AD5242BR10

Digital Potentiometers Overview

The AD5242BR10 is a dual-channel, 256-position digitally controlled variable resistor (digital potentiometer) manufactured by Analog Devices. It features an I²C-compatible serial interface for programming resistance values between terminal A and the wiper, or terminal B and the wiper. The device offers a nominal end-to-end resistance of 10 kΩ with a ±1% channel-to-channel matching tolerance. Key electrical specifications include a resolution of 8 bits, a nominal temperature coefficient of 30 ppm/°C, and a wiper resistance of 60 Ω to 120 Ω. It operates on a single supply from 2.7 V to 5.5 V or a dual supply of ±2.7 V, supporting an extended industrial temperature range of −40°C to +105°C.

Digital Potentiometers Feature Summary

• Dual-channel architecture with 256 programmable positions (8-bit resolution).
• I²C-compatible 2-wire serial interface with readback capability.
• Internal power-on midscale preset for safe initialization.
• Two extra programmable logic outputs (O1, O2) for driving digital loads.

Digital Potentiometers Applications

• Instrumentation gain and offset adjustment.
• Programmable voltage-to-current conversion.
• Line impedance matching in communications systems.
• Multimedia, video, and audio signal processing.
• Replacement for mechanical potentiometers in embedded systems.

Digital Potentiometers Procurement Notes

Verify the specific package variant against the ordering guide, as the BR10 suffix indicates a 10 kΩ resistance value but does not specify the package type (e.g., SOIC-14 or TSSOP-14) in the provided datasheet text. Confirm the manufacturer is Analog Devices Inc. Ensure the component meets the required operating temperature range of −40°C to +105°C for the intended application environment.

Digital Potentiometers Selection Notes

Select the AD5242BR10 when a dual-channel digital potentiometer with 10 kΩ nominal resistance is required. This model is suitable for applications needing precise channel-to-channel matching within ±1%. Consider the 30 ppm/°C temperature coefficient for stability requirements. Ensure the system design accommodates the 2.7 V to 5.5 V supply range and utilizes an I²C controller capable of generating the necessary start, stop, and acknowledge signals.

Digital Potentiometers Part Context

The AD5242 is part of the AD5241/AD5242 family of I²C-compatible digital potentiometers. While the AD5241 provides a single channel, the AD5242 integrates two independent channels in a single package. Both share identical control interfaces, register maps, and electrical characteristics, differing only in channel count. The BR10 designation specifically denotes the 10 kΩ resistance option within this series.

Digital Potentiometers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. When replacing this component, ensure the substitute supports dual-channel operation, 256 positions, and I²C compatibility. Verify that the replacement's pinout, particularly for the SHDN, SCL, SDA, and address pins (AD0/AD1), matches the original layout to maintain PCB compatibility.