LM4040B41IDCKR

Overview

The LM4040B41IDCKR is a micropower shunt voltage reference from Texas Instruments, providing a fixed output of 4.096 V with an initial accuracy of ±0.2%. Packaged in a compact SC-70-5 (SOT-353) surface-mount case, it operates within a temperature range of -40°C to +85°C. The device features a maximum cathode current of 15 mA and a minimum operating current of 68 µA. It exhibits a temperature coefficient of 100 ppm/°C and low noise characteristics of 80 µVrms between 10 Hz and 10 kHz.

Feature Summary

• Micropower operation with minimal quiescent current consumption
• High precision fixed voltage output with tight initial tolerance
• Compact SC-70-5 surface-mount package for space-constrained designs

Applications

• Portable battery-powered instrumentation requiring precise references
• Data acquisition systems needing stable analog-to-digital conversion references
• Microcontroller power supply monitoring circuits

Procurement Notes

Verify the specific suffix IDCKR corresponds to the SC-70-5 package and ±0.2% accuracy grade when sourcing. Confirm RoHS compliance status and ensure the supplier provides official datasheets matching the manufacturer's specifications. Cross-check pinout assignments against the SC-70-5 footprint to prevent assembly errors during integration.

Selection Notes

Select this component when a small form factor is critical alongside high precision requirements. The SC-70-5 package offers significant size reduction compared to traditional SOT-23 options. Ensure the application current does not exceed the 15 mA maximum limit while maintaining sufficient bias above the minimum operating threshold for stable regulation.

Part Context

Part of the LM4040 family of micropower shunt voltage references, designed for applications demanding stability in limited spaces. The B-grade designation indicates tighter initial accuracy compared to standard grades. The IDCKR suffix specifies the SC-70-5 packaging variant, distinguishing it from other package types within the same electrical specification family.

Replacement Considerations

LM4040B41IDCKRG4 is a direct equivalent with updated environmental compliance markings.