LM4040DIX3-2.1-T

Overview

The LM4040DIX3-2.1-T is a micropower shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated, designed for precision applications requiring stable output voltages. It provides a fixed output of 2.1 V with an initial accuracy of 1%. The device operates within a temperature range of -40°C to +85°C and features a maximum temperature coefficient of 70 ppm/°C. It supports a maximum shunt current of 15 mA and a minimum operating current of 60 µA. Packaged in the compact SC-70-3 (SOT-23-3) surface-mount format, it is suitable for space-constrained designs.

Feature Summary

• Provides a fixed 2.1 V output with 1% initial accuracy for precise voltage regulation.
• Operates over an extended industrial temperature range from -40°C to +85°C.
• Features ultra-low operating current suitable for power-restricted designs.
• Available in a compact SC-70-3 surface-mount package for space-saving integration.

Applications

• Portable battery-powered instrumentation
• Data acquisition systems
• Microprocessor supervisory circuits

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when ordering. Confirm the manufacturer designation as Analog Devices Inc. or Maxim Integrated, as legacy branding may vary across supply channels. Ensure the component meets RoHS compliance requirements for your region. Cross-reference the Mouser part number 700-LM4040DIX3-2.1T for availability status, as stock levels fluctuate. Validate that the SC-70-3 footprint matches your PCB design constraints before finalizing procurement.

Selection Notes

Select this component when a low-cost, high-accuracy shunt reference is required for fixed 2.1 V applications. The 1% tolerance suits general-purpose precision tasks where tighter tolerances are unnecessary. Consider the SC-70-3 package if board real estate is limited compared to larger SOT-23 variants. Evaluate the 70 ppm/°C temperature coefficient against your system's thermal environment to ensure stability requirements are met without additional compensation circuitry.

Part Context

This component belongs to the LM4040 family of micropower shunt voltage references, known for their high precision and low power consumption. The 'D' suffix denotes the 1% accuracy grade, distinguishing it from higher precision 'A' (0.1%) or 'B' (0.2%) variants. The 'IX3' indicates the SC-70-3 package type, offering a smaller footprint than the standard SOT-23-3. This series is widely used in industrial and consumer electronics for providing stable reference voltages in analog-to-digital conversion and monitoring circuits.

FAQ

What is the maximum shunt current for the LM4040DIX3-2.1-T?

The maximum shunt current is 15 mA, allowing it to handle moderate load currents while maintaining regulation.

Does the LM4040DIX3-2.1-T support capacitive loads?

Yes, the LM4040 series is stable when used with capacitive loads, simplifying filter design in application circuits.