MCP4142-104E/MS

Digital Potentiometers Overview

The MCP4142-104E/MS is a single-channel digital rheostat manufactured by Microchip Technology. It features a nominal resistance (RAB) of 100 kΩ with a ±20% tolerance and utilizes non-volatile memory to retain wiper settings. The device operates on a supply voltage range of 2.7V to 5.5V, consuming 450 µA during active serial interface operations. It provides 129 discrete steps via a 7-bit resolution and supports SPI communication at frequencies up to 10 MHz. The component is housed in an 8-pin MSOP package and functions within an extended temperature range of -40°C to +125°C.

Digital Potentiometers Feature Summary

• Non-volatile Memory: Stores wiper settings using EEPROM with WiperLock™ technology for secure calibration retention.
• High-Voltage Inputs: Digital control pins tolerate voltages up to 12.5V, enabling compatibility with higher logic levels.
• SPI Interface: Supports standard SPI modes 0,0 and 1,1 with clock speeds up to 10 MHz for high-speed read/write operations.
• Terminal Disconnect: Includes shutdown pin and TCON register capabilities to disconnect resistor network terminals.

Digital Potentiometers Applications

• Precision gain adjustment in instrumentation amplifier circuits
• Calibration of sensor signal conditioning paths
• Variable attenuation in RF signal chains
• Programmable bias current generation

Digital Potentiometers Procurement Notes

Verify the specific suffix 'MS' confirms the 8-lead Mini Small Outline Package (MSOP). Confirm the '-104' code corresponds to the 100 kΩ resistance value. Ensure the 'E' designation matches the required industrial temperature grade (-40°C to +125°C) for the target application environment.

Digital Potentiometers Selection Notes

Select this model when a single-channel variable resistor configuration is required rather than a potentiometer. The 100 kΩ resistance value suits applications requiring higher impedance networks. Verify that the system logic levels are compatible with the 12.5V tolerant inputs if interfacing with 5V or higher microcontrollers.

Digital Potentiometers Part Context

This component belongs to the MCP414X family of single-channel digital potentiometers featuring non-volatile memory. It shares architectural similarities with the MCP416X series but offers lower 7-bit resolution compared to the 8-bit variants. The device integrates internal weak pull-ups on all digital inputs to simplify circuit design.

Digital Potentiometers Replacement Considerations

The MCP4142-104E/SO serves as a direct pin-compatible alternative in the SOIC-8 package. For applications requiring 8-bit resolution, the MCP4162-104E/MS provides equivalent functionality with increased step count. Cross-reference datasheet electrical characteristics to ensure bandwidth and leakage current requirements are met.