LM4041B12IDCKR

Overview

The LM4041B12IDCKR is a precision micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 1.225V with an initial accuracy of ±0.2%. The device operates within a temperature range of -40°C to +85°C and features a maximum temperature coefficient of 100 ppm/°C. It utilizes a SC-70-5 (SOT-353) surface-mount package. Key electrical specifications include a maximum supply voltage of 15V, a typical operating current range of 45µA to 12mA, and a typical output noise of 20µVRMS in the 10Hz to 10kHz bandwidth.

Feature Summary

• Provides stable reference voltage without requiring external capacitors for stability across all capacitive loads
• Offers high precision with low temperature coefficient suitable for accurate measurement applications
• Designed for low power consumption with wide operating current range from microamps to milliamps

Applications

• Data acquisition systems requiring precise voltage references
• Portable battery-powered equipment due to low quiescent current
• Handheld instruments and test equipment calibration
• Process control systems needing stable analog references

Procurement Notes

Verify the specific suffix IDCKR corresponds to the SC-70-5 package and B-grade accuracy when sourcing. Confirm the industrial temperature grade (-40°C to +85°C) matches system requirements rather than the extended grade variants. Ensure compatibility with RoHS standards if required by the manufacturing process. Check for alternative tape-and-reel quantities if volume production is planned.

Selection Notes

Select this component when a fixed 1.225V reference with ±0.2% tolerance is required in a compact SC-70-5 footprint. It is appropriate for designs prioritizing low noise and stability without external compensation components. Consider the 100 ppm/°C temperature coefficient against environmental thermal variations. Compare against A-grade or D-grade variants if tighter or looser tolerances better fit cost constraints.

Part Context

This part belongs to the LM4041 family of micropower shunt voltage references from Texas Instruments. The family includes adjustable versions and various accuracy grades (A, B, C, D). The LM4041 series is designed to replace bulkier Zener diodes in precision applications, offering superior temperature stability and lower dynamic impedance in a small surface-mount form factor.

Replacement Considerations

LM4041A12IDCKR offers higher accuracy (±0.1%) with similar packaging. LM4041C12IDCKR provides lower accuracy (±0.5%) potentially at reduced cost. LM4041D12IDCKR offers ±1.0% accuracy. For automotive or high-temperature needs, consider the LM4041xQ series which supports up to +125°C.