LM4040B25FTA

Overview

The LM4040B25FTA is a precision micropower shunt voltage reference manufactured by Diodes Incorporated. It provides a fixed output voltage of 2.5 V with an initial tolerance of ±0.2% at +25°C. The device operates within a wide current range from 60 µA to 15 mA and maintains stability over an extended temperature range of -40°C to +125°C. It features a maximum temperature coefficient of 100 ppm/°C and low output noise of 45 µVRMS in the 10 Hz to 10 kHz bandwidth. Packaged in a surface-mount SOT-23 format, it requires no external output capacitor.

Feature Summary

• Provides stable reference voltage without requiring an external output capacitor
• Maintains high precision across a wide operating current range
• Designed for excellent stability when driving capacitive loads
• Compliant with RoHS standards and free of halogens and antimony

Applications

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

Procurement Notes

Verify that the ordering suffix matches the required package type and reel quantity. Confirm the specific grade (B) and voltage (2.5V) align with design requirements. Check for automotive compliance needs, as standard parts differ from AEC-Q100 qualified versions. Ensure handling precautions are followed due to ESD sensitivity during installation.

Selection Notes

Select this component when space constraints favor the SOT-23 package over larger alternatives. Choose this part if the application demands a tight initial accuracy of ±0.2% at room temperature. Consider this device for designs where low quiescent current consumption is critical for battery life. Verify that the load conditions remain within the specified 60 µA to 15 mA operational window.

Part Context

This component belongs to the LM4040 family of bandgap circuits designed for precision voltage referencing. The B-grade designation indicates tighter initial tolerance compared to C or D grades. The FTA suffix specifies the SOT-23 surface mount package configuration with tape and reel packaging for automated assembly processes.

Replacement Considerations

The datasheet notes pin-to-pin compatibility with other LM4040 voltage references. Verify electrical parameters such as temperature coefficient and noise levels match the original design specifications before substitution.