LM4040B30FTA

Overview

The LM4040B30FTA is a precision micro-power shunt voltage reference manufactured by Diodes Incorporated. It provides a nominal output voltage of 3.0V with an initial tolerance of ±0.2% at +25°C. The device operates within a wide current range from 60µA to 15mA and maintains excellent 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 45µVRMS in the 10Hz to 10kHz bandwidth. Packaged in a compact SOT-23 surface mount format, it requires no external output capacitor.

Feature Summary

• High precision B-grade initial accuracy of ±0.2% at room temperature
• Capable of maintaining stable operation across a wide operating current range
• Designed for high capacitive load tolerance without requiring output capacitors
• Compliant with RoHS standards and free from halogen and antimony

Applications

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

Procurement Notes

Verify that the specific part number matches the required B-grade tolerance and 3.0V output specification. Confirm the package type is SOT-23 as SC70-5 variants are end-of-life. Ensure compliance with environmental directives such as RoHS 2 and RoHS 3 if applicable to your manufacturing region. Check datasheet notes regarding pin connections for proper PCB layout implementation.

Selection Notes

Select this component when a fixed 3.0V reference with tight initial tolerance is required in space-constrained designs. The B-grade classification ensures superior accuracy compared to C or D grades. Consider the 60µA minimum operating current for low-power battery applications. Verify that the thermal characteristics meet the ambient temperature requirements of the target environment.

Part Context

This device belongs to the LM4040 family of bandgap circuits designed for precision voltage referencing. It serves as a pin-for-pin compatible alternative to similar industry references. The family includes various voltage options and tolerance grades, with the B30 variant specifically targeting high-accuracy applications requiring a 3.0V output in a small footprint.

Replacement Considerations

SC70-5 variants (H5 package) are officially listed as End of Life (EOL). No direct substitute part numbers are provided in the documentation.