AD5254BRU50

Digital Potentiometers Overview

The AD5254BRU50 is a quad-channel, I²C-compatible, nonvolatile memory digitally controlled potentiometer featuring 256-position resolution per channel. It offers nominal end-to-end resistance options of 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V or a dual supply of ±2.25 V to ±2.75 V. Key electrical characteristics include a 4 MHz bandwidth for the 1 kΩ version, 100-year typical data retention at 55°C, and an operating temperature range of –40°C to +105°C. It integrates patented resistance tolerance storage in its EEMEM.

Digital Potentiometers Feature Summary

• Quad-channel architecture with 256 digital positions per RDAC
• Nonvolatile EEMEM stores wiper settings with write protection and automatic power-on restoration
• I²C serial interface supporting synchronous/asynchronous updates and predefined increment/decrement commands
• Patented resistance tolerance storage for precision applications

Digital Potentiometers Applications

• Mechanical potentiometer replacement
• Low-resolution DAC replacement
• RGB LED backlight control
• White LED brightness adjustment
• RF base station power amplifier bias control

Digital Potentiometers Procurement Notes

Verify the specific resistance value suffix (e.g., BRU50 indicates 50 kΩ) against design requirements. Confirm package type TSSOP-20 compatibility. Ensure I²C bus pull-up resistors are selected according to the specified clock frequency limits. Check for any regional distribution restrictions or discontinuation notices associated with this specific part number variant.

Digital Potentiometers Selection Notes

Select based on required nominal resistance (1 kΩ, 10 kΩ, 50 kΩ, or 100 kΩ). Consider the 1 kΩ version for higher bandwidth needs (4 MHz), while higher resistance values offer lower bandwidth but potentially lower noise. Verify that the system voltage falls within the 2.7 V to 5.5 V single-supply range. Ensure the host controller supports the I²C protocol and can handle the acknowledge polling during EEMEM write cycles.

Digital Potentiometers Part Context

The AD5254 is part of the AD5253/AD5254 family of quad-channel digital potentiometers manufactured by Analog Devices. It serves as the 256-position counterpart to the AD5253, which provides 64-position resolution. Both devices share identical pinouts, interfaces, and nonvolatile memory features, differing primarily in resolution and associated command sets.

Digital Potentiometers Replacement Considerations

Direct functional replacements within the same family include the AD5254BRUZ1 (1 kΩ) and AD5254BRUZ10 (10 kΩ). For 100 kΩ variants, consider the AD5254BRUZ100. All share the TSSOP-20 package and I²C interface. Ensure the substitute matches the required nominal resistance and resolution specifications.