LM4041DEX3-1.2+T

Overview

The LM4041DEX3-1.2+T is a precision micropower shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed reverse breakdown voltage of 1.225V with an initial accuracy of 1.0% at +25°C and a maximum temperature coefficient of 150ppm/°C. The device operates within a wide current range from 60µA to 12mA, featuring low dynamic impedance and stable performance across the -40°C to +125°C extended temperature range. Packaged in a subminiature 3-pin SC70 surface-mount format, it eliminates the need for external stabilizing capacitors while tolerating any capacitive load.

Feature Summary

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

Applications

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

Procurement Notes

Verify that the ordering suffix 'E' confirms the extended temperature range (-40°C to +125°C) and 'X3' specifies the SC70-3 package. Confirm the '+T' designation indicates tape-and-reel packaging. Ensure the part number matches the specific 1.0% accuracy grade required for the design. Cross-reference the manufacturer's official documentation to validate lead-free/RoHS compliance status associated with the '+' suffix.

Selection Notes

Select this component when a compact footprint is required alongside high precision. The SC70 package offers a 50% size reduction compared to SOT23 alternatives. Verify that the 1.0% accuracy meets system requirements, as tighter grades (0.1%, 0.2%, 0.5%) are available in the same family. Ensure the operating current remains between 60µA and 12mA for optimal regulation and stability.

Part Context

The LM4041 series utilizes a bandgap principle to generate a stable reference voltage. It functions similarly to an ideal Zener diode, maintaining a constant output when biased within its specified current range. The device incorporates internal pass transistors to sink necessary current across a source resistor, making it suitable for providing stable references from high-voltage power supplies.

Replacement Considerations

LM4041BIX3-1.2+T

FAQ

Does the LM4041DEX3-1.2+T require an external capacitor for frequency stability?

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

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

Pin 3 is designated as N.C. (Not Connected). It must be left floating or connected to Pin 2 (Negative Terminal).