MCP4232T-502E/UN

Digital Potentiometers Overview

The MCP4232T-502E/UN is a dual rheostat digital potentiometer from Microchip Technology, featuring volatile memory and an SPI serial interface. It provides two independent resistor networks with 7-bit resolution (129 steps) and a nominal resistance of 5 kΩ. The device operates within a supply voltage range of 1.8V to 5.5V and supports high-voltage tolerant digital inputs up to 12.5V. Key electrical characteristics include a typical wiper resistance of 75 Ω, a bandwidth of 2 MHz for the 5 kΩ configuration, and an operating temperature range of -40°C to +125°C.

Digital Potentiometers Feature Summary

• Dual Rheostat Configuration: Contains two independent 5 kΩ resistor networks with 7-bit resolution (129 taps).
• SPI Interface: Supports standard SPI modes 0,0 and 1,1 with clock frequencies up to 10 MHz at VDD ≥ 2.7V.
• High-Voltage Tolerant Inputs: Digital control pins (CS, SCK, SDI, SHDN) tolerate voltages up to 12.5V.
• Low Power Consumption: Typical standby current is 2.5 µA when the serial interface is inactive.

Digital Potentiometers Applications

• Variable gain control in audio and instrumentation amplifier circuits.
• Programmable biasing and reference voltage adjustment in sensor interfaces.
• Digital trimming of analog signal paths requiring remote resistance adjustment.

Digital Potentiometers Procurement Notes

Verify the ordering suffix 'UN' corresponds to the MSOP-10 package as specified in the datasheet. Confirm that the '-502' suffix indicates the 5 kΩ resistance value. Ensure the 'T' designation matches the required reel packaging quantity. Cross-reference the specific revision level against the latest Microchip documentation to confirm pinout compatibility.

Digital Potentiometers Selection Notes

Select this component when a dual-channel variable resistance is required without non-volatile storage. The 7-bit resolution offers 129 discrete steps, suitable for applications where fine granularity is not critical. Verify that the system logic levels are compatible with the SPI interface or utilize the high-voltage tolerant inputs if interfacing with higher voltage controllers.

Digital Potentiometers Part Context

This part belongs to the MCP413X/415X/423X/425X family of single and dual SPI digital potentiometers. Unlike the MCP4242 series which features non-volatile memory, the MCP4232 utilizes volatile RAM for wiper settings, meaning the position resets upon power loss. It shares the same physical footprint and command set as other devices in the MCP42XX series for easy design migration.

Digital Potentiometers Replacement Considerations

Direct pin-compatible replacements within the same family include the MCP4231 (dual potentiometer) or MCP4252 (8-bit resolution). For single-channel applications, the MCP4132 serves as a functional substitute. Ensure the replacement maintains the 5 kΩ resistance value and the MSOP-10 package form factor.