LM4128BQ1MF3.3/NOPB

Voltage Reference Overview

The LM4128BQ1MF3.3/NOPB is an automotive-grade precision micropower series voltage reference from Texas Instruments, housed in a SOT-23-5 package. It provides a fixed output of 3.3V with an initial accuracy of ±0.2%. The device operates within an input voltage range of 3.7V to 5.5V and supports a maximum shunt current of 20 mA. Key electrical specifications include a low temperature coefficient of 75 ppm/°C, a supply current of 60 µA, and noise performance of 310 µVp-p (0.1Hz to 10Hz). It is qualified under AEC-Q100 standards for operation between -40°C and +125°C.

Voltage Reference Feature Summary

• Automotive qualification compliant with AEC-Q100 standards
• Micropower consumption with 60 µA supply current
• High precision with ±0.2% initial accuracy
• Integrated enable pin for low-power shutdown

Voltage Reference Applications

• Automotive data acquisition systems
• Battery-powered instrumentation
• Precision analog-to-digital converter references
• Microcontroller power supply monitoring

Voltage Reference Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free compliance and RoHS adherence as per Texas Instruments documentation. Confirm the 'BQ1' designation aligns with required automotive reliability grades. Ensure the SOT-23-5 footprint matches the target PCB design constraints. Cross-reference the datasheet revision date to ensure compatibility with latest thermal and electrical specifications before finalizing procurement orders.

Voltage Reference Selection Notes

Select this component when a fixed 3.3V reference is required in space-constrained automotive applications. The SOT-23-5 package offers a compact solution compared to larger packages. Consider the 60 µA quiescent current for battery life optimization. The ±0.2% accuracy is suitable for general-purpose precision tasks, while the 75 ppm/°C coefficient ensures stability across wide industrial temperature ranges.

Voltage Reference Part Context

This part belongs to the LM4128 family of precision micropower series voltage references. The 'Q1' suffix denotes automotive grade qualification, distinguishing it from commercial variants. The 'B' indicates the specific accuracy bin (±0.2%), while '3.3' specifies the fixed output voltage. The 'NOPB' suffix confirms non-phosphorus lead-free packaging.

Voltage Reference Replacement Considerations

LM4128AQ1MF3.3/NOPB: Commercial grade alternative with similar electrical characteristics but without automotive qualification.