AD5241BRZ1M

Digital Potentiometers Overview

The AD5241BRZ1M is a single-channel, 8-bit digital potentiometer with 256 tap positions and a nominal resistance of 1 MΩ. It operates on a single supply from 2.7 V to 5.5 V or dual supplies of ±2.7 V. The device features an I²C-compatible serial interface for wiper position programming and includes two extra programmable logic outputs (O1, O2). Key electrical parameters include a temperature coefficient of 30 ppm/°C, a maximum wiper resistance of 120 Ω, and a power-on midscale preset. It is housed in a 14-lead SOIC package and functions over an extended temperature range of −40°C to +105°C.

Digital Potentiometers Feature Summary

• 256-position digitally controlled variable resistor with 1 MΩ nominal resistance
• I²C-compatible 2-wire serial interface with readback capability
• Two additional programmable logic outputs (O1, O2) for driving digital loads
• Internal power-on midscale preset and self-contained shutdown feature

Digital Potentiometers Applications

• Multimedia, video, and audio systems
• Communications equipment
• Mechanical potentiometer replacement
• Instrumentation gain and offset adjustment
• Programmable voltage-to-current conversion

Digital Potentiometers Procurement Notes

Verify the specific resistance suffix in the part number to confirm the 1 MΩ value, as the AD5241 series also offers 10 kΩ and 100 kΩ variants. Confirm the package type matches the required PCB footprint, as this model uses a 14-lead SOIC. Ensure the design accounts for the volatile memory nature of the wiper position, which resets to midscale upon power-up.

Digital Potentiometers Selection Notes

Select the AD5241BRZ1M when a single-channel digital potentiometer with high end-to-end resistance is required. The 1 MΩ value is suitable for low-current applications where higher impedance minimizes power consumption. Consider the 30% tolerance at 25°C for the 1 MΩ version when designing precision circuits. The I²C interface requires appropriate pull-up resistors on the SDA and SCL lines.

Digital Potentiometers Part Context

The AD5241BRZ1M belongs to the AD5241/AD5242 family of I²C-compatible digital potentiometers. While the AD5242 provides dual channels, the AD5241 is a single-channel variant. The 'B' indicates the industrial temperature range, and 'RZ' denotes the 14-lead SOIC package. The '1M' suffix specifically identifies the 1 MΩ resistance value within this product line.

Digital Potentiometers Replacement Considerations

Direct functional replacements within the same family include other AD5241 variants with different resistance values (e.g., AD5241BRZ10 for 10 kΩ or AD5241BRZ100 for 100 kΩ) if the resistance requirement changes. For dual-channel applications, the AD5242 series may be considered, though it requires a 16-lead package.