LM4041DEM3-1.2+

Overview

The LM4041DEM3-1.2+ is a precision two-terminal shunt voltage reference manufactured by Maxim Integrated (Analog Devices). It provides a fixed reverse breakdown voltage of 1.225V with an initial accuracy of 1.0% and a maximum temperature coefficient of 150ppm/°C. The device operates within a wide current range from 60µA to 12mA, ensuring stable performance across varying loads. It is housed in a subminiature SOT23-3 surface-mount package and is guaranteed to function over an extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Ultra-small 3-pin SOT23 surface-mount package for space-critical designs
• Laser-trimmed resistors ensure precise initial accuracy without external calibration
• Stable operation with any capacitive load without requiring external stabilizing capacitors
• Low dynamic impedance maintains accurate reverse-breakdown voltage over wide operating currents

Applications

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

Procurement Notes

Verify the specific suffix 'DEM3' corresponds to the SOT23-3 package and the '+T' tape-and-reel configuration when sourcing. Confirm that the 'D' grade designation aligns with the required 1.0% initial accuracy specification. Ensure the component meets RoHS compliance requirements if mandated by your manufacturing standards. Cross-reference the manufacturer's ordering information to validate availability and lead times directly with authorized distributors.

Selection Notes

Select this component when a compact footprint is essential alongside high precision. The 1.0% accuracy grade offers a balance between cost and performance for general-purpose applications. Consider the 60µA minimum operating current requirement to ensure proper regulation under light load conditions. Verify that the 12mA maximum shunt current capability accommodates the worst-case supply voltage and load variations in the design.

Part Context

The LM4041 series represents an improved version of the micropower shunt voltage reference family. It utilizes bandgap circuitry to achieve stability and low noise. The device is available in multiple accuracy grades (0.1%, 0.2%, 0.5%, 1.0%) and packages (SC70-3, SOT23-3). The LM4041DEM3-1.2+ specifically denotes the 1.0% accuracy variant in the SOT23-3 package with lead-free/RoHS-compliant construction.

Replacement Considerations

Direct pin-compatible alternatives include other grades within the LM4041 family such as LM4041CIM3-1.2+ (0.5% accuracy) or LM4041BIM3-1.2+ (0.2% accuracy). For SC70-3 packaging, consider LM4041DEX3-1.2+. Verify that substitute parts meet the same temperature range (-40°C to +125°C) and electrical specifications.