LM4040DIM3X-5.0/NOPB

Overview

The LM4040DIM3X-5.0/NOPB is a precision micropower shunt voltage reference manufactured by Texas Instruments, formerly National Semiconductor. It provides a fixed output voltage of 5 V with an initial accuracy of 1%. The device operates within a temperature range of -40°C to +85°C and features a temperature coefficient of 150 ppm/°C. It supports a maximum shunt current of 15 mA and requires a minimum cathode current of 70 µA for regulation. Packaged in a compact SOT-23-3 surface-mount case, it is designed for applications requiring stable voltage references in space-constrained environments.

Feature Summary

• Provides a fixed 5 V output with 1% initial accuracy
• Operates over an extended industrial temperature range
• Features low power consumption suitable for battery-powered systems
• Utilizes a compact SOT-23-3 surface-mount package

Applications

• Portable instrumentation requiring precise voltage references
• Battery-powered measurement devices
• Data acquisition systems
• Microcontroller analog-to-digital converter references

Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor. Confirm the specific suffix 'DIM3X' corresponds to the SOT-23-3 package and tape-and-reel orientation. Ensure the 'NOPB' suffix indicates lead-free and RoHS compliance. Cross-reference the part number with official Texas Instruments documentation to confirm availability status and any potential obsolescence notices.

Selection Notes

Select this component when a fixed 5 V reference with 1% accuracy is required in a small footprint. Consider the 150 ppm/°C temperature coefficient for thermal stability needs. Evaluate the 70 µA minimum operating current against system quiescent requirements. Compare against other LM4040 variants if different output voltages or tighter accuracy specifications are necessary.

Part Context

This part belongs to the LM4040-N family of micropower shunt voltage references. The family offers various fixed output voltages ranging from 2.048 V to 10 V. Variants differ in accuracy grades (0.1%, 0.5%, 1%) and package types. The LM4040 series is widely used in general-purpose analog circuits where stable reference voltages are critical for performance.

Replacement Considerations

Direct substitutes include other LM4040 variants with compatible pinouts and electrical characteristics. Verify that alternative parts match the 5 V output, 1% accuracy, and SOT-23-3 package. Check for equivalent temperature coefficients and current requirements to ensure circuit compatibility without modification.