AD5144ABRUZ100-RL7

Overview

The AD5144ABRUZ100-RL7 is a quad-channel, nonvolatile digital potentiometer from Analog Devices. It features four independent potentiometers with 256 tap positions and a nominal resistance of 100 kΩ. The device utilizes an I²C-compatible serial interface for programming and data retrieval. Electrical specifications include a maximum resistor tolerance of ±8%, a temperature coefficient of 35 ppm/°C, and a bandwidth of 0.43 MHz at 100 kΩ. It operates on a single supply voltage ranging from 2.3 V to 5.5 V, with a logic supply range of 1.8 V to VDD. The component is housed in a 20-lead TSSOP package and supports operation across an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Quad-channel architecture with 256-position resolution per channel
• Nonvolatile memory retains wiper settings after power loss
• I²C serial interface for control and status readback
• Low wiper resistance of 40 Ω at array ends enables pin-to-pin connection

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm interface compatibility and packaging details. Confirm that the required logic voltage levels align with the system design, as the VLOGIC range extends from 1.8 V to VDD. Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS structure.

Selection Notes

Select this model when a quad-channel configuration with 256 taps is required alongside an I²C interface. The 100 kΩ resistance value suits applications requiring lower current draw compared to the 10 kΩ variant. Verify that the 8% tolerance meets the open-loop accuracy requirements or consider calibration if tighter matching is necessary.

Part Context

This component belongs to the AD5144A family, which provides nonvolatile digital potentiometry solutions. Unlike the standard AD5144 which supports both SPI and I²C, the AD5144A variant is specifically configured for I²C communication only. It shares the same physical footprint and electrical characteristics as other members of the series but differs in interface protocol.

Replacement Considerations

The AD5144BRUZ100-RL7 serves as a functional substitute within the same family. However, it supports both SPI and I²C interfaces rather than I²C exclusively. Designers must verify that the existing circuitry does not rely on specific pin configurations unique to the I²C-only version.