LM4128CMF-4.1

Voltage Reference Overview

The LM4128CMF-4.1 is a precision micropower series voltage reference from Texas Instruments, housed in an SOT-23-5 package. It provides a fixed output voltage of 4.096 V with an initial accuracy of ±0.5% and a temperature coefficient of 100 ppm/°C. The device operates within a junction temperature range of -40°C to +125°C and features a typical supply current of 60 µA. It supports up to 20 mA load current and includes an enable pin for shutdown mode.

Voltage Reference Feature Summary

• Series topology design eliminates the need for external stabilizing capacitors while ensuring stability with capacitive loads up to 10 µF.
• Low quiescent current consumption enables efficient operation in battery-powered applications.
• Integrated enable pin allows for a low-power shutdown mode to minimize energy usage when inactive.

Voltage Reference Applications

• Precision regulators
• Data acquisition systems
• Portable, battery-powered equipment

Voltage Reference Procurement Notes

Verify that the ordering suffix matches the required tolerance and packaging specifications. Confirm the component grade corresponds to the necessary accuracy and temperature coefficient for the specific application environment. Ensure compatibility with the target PCB footprint and soldering process requirements.

Voltage Reference Selection Notes

Select this part when a fixed 4.096 V reference is required in a space-constrained surface-mount design. Consider the C-grade specifications if higher precision is not critical. Evaluate the dropout voltage requirements against the available input supply headroom to ensure stable regulation under all operating conditions.

Voltage Reference Part Context

This component belongs to the LM4128 family of micropower series voltage references. It shares the same SOT-23-5 form factor and core architecture as other variants in the series, differing primarily in output voltage options and accuracy grades. The family is designed for applications requiring low power consumption and high stability.

Voltage Reference Replacement Considerations

LM4128CMFX-4.1/NOPB