MCP4652-103E/UN

Digital Potentiometers Overview

The MCP4652-103E/UN is a dual-channel digital rheostat IC manufactured by Microchip Technology. It features two independent resistor networks, each with a nominal resistance of 10 kΩ and an 8-bit resolution providing 257 discrete taps. The device utilizes volatile memory to store wiper positions and communicates via a standard I²C serial interface supporting 100 kHz, 400 kHz, and high-speed modes up to 3.4 MHz. It operates within a supply voltage range of 1.8V to 5.5V and includes high-voltage tolerant inputs capable of withstanding up to 12.5V. The component is housed in a compact MSOP-10 package and is rated for extended industrial temperatures from -40°C to +125°C.

Digital Potentiometers Feature Summary

• Dual 8-bit Digital Rheostat Configuration: Two independent channels with 10 kΩ nominal resistance and 257 tap steps.
• I²C Serial Interface: Supports Standard (100 kHz), Fast (400 kHz), and High-Speed (up to 3.4 MHz) communication modes.
• High-Voltage Tolerant Inputs: Digital input pins tolerate voltages up to 12.5V, allowing compatibility with higher voltage logic levels.
• Wide Operating Voltage Range: Functional operation from 1.8V to 5.5V, with full electrical specifications guaranteed from 2.7V to 5.5V.

Digital Potentiometers Applications

• Programmable gain amplifiers requiring precise analog signal attenuation or gain adjustment.
• Voltage reference trimming and calibration circuits in measurement systems.
• Digital potentiometer replacement in legacy analog volume control or biasing applications.
• Sensor signal conditioning where variable resistance is needed for impedance matching or filtering.

Digital Potentiometers Procurement Notes

Verify the specific suffix 'UN' corresponds to the MSOP-10 package and tube packaging when sourcing. Confirm that the application design accounts for the volatile nature of the wiper memory, as power loss will reset the resistance values to their default state. Ensure the I²C bus speed requirements align with the supported 100 kHz, 400 kHz, or 3.4 MHz modes based on the system clock constraints.

Digital Potentiometers Selection Notes

Select this model over the MCP4651 if a dual-rheostat configuration is required instead of dual-potentiometer. Choose the '-103' suffix specifically for the 10 kΩ resistance value; other suffixes like '-502' or '-104' denote different resistance ranges. Consider the MCP4642 series if non-volatile memory retention is necessary to preserve settings across power cycles, as the MCP4652 relies on volatile RAM.

Digital Potentiometers Part Context

This component belongs to the MCP46XX family of dual digital potentiometers/rheostats from Microchip. It shares the same core architecture and pinout as the MCP4632 (7-bit) and MCP4662 (non-volatile 8-bit). The '52' designation indicates an 8-bit resolution with volatile memory and a rheostat pinout configuration. It is part of a broader ecosystem including single-channel variants and SPI-interface devices.

Digital Potentiometers Replacement Considerations

Direct functional substitutes include the MCP4652T-103E/UN (tape and reel packaging variant) and the MCP4652-103E/ST (SOIC-8 package variant). For non-volatile requirements, the MCP4662-103E/UN offers identical electrical characteristics with EEPROM storage. Cross-family replacements like the MCP4632-103E/UN are compatible but offer reduced 7-bit resolution.