LM4040C50IDCKR

Overview

The LM4040C50IDCKR is a micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 5V with an initial accuracy tolerance of ±0.5%. The device operates within an ambient temperature range of -40°C to 85°C and features a maximum temperature coefficient of 100ppm/°C. It requires a minimum cathode current of 45µA (typical) and supports a maximum continuous cathode current of 15mA. The component is housed in a space-saving SC-70-5 package.

Feature Summary

• Provides stable reference voltage without requiring external capacitors for operation
• Maintains stability across all capacitive loads
• Offers low dynamic impedance and low noise performance
• Utilizes fuse and Zener-zap reverse breakdown voltage trim during wafer sort

Applications

• Data-Acquisition Systems
• Energy Infrastructure
• Analog Input Module
• Field Transmitters
• Precision Audio

Procurement Notes

Verify the specific ordering suffix 'DCKR' corresponds to the SC-70-5 package configuration required for your design. Confirm that the C-grade tolerance and industrial temperature rating align with system specifications. Ensure the manufacturer part number matches exactly to avoid pinout or electrical characteristic mismatches.

Selection Notes

Select this component when a fixed 5V reference with ±0.5% accuracy is needed in a compact surface-mount footprint. It is suitable for portable applications due to its low minimum operating current. Consider alternative grades if tighter tolerances or extended temperature ranges are required.

Part Context

This device belongs to the LM4040 series of precision micropower shunt voltage references from Texas Instruments. The series includes various output voltages and accuracy grades, packaged in SC-70, SOT-23, and TO-92 formats. The LM4040C50IDCKR specifically represents the C-grade variant with a 5V output in the SC-70-5 package.

Replacement Considerations

LM4040B50IDCKR offers tighter 0.2% tolerance. LM4040A50IDCKR provides 0.1% accuracy. LM4040C50QDCKR extends the operating temperature range to 125°C.