LM4040C25QDBZRG4

Overview

The LM4040C25QDBZRG4 is a precision micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 2.5 V with an initial accuracy of 0.5%. The device operates within a temperature range of -40°C to +125°C and features a temperature coefficient of 150 PPM/°C. It requires a minimum cathode current of 75 µA and supports a maximum cathode current of 15 mA. Packaged in a compact SOT-23-3 surface-mount case, it is RoHS compliant and lead-free.

Feature Summary

• Provides stable 2.5 V reference voltage with 0.5% initial accuracy
• Operates across extended industrial temperature range up to 125°C
• Micropower design with low minimum operating current
• Compact SOT-23-3 surface-mount package for space-constrained applications

Applications

• Portable battery-powered instrumentation
• Data acquisition systems requiring precise voltage references
• Temperature measurement circuits
• Handheld devices with limited power budgets

Procurement Notes

Verify the Q suffix indicates automotive qualification requirements if applicable to your design. Confirm RoHS compliance status through official manufacturer documentation. Check for end-of-life notices as availability may vary. Ensure ordering suffixes match exact package and tape/reel specifications required for your manufacturing process.

Selection Notes

Select this component when a 2.5 V reference with 0.5% accuracy is needed in a small SOT-23-3 package. Consider the 150 PPM/°C temperature coefficient for thermal stability requirements. Verify that the 75 µA minimum current meets your circuit biasing constraints. Compare against other LM4040 variants if different voltage outputs or accuracy grades are suitable for your application.

Part Context

This part belongs to the LM4040 family of precision micropower shunt voltage references from Texas Instruments. The family offers various fixed output voltages including 2.048V, 2.5V, 3.0V, 4.096V, and 5.0V. All variants share similar electrical characteristics and packaging options, differing primarily in output voltage and accuracy grade indicated by the suffix letters.

Replacement Considerations

LM4040C25IDBZRG4 offers commercial grade instead of automotive grade. LM4040C25QDBZR is the non-green version without the G4 suffix. LM4040C25IDBZR provides commercial grade performance. Verify temperature ranges and qualification standards before substitution.