LM4120IM5-4.1/NOPB

Voltage Reference Overview

The LM4120IM5-4.1/NOPB is a precision micropower low dropout voltage reference manufactured by Texas Instruments, featuring a fixed output of 4.1V. It operates within an input voltage range of 2V to 12V and delivers up to 5mA of output current with an initial accuracy of ±0.5%. The device exhibits a temperature coefficient of 50ppm/°C and maintains line regulation at 0.008%/V and load regulation at 0.12%/mA. Designed for surface-mount applications, it utilizes a compact SOT-23 package with five pins, supporting operation across a temperature range of -40°C to +85°C.

Voltage Reference Feature Summary

• Provides stable precision voltage referencing in a micropower architecture suitable for battery-operated systems
• Features low dropout capability allowing efficient operation from supply voltages close to the reference output
• Delivers high initial accuracy and low temperature drift for maintaining signal integrity in measurement circuits

Voltage Reference Applications

• Portable instrumentation requiring precise analog-to-digital conversion references
• Battery-powered data acquisition systems needing stable voltage benchmarks
• Medical equipment utilizing accurate sensor signal conditioning

Voltage Reference Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for specific lot traceability requirements. Ensure the ordering suffix matches the exact pinout and tolerance specifications required for your design. Review datasheet revisions for any updates to electrical characteristics or packaging details before finalizing procurement orders.

Voltage Reference Selection Notes

Select this component when a fixed 4.1V reference is needed with moderate precision and low power consumption. Consider the SOT-23-5 package constraints for PCB layout space. Evaluate thermal management needs as the device dissipates power based on the difference between input and output voltages multiplied by the shunt current. Ensure the input voltage remains within the specified operational limits to maintain regulation.

Voltage Reference Part Context

This part belongs to the LM4120 family of precision micropower voltage references from Texas Instruments. The series offers various fixed output voltages and accuracy grades, including the AI grade for tighter tolerances. The LM4120IM5 variant specifically denotes the industrial temperature range and SOT-23 packaging, providing a balance of performance and size for general-purpose electronic designs.

Voltage Reference Replacement Considerations

Direct substitutes include other LM4120 variants with different output voltages or accuracy grades, such as the LM4120AIM5 series. Cross-reference with similar micropower references from other manufacturers if pin compatibility and electrical parameters align. Verify that alternative components meet the same temperature range and package footprint requirements.