MCP4531-104E/MS

Digital Potentiometers Overview

The MCP4531-104E/MS is a single-channel digital potentiometer featuring an I2C serial interface and volatile memory. It provides a 7-bit resolution with 129 taps and a nominal resistance of 100 kΩ. The device operates on a supply voltage ranging from 1.8V to 5.5V, supporting I2C clock frequencies up to 3.4 MHz. Key electrical characteristics include a typical wiper resistance of 75 Ω, a temperature coefficient of 150 ppm/°C over the extended range, and high-voltage tolerant digital inputs up to 12.5V. It is housed in an MSOP-8 package.

Digital Potentiometers Feature Summary

• I2C Serial Interface: Supports Standard (100 kHz), Fast (400 kHz), and High-Speed (up to 3.4 MHz) modes for efficient data transfer.
• 7-Bit Resolution: Offers 129 discrete tap positions for precise resistance adjustment within the 100 kΩ network.
• High-Voltage Tolerance: Digital input pins tolerate voltages up to 12.5V, allowing compatibility with higher voltage logic levels.
• Wide Operating Voltage: Functional operation supported from 1.8V to 5.5V, with specified device characteristics from 2.7V to 5.5V.

Digital Potentiometers Applications

• Programmable gain amplifiers requiring remote resistance adjustment
• Sensor biasing circuits needing calibrated offset control
• Voltage reference trimming in measurement systems

Digital Potentiometers Procurement Notes

Verify the specific suffix 'E' indicates RoHS compliance and the '/MS' denotes the MSOP-8 package. Confirm that the '104' code corresponds to the 100 kΩ resistance value. Ensure the design accounts for volatile memory behavior, as settings are lost upon power removal. Check I2C bus speed requirements against the device's AC timing specifications.

Digital Potentiometers Selection Notes

Select this component when a single-channel, non-volatile-free digital potentiometer is required. The 100 kΩ value suits applications needing moderate impedance levels. Consider the 7-bit resolution if 129 steps provide sufficient granularity. Verify that the 1.8V minimum operating voltage meets the system's low-power requirements. Note that the device lacks WiperLock™ technology found in other family members.

Digital Potentiometers Part Context

This part belongs to the MCP453X series, which features volatile RAM-based storage for wiper settings. Unlike the MCP454X or MCP456X series, it does not retain settings after power loss. It is functionally similar to the MCP4532 but configured as a potentiometer rather than a rheostat. The MSOP-8 package offers a compact footprint suitable for space-constrained PCB designs.

Digital Potentiometers Replacement Considerations

Direct substitutes within the same family include the MCP4531-103E/MS (10 kΩ) or MCP4531-503E/MS (50 kΩ) for different resistance values. For non-volatile retention, consider the MCP4541-104E/MS. For higher resolution, the MCP4551-104E/MS provides 8-bit (257 tap) performance.