LM4040D41IDBZR

Overview

The LM4040D41IDBZR 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 ±1%. The device operates within an ambient temperature range of –40°C to 85°C and features a maximum average temperature coefficient of 150ppm/°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 SOT-23 surface-mount package.

Feature Summary

• Provides stable reference voltage using fuse and Zener-zap reverse breakdown voltage trim during wafer sort
• Operates without external output capacitors while remaining stable with all capacitive loads
• Maintains low dynamic impedance and low noise for consistent performance across wide operating currents and temperatures

Applications

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

Procurement Notes

Verify the specific suffix 'DBZR' corresponds to the SOT-23 package and tape-and-reel delivery format as defined in the manufacturer's orderable addendum. Confirm that the 'I' designation aligns with the required industrial temperature range of –40°C to 85°C for your application environment. Ensure compatibility with standard surface-mount assembly processes.

Selection Notes

Select this component when a fixed 4.096V reference with ±1% initial accuracy is sufficient. The D grade offers a 150ppm/°C temperature coefficient, which is less precise than A, B, or C grades but suitable for cost-sensitive designs. Verify that the circuit can maintain at least 45μA cathode current to ensure regulation stability.

Part Context

This part belongs to the LM4040 series of micropower shunt voltage references from Texas Instruments. The series includes multiple voltage options and accuracy grades (A through D). The LM4040D41IDBZR specifically represents the D-grade version with 4.096V output, packaged in SOT-23 for compact PCB integration.

Replacement Considerations

LM4040D41IDBZT is a compatible alternative in the same SOT-23 package with identical electrical characteristics but different packaging format.