LM4040EIM7-3.0

Overview

The LM4040EIM7-3.0 is a micropower shunt voltage reference manufactured by National Semiconductor, now part of Texas Instruments. It provides a fixed output voltage of 3.0 V with an initial accuracy of ±0.5%. The device features a maximum temperature coefficient of 100 ppm/°C and operates within an industrial temperature range of -40 °C to +85 °C. It is housed in a compact SOT-23 (SC-70) surface-mount package.

Feature Summary

• Provides stable 3.0 V reference output with high precision
• Designed for space-constrained applications via small footprint packaging
• Operates reliably across the full industrial temperature range

Applications

• Portable battery-powered instrumentation
• Data acquisition systems requiring precise voltage references
• Temperature sensing circuits

Procurement Notes

Verify that the component is sourced from authorized distributors or qualified secondary markets like Rochester Electronics. Confirm the presence of the NOPB suffix if lead-free compliance is required, as original National Semiconductor parts may differ in material specifications compared to current TI equivalents.

Selection Notes

Select this component when a 3.0 V reference with ±0.5% accuracy is needed in a minimal footprint. Ensure the application current does not exceed the maximum shunt current rating. Consider the 100 ppm/°C temperature coefficient against stricter requirements offered by higher-grade variants in the LM4040 family.

Part Context

This part belongs to the LM4040 series of micropower shunt voltage references. It shares core architecture with other variants offering different voltages and accuracies. The 'E' indicates ±0.5% initial accuracy, while 'M7' denotes the SC-70/SOT-23 package style.

Replacement Considerations

Direct replacements include LM4040DIM3-3.0/NOPB or LM4040CIM3-3.0/NOPB from Texas Instruments. Verify pinout compatibility and thermal performance before substituting.