AD5228BUJZ50-R2

Digital Potentiometers Overview

The AD5228BUJZ50-R2 is a single-channel, 32-position digital potentiometer manufactured by Analog Devices. It features a 50 kΩ end-to-end terminal resistance with a linear taper and ±20% tolerance. The device operates on a supply voltage ranging from 2.7 V to 5.5 V, drawing a typical standby current of 0.4 µA. Control is achieved via two active-low pushbutton inputs (PU and PD) or digital signals, utilizing an internal adaptive debouncer for manual operation. The wiper position is volatile and resets to midscale or zero-scale upon power-up based on the PRE pin state. It is housed in a compact TSOT-8 surface-mount package.

Digital Potentiometers Feature Summary

• 32-position resolution with 5-bit control logic
• Manual up/down interface with built-in adaptive debouncer
• Autoscan mode providing 4 steps per second during continuous button press
• Pin-selectable power-on preset to midscale or zero-scale

Digital Potentiometers Applications

• Mechanical potentiometer and trimmer replacements
• LCD backlight, contrast, and brightness controls
• Digital volume control in audio amplifiers
• Portable device-level adjustments
• Programmable power supply settings

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix R2 against the manufacturer's current data sheet to confirm packaging details such as reel size or tape width. Confirm that the 50 kΩ resistance value matches the design requirements, as the AD5228 family also offers 10 kΩ and 100 kΩ variants. Ensure the TSOT-8 footprint aligns with the PCB layout specifications.

Digital Potentiometers Selection Notes

Select this component when solid-state replacement for mechanical pots is required with minimal external components. The 50 kΩ value balances power consumption and bandwidth; lower values offer higher bandwidth but increase current draw. Verify that the application does not require nonvolatile memory retention, as the AD5228 uses volatile storage for the wiper position.

Digital Potentiometers Part Context

This part belongs to the AD5228 series of manual up/down control digital potentiometers. It serves as a direct functional replacement for mechanical potentiometers in applications requiring simple user adjustment without complex microcontroller interfaces. The BUJZ designation indicates the 50 kΩ resistance variant in the TSOT-8 package.

Digital Potentiometers Replacement Considerations

Direct functional equivalents include the CAT5128 from ON Semiconductor. When replacing mechanical pots, ensure the new digital solution supports the required voltage levels and current handling capabilities at the wiper terminal.