LM4128CQ1MF3.3/NOPB

Voltage Reference Overview

The LM4128CQ1MF3.3/NOPB is an automotive-grade series voltage reference IC manufactured by Texas Instruments, housed in a SOT-23-5 surface-mount package. It provides a fixed output voltage of 3.3 V with an initial accuracy tolerance of ±0.5%. The device operates within a junction temperature range of -40°C to +125°C and is qualified under the AEC-Q100 standard for automotive applications. Key electrical specifications include a maximum shunt current of 20 mA, a supply current of 100 µA, and a temperature coefficient of 100 ppm/°C. The input voltage range extends from 3.4 V to 5.5 V, supporting stable regulation in power management systems.

Voltage Reference Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability in vehicle electronics
• High precision series voltage reference architecture ensuring stable output regulation
• Low power consumption design suitable for battery-operated and energy-efficient applications

Voltage Reference Applications

• Automotive electronic control units requiring precise voltage references
• Data acquisition systems utilizing analog-to-digital converters
• Portable instrumentation powered by single-cell batteries

Voltage Reference Procurement Notes

Verify the complete part number including suffixes such as NOPB and packaging options like TR or CT against official Texas Instruments documentation. Confirm AEC-Q100 qualification status and specific lot traceability requirements for automotive compliance. Ensure compatibility with intended operating temperature ranges and input voltage constraints before finalizing procurement orders.

Voltage Reference Selection Notes

Select this component when a fixed 3.3 V reference with ±0.5% accuracy is required in automotive environments. Consider the 100 ppm/°C temperature coefficient and 100 µA supply current for power-sensitive designs. Verify that the 3.4 V minimum input voltage aligns with the system's available supply rails and that the SOT-23-5 footprint fits the PCB layout constraints.

Voltage Reference Part Context

This device belongs to the LM4128 family of micropower shunt voltage references designed for high-precision applications. The 'C' designation indicates a ±0.5% initial accuracy grade, while 'Q1' signifies automotive qualification. The 'MF' suffix denotes the SOT-23-5 package type, and '3.3' specifies the fixed 3.3 V output voltage. This variant integrates industry-standard performance metrics optimized for space-constrained automotive and industrial modules.

Voltage Reference FAQ

What is the minimum input voltage required for proper regulation?

The LM4128CQ1MF3.3/NOPB requires a minimum input voltage of 3.4 V to maintain accurate regulation of its 3.3 V output.

Is this component suitable for harsh automotive environments?

Yes, it is qualified to AEC-Q100 standards and operates reliably across a junction temperature range of -40°C to +125°C.