MCP4352-503E/ST

Digital Potentiometers Overview

The MCP4352-503E/ST is a quad rheostat digital potentiometer IC from Microchip Technology, featuring volatile memory and an SPI serial interface. It provides four independent resistor networks with 8-bit resolution (257 taps) and a nominal resistance of 50 kΩ. The device operates within a supply voltage range of 1.8V to 5.5V, supporting high-voltage tolerant digital inputs up to 12.5V. Key electrical characteristics include a typical wiper resistance of 75 Ω, a bandwidth of 200 kHz for the 50 kΩ variant, and an operating temperature range of -40°C to +125°C.

Digital Potentiometers Feature Summary

• Quad Rheostat Configuration: Four independent variable resistors with 8-bit resolution (256 steps).
• SPI Interface: Supports high-speed read/write operations at frequencies up to 10 MHz.
• High-Voltage Tolerant Inputs: Digital control pins tolerate voltages up to 12.5V.
• Terminal Disconnect: Features a Terminal Control (TCON) register to disconnect resistor network terminals.

Digital Potentiometers Applications

• Variable gain amplifiers in audio processing circuits.
• Programmable biasing networks for analog sensors.
• Adjustable reference voltage generation in mixed-signal systems.
• Impedance matching networks in RF applications.

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature grade. Ensure that the volatile memory characteristic aligns with system power-loss requirements, as settings are not retained without power. Cross-reference the datasheet revision number to confirm compatibility with design specifications.

Digital Potentiometers Selection Notes

Select this component when a quad rheostat configuration is required rather than a potentiometer setup. The 50 kΩ resistance value suits moderate impedance applications. Consider the 1.8V minimum supply voltage for low-power designs. Verify that the 200 kHz bandwidth meets the signal frequency requirements of the target application.

Digital Potentiometers Part Context

This part belongs to the MCP433X/435X family of quad SPI digital potentiometers. Unlike the MCP4351, which is configured as a potentiometer, the MCP4352 is specifically designed as a rheostat. It shares the same 8-bit resolution and volatile memory architecture but differs in terminal configuration options suitable for two-terminal variable resistance applications.

Digital Potentiometers Replacement Considerations

The MCP4351-503E/ST is a functional substitute if the application requires a potentiometer configuration instead of a rheostat, provided external connections are adjusted accordingly. Other family members like the MCP4332 offer lower 7-bit resolution.