MCP4652T-502E/UN

Digital Potentiometers Overview

The MCP4652T-502E/UN is a dual-channel digital potentiometer IC featuring volatile memory and an I²C serial interface. It provides two independent rheostat configurations, each with 8-bit resolution offering 257 discrete taps. The end-to-end resistance (RAB) is specified at 5 kΩ with a ±20% tolerance. The device operates within a supply voltage range of 1.8V to 5.5V, supporting standard, fast, and high-speed I²C modes up to 3.4 MHz. It includes high-voltage tolerant inputs up to 12.5V and functions across an extended temperature range from -40°C to +125°C.

Digital Potentiometers Feature Summary

• Dual Rheostat Configuration: Two independent resistor networks with 8-bit (257 tap) resolution.
• I²C Serial Interface: Supports 100 kHz, 400 kHz, and 3.4 MHz clock speeds with high-speed read/write capabilities.
• High-Voltage Tolerant Inputs: Digital input pins tolerate voltages up to 12.5V regardless of VDD level.
• Extended Operating Range: Functional operation from 1.8V to 5.5V with an operating temperature range of -40°C to +125°C.

Digital Potentiometers Applications

• Programmable gain amplifiers requiring precise analog signal adjustment.
• Voltage reference trimming in precision measurement systems.
• Digital control of bias currents or LED brightness levels.
• Audio volume control circuits utilizing rheostat configuration.

Digital Potentiometers Procurement Notes

Verify the 'T' suffix indicates tape-and-reel packaging and 'UN' denotes the MSOP-10 package. Confirm the '502' code corresponds to the 5 kΩ resistance value. Ensure the system design accounts for volatile memory behavior upon power loss, as wiper settings are not retained without external non-volatile storage.

Digital Potentiometers Selection Notes

Select this component when dual-channel digital resistance control is required via I²C. The 5 kΩ value suits applications needing moderate current handling with low thermal noise. Compare against MCP4651 if potentiometer configuration is preferred over rheostat. Consider MCP4662 if non-volatile memory retention is necessary for power-down state preservation.

Digital Potentiometers Part Context

This part belongs to the MCP45XX/MCP46XX family of digital potentiometers manufactured by Microchip Technology. The MCP46X series specifically designates dual-resistor network devices with volatile RAM-based wiper storage. It complements single-channel variants like the MCP4552 and non-volatile counterparts such as the MCP4662 within the same pin-compatible ecosystem.

Digital Potentiometers Replacement Considerations

MCP4652-502E/UN (Tube packaging instead of Tape & Reel).

Digital Potentiometers FAQ

What is the default wiper position after power-up?

Upon Power-On Reset (POR) or Brown-Out Reset (BOR), both wipers initialize to the mid-scale position (code 80h for 8-bit devices).

How does the Terminal Control (TCON) register function?

The TCON register allows individual disconnection of the wiper from the resistor network terminals, enabling open-circuit states for specific channels.

Is the memory volatile or non-volatile?

The MCP4652 utilizes volatile RAM for wiper storage. Wiper settings are lost when power is removed and must be reprogrammed upon restart.