LM4040C41IDBZRG4

Overview

The LM4040C41IDBZRG4 is a precision micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 4.096V 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 average temperature coefficient of 100ppm/°C. Packaged in a space-saving SOT-23-3 (DBZ) format, it requires a minimum cathode current of 45μA typical and supports operation up to 15mA.

Feature Summary

• Offers tight output tolerances and low temperature coefficients for stable performance across varying conditions
• Operates stably with all capacitive loads without requiring external output capacitors
• Designed for portable applications due to micropower consumption characteristics

Applications

• Data-acquisition systems
• Energy infrastructure monitoring
• Analog input modules
• Field transmitters
• Precision audio circuits

Procurement Notes

Verify the specific suffix 'G4' indicates RoHS compliance and lead-free status as per manufacturer documentation. Confirm the DBZ package designation matches the required SOT-23-3 footprint for PCB layout compatibility. Ensure the C grade specification aligns with the required 0.5% accuracy and industrial temperature range constraints for the target application environment.

Selection Notes

Select this component when a fixed 4.096V reference with 0.5% initial accuracy is required. The industrial temperature range (-40°C to 85°C) suits standard commercial and industrial environments. Consider the SOT-23-3 package for space-constrained designs. Verify that the system can maintain the minimum operating current of 45μA to ensure regulation stability.

Part Context

This part belongs to the LM4040 series of shunt voltage references from Texas Instruments. The series includes various grades (A, B, C, D) offering different accuracy levels and temperature coefficients. The 'C' grade specifically denotes 0.5% accuracy with a 100ppm/°C temperature coefficient. The 'I' suffix indicates the industrial temperature range, while 'Q' would indicate extended range.

FAQ

Does the LM4040C41IDBZRG4 require an output capacitor for stability?

No, the device is designed to be stable with all capacitive loads and does not require an external output capacitor for operation.

What is the minimum cathode current required for proper regulation?

The typical minimum cathode current required for operation is 45μA, though it may rise to 80μA across the full temperature range.