MCP4461-104E/ML

Digital Potentiometers Overview

The MCP4461-104E/ML is a quad digital potentiometer IC featuring four independent 8-bit resistor networks with nonvolatile memory. It provides 257 taps for precise resistance adjustment and supports I2C serial communication at speeds up to 3.4 MHz. The device operates on a single supply voltage ranging from 2.7V to 5.5V, with the serial interface functional down to 1.8V. It includes WiperLock technology to retain wiper settings after power loss and offers hardware/software write protection. The component is housed in a compact 4x4mm QFN-20 package.

Digital Potentiometers Feature Summary

• Quad Resistor Network: Four independent potentiometers with 8-bit resolution (257 taps) and linear taper.
• Nonvolatile Memory: Retains wiper settings using WiperLock technology; includes five general-purpose EEPROM locations.
• High-Speed Interface: Supports I2C bus modes including Standard (100 kHz), Fast (400 kHz), and High-Speed (up to 3.4 MHz).
• High-Voltage Inputs: Digital input pins tolerate voltages up to 12.5V, enabling split-rail applications.

Digital Potentiometers Applications

• Precision gain control in audio and instrumentation amplifiers.
• Programmable voltage reference adjustment.
• Digital trimming of analog sensor signals.
• Variable bias current generation in mixed-signal circuits.

Digital Potentiometers Procurement Notes

Verify the specific resistance value suffix '104' corresponds to 100 kΩ when sourcing. Confirm the package marking matches the QFN-20 form factor. Ensure the design accounts for the 2.7V minimum operating voltage for full analog performance, although the interface functions at lower voltages.

Digital Potentiometers Selection Notes

Select this model over volatile variants (e.g., MCP4431) if power-down retention is required. Choose the -104 suffix for 100 kΩ networks; use -103 for 10 kΩ or -503 for 50 kΩ. Verify that the I2C address configuration via the HVC/A0 pin aligns with system bus requirements.

Digital Potentiometers Part Context

This component belongs to the MCP44X series of quad digital potentiometers. It shares the same physical footprint and pinout as the MCP4441 but differs in memory type (EEPROM vs. RAM) and minimum operating voltage (2.7V vs. 1.8V). It serves as the nonvolatile counterpart to the MCP4451 family.

Digital Potentiometers Replacement Considerations

The MCP4441-104E/ML is a direct functional substitute with identical pinout and features, differing only in volatile memory type and lower minimum voltage. The MCP4461-104E/ST is an alternative package option (TSSOP-20) with identical electrical characteristics.