X9C102SIZ

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Data Acquisition - Digital Potentiometers covers the usage and basic principles of the X9C102SIZ digital potentiometer. Digital potentiometers are electronic parts, often found in the design of control systems, that allow for creating adjustable, repeatable voltage divides. The X9C102SIZ is a digitally-controlled medium-to-high resolution potentiometer, with two independent clock inputs, a voltage range of 2.7V to 10.0V, and a non-volatile memory allowing for a wide range of applications.

Overview

The X9C102SIZ is a non-volatile digital potentiometer, or pot, manufactured by XICOR Corporation. This device is intended to replace standard mechanical and linear potentiometers, while offering superior features and performance. The X9C102SIZ is available in a wide temperature range from -40°C to +85°C, and it operates between a voltage range of 2.7V to 10.0V. The IC operates by varying the resistance between two external connections, RA and RB, and a wiper, which makes it possible to adjust the relative voltage applied between the two external connections. The X9C102SIZ also has two independent clock inputs, a voltage-controlled input, and a non-volatile memory for storing the settings for later use.

Applications

The X9C102SIZ can be found in a variety of applications where precision voltage division or bias control is required, such as instrumentation systems, audio applications, and communications systems. Its non-volatile memory allows for settings to be saved while the device is powered down, while the two independent clock inputs make it easy to interface with microcontrollers without the need for additional external circuitry. The X9C102SIZ is also ideal for applications where space or chemical resistance is of concern, due to its small size and non-volatile memory.

Other uses of the X9C102SIZ include controlling motor speed or servos, attenuating signals in audio applications, setting gain and offset in instrumentation systems, adjusting bias/offset voltages in communications systems, and providing adjustable voltage dividers in any system requiring precision voltage control. The X9C102SIZ is also a highly accurate device, with its 10-bit resolution determining its precise adjustment capability.

Working Principle

The X9C102SIZ operates by varying the wiper voltage with respect to the external RA and RB connections. This is done by using the two independent clock inputs (CK and CS), which can be controlled either by an external clock, a microcontroller, or a combination of both. The voltages at the external connections, RA and RB, determine the position of the wiper, with the maximum voltage being the voltage of the RA connection, and the minimum voltage being the voltage of the RB connection.

The on/off state of the CK pin is what controls the movement of the wiper within the resistance range of the X9C102SIZ. When the CK is high (1), the wiper will move closer to RA; when the CK is low (0), the wiper will move closer to RB. The CS control line determines the direction in which the wiper will move. When the CS is high (1), the wiper will move closer to RA; when the CS is low (0), the wiper will move closer to RB. By varying the voltage on the CK and CS pins, the wiper can be made to move to any resistance within the potentiometer\'s range.

The X9C102SIZ also includes a non-volatile memory, which allows settings to be saved while the device is powered down. This is done by cycling the device on and off, with the settings being stored in the static RAM (SRAM) and overwritten when the device is powered off. The non-volatile memory also allows for the settings to be stored for later use in applications where precise and repeatable voltage division is required, such as audio systems or servo control.

Conclusion

The X9C102SIZ digital potentiometer from XICOR Corporation provides an easy-to-use, reliable and accurate form of adjustable and repeatable voltage division. The device can be used in a variety of applications such as instrumentation systems, audio applications, and communications systems. It features two independent clock inputs, a non-volatile SRAM memory, and a wide temperature range, all making it a useful and powerful tool when precision voltage division and control is required.

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