MCP4231-104E/ML

Digital Potentiometers Overview

The MCP4231-104E/ML is a dual-channel digital potentiometer IC featuring two independent 7-bit resistor networks. It utilizes an SPI serial interface for high-speed read and write operations to wiper registers. The device offers a nominal resistance (R_AB) of 100 kΩ with a tolerance of ±20% and provides 129 discrete steps. It operates on a single supply voltage ranging from 1.8V to 5.5V, with digital inputs tolerant up to 12.5V. The unit employs volatile memory to store wiper settings and supports both potentiometer and rheostat configurations.

Digital Potentiometers Feature Summary

• Dual 7-bit resistor networks providing 129 taps per channel
• SPI serial interface supporting modes 0,0 and 1,1 at frequencies up to 10 MHz
• High-voltage tolerant digital inputs capable of withstanding up to 12.5V
• Wide operating voltage range from 1.8V to 5.5V

Digital Potentiometers Applications

• Gain control in audio and instrumentation circuits
• Programmable voltage references and biasing networks
• Digital trimming of analog signal paths
• Adjustable filter cutoff frequency selection

Digital Potentiometers Procurement Notes

Verify the package designation 'ML' corresponds to the specific QFN footprint required for the PCB layout. Confirm that the system design accommodates the volatile nature of the wiper memory, ensuring power loss results in a reset to the mid-scale position. Ensure the host controller supports the required SPI clock speeds and protocol modes.

Digital Potentiometers Selection Notes

Select this component when dual independent channels are required within a compact form factor. The 100 kΩ resistance value is suitable for low-power applications where higher impedance minimizes current draw. Verify that the 1.8V minimum supply voltage meets the lowest system rail requirements. Consider the exposed thermal pad if significant power dissipation is anticipated in the application.

Digital Potentiometers Part Context

This part belongs to the MCP413X/415X/423X/425X family of digital potentiometers. The 'MCP4231' designation indicates a dual potentiometer configuration with 7-bit resolution. The suffix '104' specifies the 100 kΩ resistance value, while '/ML' identifies the 16-lead QFN package type.

Digital Potentiometers Replacement Considerations

Direct functional replacements include other MCP4231 variants with different packages such as MCP4231-104E/ST or MCP4231-104E/P. For non-dual applications, the single-channel MCP4131-104E series may be used if pin compatibility allows.