MCP4231-502E/P

Digital Potentiometers Overview

The MCP4231-502E/P is a dual-channel digital potentiometer manufactured by Microchip Technology. It features two independent 7-bit resistor networks, providing 128 taps and 129 resistance steps per channel. The nominal end-to-end resistance (R_AB) is 5 kΩ with a ±20% tolerance. The device operates on a single supply voltage ranging from 1.8V to 5.5V and utilizes an SPI serial interface for control. It employs volatile memory, resetting wiper positions to mid-scale upon power-up or brown-out events.

Digital Potentiometers Feature Summary

• Dual Potentiometer Configuration: Contains two independent 7-bit resistor networks with 129 steps each.
• SPI Interface: Supports high-speed read/write operations at frequencies up to 10 MHz in modes 0,0 and 1,1.
• High-Voltage Tolerant Inputs: Digital inputs (CS, SCK, SDI, SHDN) tolerate voltages up to 12.5V.
• Extended Temperature Range: Rated for operation from -40°C to +125°C.

Digital Potentiometers Applications

• Audio volume control and tone adjustment circuits
• Programmable gain amplifiers and variable attenuators
• Voltage reference trimming and calibration
• Sensor bias adjustment

Digital Potentiometers Procurement Notes

Verify the package type matches the 'P' suffix, indicating a 14-pin Plastic Dual In-Line Package (PDIP). Confirm the resistance value corresponds to the '502' suffix, representing 5 kΩ. Ensure the 'E' suffix indicates compliance with RoHS standards and absence of halogenated flame retardants. Check datasheet DS22060B for specific ordering details.

Digital Potentiometers Selection Notes

Select this component when a dual-channel digital potentiometer with 5 kΩ resistance is required. The 7-bit resolution provides 128 steps, suitable for applications not requiring fine 8-bit granularity. The volatile memory requires external retention if power loss persistence is needed. High-voltage tolerant inputs allow direct interfacing with 5V logic even if the analog supply is lower.

Digital Potentiometers Part Context

This part belongs to the MCP413X/415X/423X/425X family of SPI digital potentiometers. The '42' prefix denotes a dual resistor network, while '3' indicates 7-bit resolution (128 steps). The '1' suffix specifies a potentiometer configuration. Other variants include single-pot models (MCP4131) and 8-bit resolutions (MCP4251).

Digital Potentiometers Replacement Considerations

Direct replacements within the same family include MCP4231-502E/SL (SOIC package) or MCP4231-502E/ST (TSSOP package) for surface mount alternatives. For single-channel needs, MCP4131-502E/P may be used if only one pot is required. Cross-family replacement with non-volatile versions like MCP4241 requires checking for different operating voltage ranges (2.7V min vs 1.8V min).