LM4128CQ1MFX3.0/NOPB

Voltage Reference Overview

The LM4128CQ1MFX3.0/NOPB is an automotive-grade series voltage reference IC manufactured by Texas Instruments, designed for precision applications requiring stable output under varying conditions. It features a fixed 3 V output with an initial accuracy of ±0.5% and a temperature coefficient of 100 ppm/°C. The device operates within a supply voltage range of 3.4 V to 5.5 V and supports a maximum shunt current of 20 mA. It consumes only 100 µA of supply current and functions reliably across a junction temperature range of -40°C to +125°C. Packaged in a compact SOT-23-5 surface-mount case, it meets AEC-Q100 qualification standards for automotive reliability.

Voltage Reference Feature Summary

• Automotive-grade reliability certified under AEC-Q100 standards for harsh environment operation
• High precision fixed output with tight initial accuracy tolerance of ±0.5%
• Low power consumption suitable for battery-operated systems with 100 µA supply current
• Compact SOT-23-5 package design optimized for space-constrained printed circuit boards

Voltage Reference Applications

• Automotive sensor signal conditioning circuits
• Data acquisition systems requiring precise voltage references
• Battery-powered instrumentation and monitoring devices
• Microcontroller analog-to-digital converter reference inputs

Voltage Reference Procurement Notes

Verify the specific suffix 'MFX' indicates tape-and-reel packaging configuration when ordering. Confirm that the 'C' grade corresponds to the required ±0.5% accuracy specification for your application. Ensure compatibility with AEC-Q100 requirements if deploying in automotive environments. Check lead times as automotive-grade components may have longer production cycles compared to commercial variants. Validate RoHS compliance status for environmental regulations.

Voltage Reference Selection Notes

Select this component when automotive certification and high precision are mandatory. The 3 V output suits single-supply ADCs and sensors. Consider the 100 ppm/°C drift if operating over wide temperature ranges. The SOT-23-5 package limits thermal dissipation; ensure adequate PCB copper area for heat spreading if handling near-maximum shunt currents. Compare against LM4128DMX variants if lower accuracy or non-automotive use is acceptable.

Voltage Reference Part Context

This part belongs to the LM4128 family of micropower shunt voltage references from Texas Instruments. The 'Q1' designation signifies automotive qualification, while 'C' denotes the ±0.5% accuracy bin. The 'MFX' suffix typically indicates reel packaging. It complements other precision references like the LM4040 series but offers integrated series regulation for improved line regulation performance in low-voltage applications.

Voltage Reference Replacement Considerations

LM4128CQ1MF3.0/NOPB (tray packaging variant)

Voltage Reference FAQ

What is the maximum input voltage for the LM4128CQ1MFX3.0/NOPB?

The maximum recommended input voltage is 5.5 V, although the absolute maximum rating allows up to 6 V.

Does this component meet automotive quality standards?

Yes, it is qualified to AEC-Q100 standards for automotive applications.

What is the typical noise performance of this reference?

The peak-to-peak noise in the 0.1 Hz to 10 Hz frequency range is typically 285 µV.