LM4040CIX3-2.1+T

Overview

The LM4040CIX3-2.1+T is a precision, two-terminal shunt mode bandgap voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed reverse-breakdown output voltage of 2.048V with an initial accuracy of 0.5%. The device features a maximum temperature coefficient of 100ppm/°C and operates within a temperature range of -40°C to +85°C. It utilizes a subminiature 3-pin SC70 surface-mount package (1.8mm x 1.8mm) and supports a shunt current capability ranging from 60μA to 15mA.

Feature Summary

• Ultra-small 3-pin SC70 surface-mount package designed for space-critical applications
• Laser-trimmed resistors ensure precise initial accuracy across multiple grades
• Stable operation without requiring external stabilizing capacitors
• Capable of tolerating any capacitive load while maintaining stability

Applications

• Portable, battery-powered equipment
• Notebook computers
• Cell phones
• Industrial process controls
• Automotive systems

Procurement Notes

Verify the specific suffix '+T' indicates tape and reel packaging when sourcing. Confirm that the 'C' grade designation corresponds to the required 0.5% initial accuracy and 100ppm/°C temperature coefficient specifications. Ensure the component meets lead-free/RoHS compliance requirements as indicated by the '+' symbol in the ordering information.

Selection Notes

Select this component when a compact footprint is necessary alongside moderate precision requirements. The SC70 package offers a 50% size reduction compared to SOT23 alternatives. Verify that the operating environment remains within the specified -40°C to +85°C industrial temperature range for guaranteed performance parameters.

Part Context

This part belongs to the LM4040 family of improved precision micropower shunt voltage references. The series offers multiple fixed reverse-breakdown voltages including 2.048V, 2.500V, 3.000V, 3.3V, 4.096V, and 5.000V. Variants are available in both SC70 and SOT23 packages with different accuracy grades ranging from 0.1% to 1%.

Replacement Considerations

LM4040CIM3-2.1+T (SOT23-3 package equivalent)

FAQ

Does the LM4040CIX3-2.1+T require an external capacitor for frequency stability?

No, the device does not require an external stabilizing capacitor and is stable with any capacitive load.

What is the function of Pin 3 on the SC70 package?

Pin 3 is designated as No Connection (N.C.) and must be left unconnected or connected to Pin 2.