LM4040DYM3-2.5-TR

Overview

The LM4040DYM3-2.5-TR is a precision micropower shunt voltage reference manufactured by Microchip Technology, housed in a 3-pin SOT-23 surface-mount package. It provides a fixed reverse-breakdown output voltage of 2.5V with an initial accuracy tolerance of ±1%. The device operates within an industrial temperature range from -40°C to +85°C and features a maximum average temperature coefficient of 150 ppm/°C. It supports a maximum operating current of 15 mA and requires a minimum operating current ranging from 65 µA to 70 µA depending on conditions.

Feature Summary

• Bandgap reference architecture with temperature drift curvature correction for stable voltage accuracy across wide operating ranges.
• Capable of tolerating capacitive loads without requiring an external output capacitor for stability.
• Low dynamic impedance ensures consistent performance under varying load currents.

Applications

• Battery-powered equipment
• Data acquisition systems
• Instrumentation
• Process control
• Precision audio components

Procurement Notes

Verify the specific D-grade suffix (D) indicates the required 1% initial accuracy and 150 ppm/°C temperature coefficient specifications. Confirm the YM3 designation corresponds to the standard 3-pin SOT-23 package type. Ensure the TR suffix matches the required tape and reel packaging format for automated assembly processes.

Selection Notes

Select this component when space constraints necessitate a subminiature SOT-23 footprint while maintaining precise voltage regulation. It is suitable for power-restricted designs due to its low quiescent current requirements. Verify that the application can accommodate the specified maximum operating current limits during peak load conditions.

Part Context

This part belongs to the LM4040/LM4041 family of precision micropower shunt voltage references. The LM4040 series specifically offers fixed voltage options including 2.5V, 4.096V, and 5.0V, distinguishing it from the adjustable LM4041 variants. The D-grade variant represents the standard 1% accuracy tier within the product line.

Replacement Considerations

LM4040CYM3-2.5-TR

FAQ

Is an external output capacitor required for stability?

No, the device does not require an output capacitor and can tolerate capacitive loads directly.

What is the function of Pin 3 in the SOT-23 package?

Pin 3 is not internally connected; it must be left floating or connected to Pin 2 (Anode).