MCP4261-503E/SL

Digital Potentiometers Overview

The MCP4261-503E/SL is a dual-channel, 8-bit digital potentiometer featuring non-volatile memory and SPI interface. It provides two independent resistor networks with 257 adjustable taps (wiper positions) and a nominal resistance of 50 kΩ. The device operates within a supply voltage range of 2.7V to 5.5V and supports an extended temperature range from -40°C to +125°C. Key features include WiperLock™ technology for securing calibration settings in EEPROM, high-voltage tolerant digital inputs up to 12.5V, and terminal disconnect capabilities via the SHDN pin or TCON register.

Digital Potentiometers Feature Summary

• Dual 8-bit Potentiometers: Two independent channels with 257 steps and 50 kΩ nominal resistance.
• Non-Volatile Memory: Stores wiper settings using EEPROM with WiperLock™ technology for security.
• SPI Interface: Supports 10 MHz operation in modes 0,0 and 1,1 with high-speed read/write access.
• High Voltage Inputs: Digital control pins tolerate voltages up to 12.5V, enabling split-rail applications.

Digital Potentiometers Applications

• Industrial process control systems requiring remote gain adjustment
• Audio equipment for digital volume and tone control
• Test and measurement instruments needing precise voltage reference tuning

Digital Potentiometers Procurement Notes

Verify the package type matches the application requirements, as the 'SL' suffix indicates a SOIC-14 package. Confirm that the specific ordering suffix aligns with the desired temperature grade and packaging format before procurement. Ensure compatibility with the system's SPI clock speed and voltage levels.

Digital Potentiometers Selection Notes

Select this component when dual-channel resolution is required without volatile memory loss during power cycles. The 50 kΩ value suits moderate impedance circuits. Consider the 12.5V input tolerance if interfacing with higher voltage logic domains. Verify thermal dissipation requirements for the SOIC-14 package in enclosed environments.

Digital Potentiometers Part Context

This part belongs to the MCP414X/416X/424X/426X family of single and dual SPI digital potentiometers. It shares architectural similarities with other members like the MCP4262, differing primarily in the potentiometer versus rheostat configuration and channel count. The family emphasizes non-volatile storage and robust digital interfaces for embedded control.

Digital Potentiometers Replacement Considerations

Direct replacements within the same family include the MCP4261T-503E/ST (tape and reel version) or MCP4261-503I/SL (industrial temperature grade). Ensure substitute parts maintain the same 8-bit resolution, non-volatile memory capability, and SOIC-14 footprint.