LM4128AMFX-4.1/NOPB

Voltage Reference Overview

The LM4128AMFX-4.1/NOPB is a micropower series voltage reference manufactured by Texas Instruments, designed for precision applications requiring stable output in compact form factors. It delivers a fixed nominal output voltage of 4.096 V with an initial accuracy of 0.1 percent and a temperature coefficient of 75 ppm per degree Celsius. The device operates within a supply voltage range up to 6 V and draws a typical quiescent current of 60 uA. It supports a maximum shunt current of 20 mA and functions reliably across an extended industrial temperature range from -40 C to +125 C. Packaged in a five-pin SOT-23 surface-mount case, it serves as a high-precision reference source for analog circuits.

Voltage Reference Feature Summary

• Provides a fixed 4.096 V output with 0.1% initial accuracy for high-precision signal conditioning
• Features low power consumption with a typical operating current of 60 uA
• Ensures thermal stability with a temperature coefficient of 75 ppm/C over the full operating range
• Utilizes a compact SOT-23-5 package suitable for space-constrained designs

Voltage Reference Applications

• Portable battery-powered instrumentation systems
• Data acquisition and measurement equipment
• Industrial process control loops
• Medical diagnostic devices

Voltage Reference Procurement Notes

Verify the specific suffix 'AMFX' against the manufacturer's latest datasheet to confirm availability status, as this variant may be discontinued or subject to change. Ensure the ordering part number matches the required tolerance and package type exactly. Confirm RoHS compliance details directly with the supplier documentation before finalizing procurement orders.

Voltage Reference Selection Notes

Select this component when a 4.096 V reference with tight 0.1% accuracy is required alongside minimal power draw. The 75 ppm/C drift specification makes it suitable for environments with moderate thermal fluctuations. Compare against the LM4128BMFX-4.1/NOPB if a wider 0.2% tolerance is acceptable for cost reduction. Ensure the application load does not exceed the 20 mA shunt current limit during operation.

Voltage Reference Part Context

This device belongs to the LM4128 family of micropower series voltage references, which are engineered for precision applications where low power consumption and small size are critical. The family includes various output voltages and accuracy grades, all sharing the same core architecture and SOT-23-5 footprint. This specific model represents the highest accuracy tier within the standard voltage options, targeting demanding analog front-end requirements.

Voltage Reference Replacement Considerations

The LM4128BMFX-4.1/NOPB offers a compatible pinout and function with slightly relaxed 0.2% accuracy. The LM4128DMFX-4.1/NOPB provides 1% accuracy at potentially lower cost. Verify that any substitute maintains the 60 uA quiescent current and 75 ppm/C temperature coefficient characteristics to ensure circuit performance remains within design specifications.