LM4040DYM3-4.1-TR

Overview

The LM4040DYM3-4.1-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 4.096V with an initial accuracy tolerance of ±1%. The device operates within a temperature range of -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 of approximately 73 µA.

Feature Summary

• Bandgap reference architecture with temperature drift curvature correction for stable performance across varying temperatures and currents.
• Capable of tolerating capacitive loads without requiring an external output capacitor for stability.
• Low dynamic impedance ensures consistent reverse-breakdown voltage accuracy under different operating conditions.

Applications

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

Procurement Notes

Verify the specific suffix 'D' confirms the ±1% initial accuracy grade and 'YM3' denotes the SOT-23 package type. Confirm the '-TR' suffix indicates tape and reel packaging. Ensure the manufacturer is identified as Microchip Technology, noting that this component family was previously produced by other entities such as Maxim Integrated or Texas Instruments.

Selection Notes

Select this component when a fixed 4.096V reference is required in space-constrained designs utilizing the SOT-23 form factor. The D-grade specification suits applications needing ±1% initial accuracy. Consider the 15 mA maximum current limit for load requirements and ensure the operating environment remains within the industrial temperature range of -40°C to +85°C.

Part Context

This part belongs to the LM4040/LM4041 series of precision micropower shunt voltage references. The LM4040 variant specifically offers fixed voltage options including 2.500V, 4.096V, and 5.000V. These devices are designed for applications where low power consumption and high accuracy are critical, serving as stable voltage benchmarks in electronic circuits.

Replacement Considerations

LM4040CIM3X-4.1/G4 (Texas Instruments)

FAQ

Is an external output capacitor required for stability?

No, the LM4040 is designed to tolerate capacitive loads and does not require an external output capacitor for stability.

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

Pin 3 is Not Connected (NC) internally and must be left floating or connected to Pin 2 (Anode).