.

The device also features an onboard oscillator to provide periodic adjustment of the potentiometer and attenuator, as well as a low-power eFuse circuitry for programming, calibration and security purposes. Furthermore, the device offers protection against accidental shorts and ESD events, which is essential for ensuring the longevity of the device.

Conclusion

The AD5175BCPZ-10-RL7 by Analog Devices is a low-power and low-voltage digital potentiometer with a variety of features and capabilities. It is well-suited for applications related to Digital-to-Analog Converters, digital variable attenuators, signal conditioners, instrumentation and measurement systems, power converters, and more. Furthermore, its working principle relies on a combination of a voltage signal applied to the wiper pin, and an onboard oscillator. In this way, it can precisely adjust the resistance of its potentiometer and attenuator in rail-to-rail operation quickly.

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