MCP4141T-103E/SN

Digital Potentiometers Overview

The MCP4141T-103E/SN is a single-channel digital potentiometer IC from Microchip Technology, featuring WiperLock™ non-volatile memory. It provides 129 resistance steps (7-bit resolution) with a nominal total resistance of 10 kΩ and a linear taper. The device operates on a supply voltage range of 2.7V to 5.5V for full specifications, supporting operation down to 1.8V for the serial interface only. It utilizes a high-speed SPI interface capable of up to 10 MHz at VDD ≥ 2.7V. Key electrical characteristics include a typical wiper resistance of 75 Ω, a temperature coefficient of 150 ppm/°C over the extended range, and an inactive current of 2.5 µA.

Digital Potentiometers Feature Summary

• WiperLock™ Non-Volatile Memory: Stores wiper settings in Data EEPROM for automatic recall upon power-up.
• High-Voltage Tolerant Inputs: Digital inputs (CS, SCK, SDI, WP) tolerate voltages up to 12.5V, enabling split-rail applications.
• SPI Interface: Supports standard SPI modes 0,0 and 1,1 with frequencies up to 10 MHz.
• Terminal Disconnect: Features a Shutdown pin (SHDN) and Terminal Control (TCON) register to disconnect resistor network terminals.

Digital Potentiometers Applications

• Gain control in audio and instrumentation circuits
• Voltage reference adjustment
• Programmable filters and oscillators
• Calibration of analog sensor signals

Digital Potentiometers Procurement Notes

Verify the 'T' suffix indicates tape-and-reel packaging when ordering. Confirm the 'SN' suffix corresponds to the 8-lead SOIC package. Ensure the design supports the 12.5V tolerance on digital pins if interfacing with higher voltage logic levels without level shifting.

Digital Potentiometers Selection Notes

Select this component for single-channel applications requiring persistent resistance settings after power loss. Compare with the MCP4151 if volatile RAM storage or 8-bit (257-step) resolution is sufficient and non-volatility is not required. Verify that the 10 kΩ resistance value aligns with the target circuit impedance requirements.

Digital Potentiometers Part Context

This part belongs to the MCP414X family, which includes variants with different resolutions (7-bit vs 8-bit) and channel counts (single vs dual). The MCP4141 specifically denotes the single-potentiometer, 7-bit, non-volatile version. It shares the same datasheet (DS22059B) with related devices like the MCP4161 and MCP4241.

Digital Potentiometers Replacement Considerations

Direct functional substitutes within the same family include the MCP4141-103E/SN (tube packaging) or MCP4141-103E/MS (MSOP package). For higher resolution, the MCP4161-103E/SN offers 8-bit resolution with similar non-volatile features.