MCP4351T-103E/ML

Digital Potentiometers Overview

The MCP4351T-103E/ML is a quad digital potentiometer IC featuring four independent 8-bit resistor networks with volatile memory. It offers a nominal resistance of 10 kΩ and provides 257 taps for precise adjustment. The device operates on an SPI serial interface supporting up to 10 MHz at VDD levels between 2.7V and 5.5V, while remaining functional down to 1.8V. Key electrical characteristics include a typical wiper resistance of 75 Ω, low temperature coefficients (50 ppm/°C absolute), and high-voltage tolerant digital inputs up to 12.5V.

Digital Potentiometers Feature Summary

• Quad Resistor Network: Four independent 8-bit potentiometers providing 257 taps each.
• 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

• Programmable gain amplifiers requiring precise analog signal attenuation.
• Voltage reference trimming in precision measurement systems.
• Audio volume control circuits utilizing the low distortion characteristics.
• Adjustable filter cutoff frequency tuning in signal processing chains.

Digital Potentiometers Procurement Notes

Verify the specific package variant against the datasheet, as the 'ML' suffix typically denotes a QFN package, though the provided text references TSSOP options for the family. Confirm that the volatile memory type aligns with system power-loss requirements, as settings are lost upon power cycle. Ensure the SPI controller supports the required clock speeds and modes (0,0 or 1,1).

Digital Potentiometers Selection Notes

Select this component when four independent digital pots are needed within a single package. The 8-bit resolution (257 taps) suits applications requiring finer granularity than 7-bit devices. Verify that the 10 kΩ resistance value matches the circuit impedance requirements. Consider the 75 Ω wiper resistance impact on signal integrity if driving high-impedance loads.

Digital Potentiometers Part Context

This part belongs to the MCP43X series of quad digital potentiometers from Microchip Technology. It shares the same pinout and core architecture as the MCP4331 (7-bit) and MCP4341 (non-volatile) variants but distinguishes itself through its 8-bit resolution and volatile RAM storage. It is designed for applications requiring multiple adjustable resistors without mechanical wear.

Digital Potentiometers Replacement Considerations

For lower resolution needs, the MCP4331T-103E/ML offers identical pinouts with 7-bit resolution. For non-volatile retention, the MCP4341T-103E/ML provides EEPROM storage. Single-channel equivalents include the MCP4131 or MCP4251 families depending on interface requirements.