LM4040DYM3-5.0-TR

Overview

The LM4040DYM3-5.0-TR is a precision micropower shunt voltage reference manufactured by Microchip Technology, featuring a fixed reverse-breakdown output voltage of 5.000V. It utilizes a bandgap reference topology with temperature drift curvature correction to maintain accuracy across the industrial operating temperature range of -40°C to +85°C. The device operates within a current range of 74 µA to 15 mA and provides an initial accuracy of ±1% at 25°C. It incorporates low dynamic impedance and wideband noise characteristics suitable for stable performance in space-constrained applications.

Feature Summary

• Bandgap reference architecture with temperature drift curvature correction
• Capacitive load stability without requiring external output capacitors
• Low power consumption optimized for battery-powered equipment
• Subminiature SOT-23 surface-mount package design

Applications

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

Procurement Notes

Verify that the ordering suffix 'TR' corresponds to tape and reel packaging as specified in the datasheet. Confirm the D-grade designation aligns with the required ±1% initial accuracy and 150 ppm/°C maximum temperature coefficient specifications. Ensure the component meets RoHS compliance standards before procurement.

Selection Notes

Select this component when a fixed 5V reference is required in a compact SOT-23 footprint. The D-grade variant offers ±1% tolerance, which may be sufficient for general-purpose applications where tighter C-grade tolerances are unnecessary. Verify that the minimum operating current of 74 µA fits the system's quiescent power budget.

Part Context

This part belongs to the LM4040/LM4041 family of precision micropower shunt voltage references. The LM4040 series specifically provides fixed voltage options including 2.5V, 4.096V, and 5.0V. These devices are designed for high accuracy and low power operation, making them ideal for portable electronics and industrial measurement systems requiring reliable voltage regulation.

Replacement Considerations

LM4040CYM3-5.0-TR (C-grade, ±0.5% accuracy)

FAQ

Does the LM4040 require an external capacitor for stability?

No, the LM4040 is stable with capacitive loads and does not require an output capacitor. However, an external capacitor greater than 10 nF should be connected between the positive and negative pins for optimal operation.

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

Pin 3 is Not Connected (NC) internally. It must be left floating or connected to Pin 2 (Anode). A parasitic Schottky diode exists between Pin 2 and Pin 3.