LM4041AIM3-1.2-T

Overview

The LM4041AIM3-1.2-T is a precision micropower shunt voltage reference featuring a fixed reverse breakdown voltage of 1.225V. It provides an initial accuracy of ±0.1% at 25°C with a maximum temperature coefficient of 100ppm/°C. The device operates within a wide current range from 60µA to 12mA and exhibits low output noise of 20µVRMS (10Hz to 10kHz). It is housed in a subminiature 3-pin SOT23 package and is guaranteed to function over the extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Ultra-small 3-pin SOT23 surface-mount package designed for space-critical applications
• High precision with laser-trimmed resistors ensuring ±0.1% initial accuracy
• Stable operation without external stabilizing capacitors across any capacitive load
• Low dynamic impedance ensures stable voltage accuracy over wide operating currents

Applications

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

Procurement Notes

Verify that the ordering suffix matches the required specifications. Confirm the package type corresponds to the SOT23 variant rather than the SC70 version. Ensure the temperature grade aligns with the extended range requirement (-40°C to +125°C) indicated by the 'E' designation in the part number structure. Cross-reference the manufacturer's official documentation to validate lead-free status and RoHS compliance before finalizing procurement.

Selection Notes

Select this component when a fixed 1.225V reference is required in a compact footprint. The SOT23 package offers a 50% size reduction compared to standard SOT23 devices found in other series. Choose this specific grade if the design demands ±0.1% initial accuracy at 25°C. Verify that the application environment stays within the -40°C to +125°C operational limits to maintain specified performance characteristics.

Part Context

This device belongs to the LM4041 family of improved precision micropower shunt voltage references manufactured by Maxim Integrated. It utilizes bandgap reference technology with curvature correction to minimize temperature drift. The product line includes various accuracy grades and package options, allowing designers to optimize for cost, size, or precision requirements while maintaining consistent electrical behavior across the series.

Replacement Considerations

LM4041BIM3-1.2-T: Offers 0.2% accuracy instead of 0.1%. LM4041CEM3-1.2-T: Provides 0.5% accuracy. LM4041DEM3-1.2-T: Features 1.0% accuracy and a higher temperature coefficient. These parts share the same pinout and functionality but differ in initial tolerance specifications.