MCP4662-503E/UN

Digital Potentiometers Overview

The MCP4662-503E/UN is a dual-channel digital potentiometer IC manufactured by Microchip Technology. It features two independent rheostat configurations with a nominal resistance (RAB) of 50 kΩ and a tolerance of ±20%. The device provides 8-bit resolution, offering 257 discrete taps for precise adjustment. It utilizes an I2C serial interface for communication and includes nonvolatile memory to retain wiper settings after power loss. The component operates within a supply voltage range of 1.8V to 5.5V and supports extended industrial temperatures from -40°C to +125°C.

Digital Potentiometers Feature Summary

• Dual Rheostat Configuration: Contains two independent variable resistors with 50 kΩ nominal resistance.
• Nonvolatile Memory: Stores wiper positions in EEPROM, ensuring data retention without power.
• I2C Interface: Supports Standard (100 kHz), Fast (400 kHz), and High-Speed (up to 3.4 MHz) modes.
• WiperLock Technology: Allows secure storage of calibration settings in general-purpose memory locations.

Digital Potentiometers Applications

• Precision gain control in instrumentation amplifiers
• Digital trimming of reference voltages
• Programmable bias current generation
• Audio volume or tone control circuits

Digital Potentiometers Procurement Notes

Verify the specific suffix 'UN' corresponds to the MSOP-10 package when sourcing. Confirm that the '-503' designation matches the required 50 kΩ resistance value for the application. Ensure the design accounts for the high-voltage tolerant inputs if interfacing with signals exceeding VDD.

Digital Potentiometers Selection Notes

Select this model over the MCP4661 if a dual-channel configuration is required instead of single-channel. Choose the 503 variant specifically for 50 kΩ applications; use 502 for 5 kΩ or 103 for 10 kΩ. Verify that the I2C bus speed requirements align with the device's support for up to 3.4 MHz High-Speed mode.

Digital Potentiometers Part Context

This component belongs to the MCP46XX family of 7-bit and 8-bit I2C digital potentiometers. It shares architectural similarities with the MCP45XX series but offers dual resistor networks. The device is part of Microchip's portfolio designed for replacing mechanical potentiometers in space-constrained PCB layouts.

Digital Potentiometers Replacement Considerations

Direct pin-compatible alternatives within the same family include the MCP4662-502E/UN (5 kΩ) and MCP4662-103E/UN (10 kΩ). For single-channel needs, the MCP4661-503E/ST is available in a TSSOP-14 package.