LM4128AMF-2.5/NOPB

Voltage Reference Overview

The LM4128AMF-2.5/NOPB is a precision micropower shunt voltage reference manufactured by Texas Instruments, housed in a SOT-23-5 surface-mount package. It provides a fixed output voltage of 2.5 V with an initial accuracy of 0.1%. The device operates within a temperature range of -40°C to +125°C and features a maximum series input voltage of 6 V. Its quiescent current is 60 µA, and it supports a maximum shunt current of 20 mA.

Voltage Reference Feature Summary

• Provides high-precision voltage regulation with 0.1% initial accuracy for sensitive analog circuits.
• Operates efficiently at low power consumption with a 60 µA supply current.
• Designed for wide industrial temperature stability across -40°C to +125°C.

Voltage Reference Applications

• Portable instrumentation requiring low power consumption
• Battery-powered measurement systems
• Data acquisition signal conditioning

Voltage Reference Procurement Notes

Verify the specific suffix 'AMF' corresponds to the required accuracy grade (0.1%) and tape-and-reel packaging configuration. Confirm that the SOT-23-5 footprint matches the design layout. Ensure the 6 V maximum input voltage rating aligns with the system supply rails to prevent device damage during operation.

Voltage Reference Selection Notes

Select this component when a stable 2.5 V reference is needed with tight tolerance requirements. The 0.1% accuracy distinguishes it from lower-grade variants like the B or C versions. Consider the 60 µA current draw suitable for battery life constraints compared to higher-current references.

Voltage Reference Part Context

This part belongs to the LM4128 family of micropower shunt references. It shares the same pinout and basic topology as other variants but offers superior initial accuracy. The family is designed for applications where space and power are critical constraints while maintaining reference stability.

Voltage Reference Replacement Considerations

LM4128BMF-2.5/NOPB offers similar functionality with 0.2% accuracy. LM4128DMFX-2.5/NOPB provides 1% accuracy. Verify if the relaxed tolerance of these alternatives meets the circuit requirements before substitution.