**AD5228BUJZ10-RL7: A Comprehensive Technical Overview of the 10kΩ Digital Potentiometer**
The **AD5228BUJZ10-RL7** from Analog Devices is a monolithic 128-position, digitally controlled variable resistor (VR) designed to deliver outstanding performance in a compact form factor. This device provides a highly reliable and programmable alternative to traditional mechanical potentiometers, enabling precise adjustment and calibration in a wide array of electronic circuits without the need for manual intervention. Its **non-volatile memory (NVM)** ensures that the wiper setting is retained even when power is removed, a critical feature for applications requiring a preset configuration upon power-up.
Housed in a space-saving **3mm x 3mm 8-lead LFCSP package**, this digital potentiometer is engineered for high-density PCB designs. It operates over a wide supply voltage range from **2.7V to 5.5V**, making it compatible with both 3V and 5V systems. The nominal resistance between its Terminal A and Terminal B is **10kΩ**, with a wiper that moves across 128 discrete steps, offering a resolution of approximately 78Ω per step. This allows for fine-grained control in signal conditioning and level-setting applications.
A key feature of the AD5228 is its **simple 2-wire serial interface**, which is compatible with I²C and allows for easy communication with microcontrollers and digital processors. The device supports both standard (100kHz) and fast (400kHz) mode communication, facilitating quick updates to the wiper position. The wiper resistance is typically **70Ω at 5V**, which is low enough to minimize its impact on the overall resistance value in series and rheostat configurations.
The performance of the AD5228BUJZ10-RL7 is characterized by its low temperature coefficient of 35 ppm/°C, ensuring stable operation across industrial temperature ranges. It is designed for applications such as **programmable voltage regulation, LCD bias control, sensor calibration, and audio volume control**. Its ability to be controlled digitally eliminates the common issues of mechanical wear and tear, dust contamination, and vibration sensitivity associated with traditional pots.
**ICGOOODFIND**: The AD5228BUJZ10-RL7 stands out as a robust and highly integrated solution for system-level design, offering the perfect blend of non-volatile memory, a compact footprint, and a simple digital interface for modern electronic calibration and adjustment needs.
**Keywords**: Digital Potentiometer, Non-Volatile Memory, I²C Interface, Programmable Resistor, Signal Conditioning.
