LM4128BQ1MFX3.3/NOPB

Voltage Reference Overview

The LM4128BQ1MFX3.3/NOPB is an automotive-grade precision micropower shunt voltage reference manufactured by Texas Instruments. It delivers a fixed output voltage of 3.3 V with an initial accuracy of 0.2% and a temperature coefficient of 75 ppm/°C. The device operates within a supply voltage range up to 6 V and draws a typical quiescent current of 60 µA. Designed for reliability in harsh environments, it supports an operating temperature range from -40°C to +125°C and holds AEC-Q100 qualification. The component is housed in a compact SOT-23-5 surface-mount package, suitable for space-constrained PCB layouts.

Voltage Reference Feature Summary

• Automotive-grade reliability certified under AEC-Q100 standards for extended temperature operation
• High precision performance with 0.2% initial accuracy and low temperature drift
• Micropower consumption design enabling efficient battery-operated applications

Voltage Reference Applications

• Automotive electronic control units requiring stable reference voltages
• Portable instrumentation and measurement devices
• Data acquisition systems with high-resolution analog-to-digital converters

Voltage Reference Procurement Notes

Verify the specific suffix 'X' indicates tape-and-reel packaging configuration when ordering. Confirm that the AEC-Q100 qualification aligns with your automotive project requirements. Ensure input voltage remains within the specified maximum limit to maintain regulation. Check for RoHS compliance documentation if environmental regulations apply to your manufacturing process.

Voltage Reference Selection Notes

Select this component when automotive certification and high precision are mandatory. The 3.3 V output suits digital logic interfaces directly. Consider the 60 µA current draw for power-sensitive designs. The SOT-23-5 package offers a small footprint compared to larger through-hole alternatives. Evaluate thermal management needs given the wide operating temperature range.

Voltage Reference Part Context

This part belongs to the LM4128 family of precision shunt voltage references. The 'BQ1' designation typically denotes automotive qualification and specific accuracy grades within the series. It complements other variants offering different fixed output voltages such as 2.5 V or 4.096 V while maintaining similar electrical characteristics and package options.

Voltage Reference Replacement Considerations

LM4128BQ1MF3.3/NOPB serves as a direct non-suffix equivalent for bulk or cut-tape procurement.