LM4040D25FTA

Overview

The LM4040D25FTA is a precision micro-power shunt voltage reference manufactured by Diodes Incorporated. It provides a fixed output voltage of 2.5V with an initial tolerance of ±1% at +25°C. The device operates within a wide current range from 60µA to 15mA and maintains stability over an extended temperature range of -40°C to +125°C. It features a maximum average temperature coefficient of 100 ppm/°C and low output noise of 45µVRMS in the 10Hz to 10kHz bandwidth. Packaged in a compact SOT23 surface-mount format, it requires no external output capacitor.

Feature Summary

• Compact SOT23 surface-mount package designed for space-constrained applications
• Capable of stable operation without requiring an external output capacitor
• Highly tolerant of capacitive loads while maintaining excellent stability
• Compliant with RoHS directives and free of halogens and antimony

Applications

• Battery powered equipment
• Precision power supplies
• Portable instrumentation
• Data acquisition systems

Procurement Notes

Verify that the specific ordering suffix matches the required tolerance grade and package type. Confirm the component status is listed as Full Production rather than End of Life. Ensure the supplier source is authorized to guarantee compliance with lead-free and environmental specifications outlined in the datasheet.

Selection Notes

Select this part when a 2.5V reference with 1% accuracy is sufficient for the design requirements. Consider the 60µA minimum operating current limit for low-power battery applications. Verify that the load conditions allow the shunt current to remain within the 15mA maximum rating across the full operating temperature range.

Part Context

This component belongs to the LM4040 family of bandgap circuits offering multiple fixed voltage options. While other grades like B (0.2%) and C (0.5%) exist, the D-grade variant provides standard precision. The SC70-5 variants within this family are designated as End of Life, making the SOT23 package the primary active option.

Replacement Considerations

LM4040B25FTA

FAQ

How should Pin 3 be handled in the SOT23 package?

Pin 3 must be left floating or connected to Pin 2 due to the electrical contact between these pins resulting from the die attachment.

What is the typical noise performance of this device?

The device exhibits a typical noise voltage of 45µVRMS measured within the frequency range of 10Hz to 10kHz.