AD5251BRU1

Digital Potentiometers Overview

The AD5251BRU1 is a dual-channel, I2C-compatible digital potentiometer featuring nonvolatile memory (EEMEM) for wiper setting retention. It provides 64-position resolution with a nominal resistance of 50 kΩ and linear taper. The device operates on a single supply from 2.7 V to 5.5 V or a dual supply of ±2.25 V to ±2.75 V. Key specifications include a typical power-on refresh time of 300 µs, 100-year data retention at 55°C, and an operating temperature range of –40°C to +105°C. It is housed in a TSSOP-14 package.

Digital Potentiometers Feature Summary

• Dual-channel architecture with 64-position resolution per channel
• Nonvolatile EEMEM stores wiper settings and resistance tolerance data
• I2C serial interface supporting up to four devices via address pins
• Programmable increment/decrement and ±6 dB step commands

Digital Potentiometers Applications

• Mechanical potentiometer replacement
• LCD panel VCOM adjustment
• White LED brightness control
• Sensor calibration circuits

Digital Potentiometers Procurement Notes

Verify the specific suffix 'RU1' against official Analog Devices documentation to confirm the exact resistance value and package variant. Confirm RoHS compliance status as datasheets may vary by revision. Check current lifecycle status, as older variants may be discontinued.

Digital Potentiometers Selection Notes

Select this component when a dual-channel digital solution with nonvolatile storage is required. Ensure the 50 kΩ resistance value matches the circuit design. Verify that the I2C bus speed does not exceed 400 kHz and that pull-up resistors are correctly sized for the supply voltage.

Digital Potentiometers Part Context

This part belongs to the AD5251/AD5252 family of digitally controlled potentiometers. While the AD5252 offers 256 positions and multiple resistance options, the AD5251 is restricted to 64 positions and a 50 kΩ nominal resistance. Both share the same pinout and I2C interface protocol.

Digital Potentiometers Replacement Considerations

Direct replacements within the same family include other AD5251 variants with different resistance values (e.g., AD5251BRU50). Cross-family replacements require verifying pin compatibility and I2C register mapping.