LM4041CEM3X-ADJ

Overview

The LM4041CEM3X-ADJ is a precision micropower shunt voltage reference manufactured by Texas Instruments. It features an adjustable output voltage range from 1.225 V to 10 V, set via external resistors. The device operates with a minimum current of 45 µA and a maximum of 12 mA. It offers initial accuracy grades up to ±0.5% and temperature coefficients as low as 100 ppm/°C. Housed in a compact SOT-23 (SC-70) surface-mount package, it ensures stability with any capacitive load without requiring an external stabilizing capacitor.

Feature Summary

• Adjustable output voltage capability ranging from 1.225 V to 10 V using external resistor dividers
• Micropower operation with a typical minimum operating current of 45 µA for battery efficiency
• Intrinsic stability with all capacitive loads, eliminating the need for external compensation capacitors
• Low dynamic impedance and low noise characteristics ensure stable reverse breakdown voltage across wide operating conditions

Applications

• Data acquisition systems requiring precise voltage references
• Portable and battery-powered equipment due to low quiescent current
• Process control instrumentation and test equipment
• Power supply monitoring circuits

Procurement Notes

Verify the specific accuracy grade (e.g., C-grade for ±0.5%) and temperature coefficient (e.g., 100 ppm/°C or 150 ppm/°C) against project requirements, as these vary within the LM4041 family. Confirm the SC-70/SOT-23-3 package type matches the PCB footprint. Ensure the ordering suffix corresponds to the desired tape-and-reel quantity if applicable. Cross-reference the datasheet revision date to confirm compatibility with existing design specifications.

Selection Notes

Select this component when space-constrained designs require a precision shunt reference with adjustable output. It is suitable for applications needing stability without external capacitors. Compare accuracy grades; higher grades offer tighter tolerances but may have different pricing or availability. Consider the thermal performance within the specified -40°C to +85°C industrial range. Verify that the load current remains within the 45 µA to 12 mA operational window for optimal regulation.

Part Context

The LM4041 series comprises precision micropower shunt voltage references available in fixed and adjustable versions. The LM4041CEM3X-ADJ belongs to the adjustable subset, utilizing fuse and Zener-zap trimming during wafer sort to achieve high accuracy. It is part of Texas Instruments' portfolio designed for cost-effective, high-performance voltage referencing in portable and industrial electronics.

Replacement Considerations

LM4041CEM3X-1.2/NOPB: Fixed 1.225V version in same package. LM4041CIM3X-ADJ/NOPB: Higher accuracy grade (±0.2%) adjustable version. LM4041DILP: Through-hole TO-92 adjustable version.