MCP4142-103E/MS

Digital Potentiometers Overview

The MCP4142-103E/MS is a single-channel digital rheostat manufactured by Microchip Technology. It features a nominal resistance of 10 kΩ with a tolerance of ±20% and utilizes WiperLock™ non-volatile memory to retain settings. The device operates on an SPI serial interface at frequencies up to 10 MHz and supports a supply voltage range of 2.7V to 5.5V. It provides 128 taps (7-bit resolution) and includes high-voltage tolerant digital inputs capable of withstanding up to 12.5V.

Digital Potentiometers Feature Summary

• WiperLock™ Non-Volatile Memory: Retains wiper settings via EEPROM after power loss.
• High-Voltage Tolerant Inputs: Digital pins tolerate voltages up to 12.5V.
• SPI Interface: Supports standard modes 0,0 and 1,1 with clock speeds up to 10 MHz.
• Rheostat Configuration: Single resistor network with 128 adjustable steps.

Digital Potentiometers Applications

• Industrial process control systems requiring remote resistance adjustment.
• Sensor biasing circuits needing programmable gain or offset calibration.
• Audio equipment for electronic volume or tone control.
• Power supply feedback loops for dynamic regulation.

Digital Potentiometers Procurement Notes

Verify the specific suffix 'MS' corresponds to the MSOP-8 package when sourcing. Confirm that the application environment remains within the specified -40°C to +125°C operating temperature range. Ensure the SPI controller supports the required voltage levels for the high-voltage tolerant inputs if VDD is below 12.5V.

Digital Potentiometers Selection Notes

Select this model over potentiometer variants (e.g., MCP4141) when a variable two-terminal resistor is required rather than a three-terminal voltage divider. Consider the MCP4162 series if 8-bit (256-step) resolution is necessary instead of the 7-bit resolution provided here. Verify that the 10 kΩ nominal value aligns with the target circuit impedance requirements.

Digital Potentiometers Part Context

This component belongs to the MCP414X family of single-channel digital potentiometers. It shares architectural similarities with the MCP424X dual-channel series but integrates only one resistor network. The device is part of Microchip's broader portfolio of SPI-controlled analog switches and converters designed for embedded system calibration.

Digital Potentiometers Replacement Considerations

Direct functional replacements include the MCP4142-103E/SO (SOIC-8 package) and MCP4142-103E/P (PDIP-8 package). For surface-mount applications requiring identical pinouts, the MSOP-8 variant is the primary alternative form factor within the same electrical specification set.