LM4128CMFX-3.3/NOPB

Voltage Reference Overview

The LM4128CMFX-3.3/NOPB is a precision micropower series voltage reference manufactured by Texas Instruments, housed in a compact SOT-23-5 surface-mount package. It delivers a fixed output voltage of 3.3V with an initial accuracy of ±0.5%. The device operates within a supply voltage range of 3.7V to 5.5V and supports a maximum shunt current of 20mA. Key electrical specifications include a temperature coefficient of 100ppm/°C and a quiescent current of 60µA. Noise performance is rated at 310µVp-p across the 0.1Hz to 10Hz frequency band. The component is designed for reliable operation across an extended industrial temperature range from -40°C to +125°C.

Voltage Reference Feature Summary

• Provides stable fixed voltage output with high initial accuracy
• Features low power consumption suitable for battery-powered applications
• Offers robust noise performance for sensitive analog circuits
• Designed for compact surface-mount integration

Voltage Reference Applications

• Precision measurement systems requiring stable reference voltages
• Battery-powered instrumentation and portable devices
• Data acquisition systems and sensor signal conditioning
• Calibration equipment and test instruments

Voltage Reference Procurement Notes

Verify that the ordering suffix matches the exact part number configuration required for your design. Confirm the specific tolerance grade and packaging format aligns with your manufacturing process. Ensure compatibility with your PCB footprint and thermal management requirements. Cross-reference the datasheet for any recent product changes or qualification updates before finalizing procurement plans.

Voltage Reference Selection Notes

Select this component when a fixed 3.3V reference with ±0.5% accuracy is required in a small form factor. Consider the 60µA quiescent current for power-sensitive designs. Evaluate the 100ppm/°C temperature coefficient against your system's thermal stability needs. Ensure the input voltage remains within the specified 3.7V to 5.5V range for proper regulation.

Voltage Reference Part Context

This part belongs to the LM4128 family of micropower series voltage references from Texas Instruments. The family includes various output voltages and accuracy grades, such as the LM4128BMF and LM4128AQ1MF variants. These components share similar pinouts and operational principles but differ in initial accuracy, temperature coefficients, and automotive qualification status.

Voltage Reference Replacement Considerations

Direct substitutes include other LM4128 variants with matching 3.3V output and SOT-23-5 packaging, such as LM4128CMF-3.3/NOPB. Verify that alternative parts meet the same accuracy, temperature coefficient, and current specifications to ensure circuit compatibility.