LM4040AEX3-3.0/V+T

Overview

The LM4040AEX3-3.0/V+T is a precision micropower shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed reverse-breakdown output voltage of 3.000V with an initial accuracy of 0.1% and a maximum temperature coefficient of 100ppm/°C. The device operates within a wide current range of 60μA to 15mA and supports an extended industrial temperature range from -40°C to +125°C. It utilizes a subminiature 3-pin SC70 surface-mount package.

Feature Summary

• Laser-trimmed resistors ensure precise initial accuracy across multiple grades.
• Low dynamic impedance maintains stable reverse breakdown voltage over varying operating currents.
• Inherent stability eliminates the need for external stabilizing capacitors while tolerating any capacitive load.

Applications

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

Procurement Notes

Verify that the /V suffix confirms AEC-Q100 automotive qualification status as specified in the manufacturer's ordering information table. Confirm the specific package code X3 corresponds to the required SC70 footprint dimensions and land pattern requirements for your PCB design before finalizing procurement.

Selection Notes

Select this component when space constraints necessitate the use of the SC70 package over larger alternatives like SOT23. Ensure the application requires the high precision offered by the 'A' grade (0.1% accuracy) and the extended temperature capability provided by the 'E' series designation. Verify that the system supply voltage allows for proper biasing within the specified shunt current limits.

Part Context

This part belongs to the LM4040 family of improved precision micropower shunt voltage references. The family offers various fixed reverse-breakdown voltages including 2.048V, 2.500V, 3.3V, 4.096V, and 5.000V. Different suffixes indicate variations in accuracy grades, temperature ranges, and package types such as SOT23 or SC70.

Replacement Considerations

Direct substitutes include other LM4040 variants with matching electrical characteristics and package types, such as LM4040AEX3-3.0+T. Cross-referencing the specific accuracy grade and temperature range is essential when selecting alternative parts from different manufacturers.

FAQ

Does the LM4040 require an external capacitor for frequency stability?

No, the device does not require an external stabilizing capacitor and remains stable when used 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.