LM4040BIM3-3.0+T

Overview

The LM4040BIM3-3.0+T is a precision micropower shunt voltage reference manufactured by Analog Devices / Maxim Integrated. It provides a fixed reverse-breakdown output voltage of 3.000V with an initial accuracy of 0.2%. The device features a temperature coefficient of 100ppm/°C and operates within a temperature range of -40°C to +85°C. It utilizes a subminiature 3-pin SOT-23 surface-mount package, offering a compact footprint suitable for space-critical designs.

Feature Summary

• Laser-trimmed resistors ensure precise initial accuracy across multiple grades.
• Low dynamic impedance maintains stable reverse breakdown voltage over wide operating currents.
• Capable of tolerating capacitive loads without requiring external stabilizing capacitors.

Applications

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

Procurement Notes

Verify the specific suffix '+T' indicates tape and reel packaging when sourcing. Confirm that the 'I' grade designation corresponds to the required 0.2% initial accuracy and -40°C to +85°C temperature range. Ensure the ordering part number matches the exact voltage and package requirements for your design.

Selection Notes

Select this component when a fixed 3.000V reference is needed in a small SOT-23 package. The 0.2% accuracy grade offers a balance between precision and cost. Consider the 60μA minimum operating current requirement when designing the biasing circuit to ensure proper regulation under all load conditions.

Part Context

This component belongs to the LM4040 family of improved precision micropower shunt voltage references. The family includes various fixed reverse-breakdown voltages such as 2.048V, 2.500V, 3.3V, 4.096V, and 5.000V. Different letter grades (A, B, C, D) denote varying levels of initial accuracy and temperature coefficients.

Replacement Considerations

LM4040BIX3-3.0+T is a verified substitute using the SC70 package instead of SOT-23. Other LM4040 variants with different voltage outputs or accuracy grades may serve as functional replacements if electrical parameters align with system requirements.

FAQ

Does the LM4040BIM3-3.0+T require an external capacitor for stability?

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

What is the pin configuration for the SOT-23 package?

Pin 1 is the positive terminal, Pin 2 is the negative terminal, and Pin 3 is no connection (N.C.). Pin 3 must be left unconnected or connected to Pin 2.