LM4128CMFX-4.1/NOPB

Voltage Reference Overview

The LM4128CMFX-4.1/NOPB is a precision micropower shunt voltage reference from Texas Instruments, housed in a SOT-23-5 surface-mount package. It provides a fixed output voltage of 4.096 V with an initial accuracy of 1%. The device operates within a temperature range of -40°C to +125°C and features a temperature coefficient of 100 ppm/°C. Maximum input voltage is 6 V, with a maximum shunt current of 20 mA.

Voltage Reference Feature Summary

• Provides stable series precision reference voltage
• Operates at micropower levels for efficiency
• Designed for compact surface-mount integration

Voltage Reference Applications

• Portable instrumentation circuits
• Battery-powered measurement systems
• Data acquisition signal conditioning

Voltage Reference Procurement Notes

Verify the specific suffix 'CMFX' against official Texas Instruments documentation to confirm tape-and-reel packaging and exact marking codes. Ensure the component meets RoHS compliance requirements for your assembly process. Cross-reference the full part number with the manufacturer's current datasheet to validate availability and any recent design changes or obsolescence notices before finalizing procurement plans.

Voltage Reference Selection Notes

Select this component when a 4.096 V reference is required in space-constrained designs. The SOT-23-5 package offers a small footprint suitable for portable electronics. Consider the 1% initial accuracy and 100 ppm/°C temperature coefficient against application tolerance needs. Verify that the 20 mA maximum shunt current capability aligns with the circuit's load requirements.

Voltage Reference Part Context

This part belongs to the LM4128 family of micropower series voltage references. The family includes various fixed output voltages and accuracy grades. The 'C' grade typically denotes commercial temperature range specifications, while 'NOPB' indicates lead-free construction without lead-based plating options.

Voltage Reference Replacement Considerations

Check for direct equivalents such as other LM4128 variants with different output voltages or accuracies. Verify pinout compatibility if substituting with similar SOT-23-5 references from other manufacturers.