LM4128AMF-2.5

Voltage Reference Overview

The LM4128AMF-2.5/NOPB is a precision micropower shunt voltage reference from Texas Instruments, housed in a SOT-23-5 package. It provides a fixed output voltage of 2.5 V with an initial accuracy of 0.1%. The device features a temperature coefficient of 75 ppm/°C and operates within a supply voltage range up to 6 V. Maximum shunt current is 20 mA, with a quiescent current of 60 µA. It functions across an extended temperature range from -40°C to +125°C.

Voltage Reference Feature Summary

• Delivers high-precision voltage regulation with 0.1% initial accuracy for stable reference performance.
• Optimized for low power consumption with a micropower design suitable for battery-operated applications.
• Provides robust thermal stability through a low temperature coefficient of 75 ppm/°C over the operating range.

Voltage Reference Applications

• Portable instrumentation requiring precise voltage references
• Battery-powered measurement systems
• Data acquisition channels

Voltage Reference Procurement Notes

Verify the specific suffix (e.g., NOPB) to confirm lead-free status and RoHS compliance. Ensure the ordering code matches the required accuracy grade and packaging format. Confirm that the SOT-23-5 footprint aligns with the target PCB layout constraints before finalizing procurement.

Voltage Reference Selection Notes

Select this component when a 2.5 V reference is required with tight initial accuracy tolerances. Consider the 6 V maximum input voltage limit and 20 mA shunt current capability against load requirements. Evaluate the 75 ppm/°C drift specification against long-term stability needs in varying thermal environments.

Voltage Reference Part Context

This part belongs to the LM4128 series of micropower shunt references. It shares architectural similarities with other variants in the family but is distinguished by its specific 2.5 V output voltage and A-grade accuracy specifications. The series is designed for compact surface-mount applications.

Voltage Reference Replacement Considerations

LM4128BMF-2.5/NOPB offers similar functionality with slightly relaxed accuracy specifications. LM4128DMFX-2.5/NOPB provides comparable performance in the same package type. Verify pinout compatibility and electrical parameter overlaps before substitution.