AD5122ABRUZ100

Overview

The AD5122ABRUZ100 is a dual-channel, nonvolatile digital potentiometer from Analog Devices. It provides 128 adjustment positions per channel with a nominal resistance of 100 kΩ and an 8% tolerance. The device features a low temperature coefficient of 35 ppm/°C and supports I2C communication for wiper control and memory access. Operating on a single supply from 2.3 V to 5.5 V or a dual supply of ±2.75 V, it includes independent logic supply support down to 1.8 V. Packaged in a 16-lead TSSOP, it ensures data retention for up to 50 years and operates within an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Dual-channel architecture with 128 taps and 100 kΩ nominal resistance
• Nonvolatile EEPROM storage retaining settings for up to 50 years
• I2C-compatible serial interface with programmable address pins
• Wide operating voltage range: 2.3 V to 5.5 V (single) or ±2.75 V (dual)

Applications

• Portable electronics level adjustment
• LCD panel brightness and contrast controls
• Programmable filters, delays, and time constants

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and tape/reel specifications. Confirm that the component meets RoHS compliance requirements for the intended manufacturing process. Ensure proper ESD handling procedures are followed during assembly due to the sensitivity of the CMOS structure.

Selection Notes

Select this model when dual-channel adjustment with nonvolatile memory is required. The 100 kΩ resistance value suits applications needing higher impedance than the 10 kΩ variant. Verify that the system power supply falls within the 2.3 V to 5.5 V range and that the I2C bus speed matches the standard or fast mode specifications.

Part Context

This component belongs to the AD5122A family, which offers dual-channel digital potentiometry. It shares architectural similarities with the AD5142A but differs in resolution, providing 128 positions compared to the 256 positions of the AD5142A. Both variants utilize the same I2C interface and nonvolatile memory technology.

Replacement Considerations

The AD5122BRUZ100 serves as a functional substitute if SPI interface compatibility is acceptable instead of I2C. For applications requiring higher resolution, the AD5142ABRUZ100 provides 256 positions while maintaining the same resistance and package form factor.