LM4040B50FTA

Overview

The LM4040B50FTA is a precision micro-power shunt voltage reference manufactured by Diodes Incorporated. It provides a fixed output voltage of 5.0V with an initial tolerance of ±0.2% at +25°C. The device operates within a wide current range from 60µA to 15mA and maintains stability over an extended temperature range of -40°C to +125°C. It features a maximum temperature coefficient of 100 ppm/°C and utilizes a compact SOT-23 surface-mount package.

Feature Summary

• Provides high-precision voltage referencing with tight initial tolerance specifications
• Operates effectively across a broad operating current range suitable for power-constrained designs
• Maintains excellent stability when subjected to capacitive loads without requiring external compensation components

Applications

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

Procurement Notes

Verify the specific grade suffix 'B' corresponds to the required ±0.2% accuracy level for your design. Confirm that the SOT-23 package dimensions align with your PCB footprint requirements. Ensure the operating environment remains within the specified -40°C to +125°C temperature range to maintain guaranteed performance parameters.

Selection Notes

Select this component when a stable 5.0V reference is needed in space-limited applications. The B-grade designation ensures tighter initial accuracy compared to C or D grades. Consider the low minimum operating current if designing for battery-powered systems where quiescent consumption must be minimized while maintaining regulation.

Part Context

This part 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 device is fully RoHS compliant and halogen-free, meeting environmental standards for modern electronics manufacturing.

Replacement Considerations

LM4040C50FTA (0.5% tolerance)

FAQ

How should Pin 3 be handled in the SOT-23 package?

Pin 3 must be left floating or connected directly to Pin 2 due to the internal die attachment structure.

Is an output capacitor required for stability?

No, the device is designed to be highly tolerant of capacitive loads and does not require an output capacitor for operation.