LM103H-3.0

Overview

The LM103H-3.0 is a precision micropower voltage reference manufactured by National Semiconductor, now part of Texas Instruments. It utilizes the reverse punch-through characteristic of double-diffused transistors combined with active circuitry to establish a stable breakdown voltage. This device provides a fixed output voltage of 3.0V and is designed for applications requiring high accuracy and low power consumption in battery-operated systems.

Feature Summary

• Utilizes reverse punch-through transistor technology for stable voltage generation
• Designed as a micropower reference for low energy consumption
• Provides a fixed precision output voltage

Applications

• Battery-powered instrumentation
• Precision analog-to-digital converter references
• Portable measurement devices

Procurement Notes

Verify the manufacturer lineage from National Semiconductor to Texas Instruments when sourcing this component. Confirm that the specific suffix indicates the 3.0V fixed output variant. Ensure compatibility with existing PCB footprints and thermal requirements for the package type used in your design.

Selection Notes

Select this component when a fixed 3.0V reference is required with minimal quiescent current. Consider the operating temperature range and initial accuracy specifications relative to your system's tolerance. Evaluate package availability and lead times given the legacy status of the original National Semiconductor product line.

Part Context

The LM103 series represents a family of micropower voltage references known for their stability and low power usage. The LM103H-3.0 specifically denotes the 3.0V output version within this lineup. These devices are commonly found in older designs or specialized industrial equipment where proven reliability of the punch-through reference architecture is valued.

Replacement Considerations

Check Texas Instruments documentation for direct equivalents or updated revisions of the LM103 series. Verify pinout compatibility if substituting with other 3.0V references such as the LM4040 or TL431 variants, ensuring electrical parameters meet the original design constraints.