LM4040B50IDBZR

Overview

The LM4040B50IDBZR is a precision micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 5 V with an initial accuracy of ±0.2%. The device operates within a temperature range of -40°C to +85°C and features a temperature coefficient of 100 ppm/°C. Electrical characteristics include a maximum cathode current of 15 mA, a minimum operating current of 95 µA, and a noise level of 80 µVrms from 10 Hz to 10 kHz. It is housed in a SOT-23-3 surface-mount package.

Feature Summary

• Provides a stable 5 V reference voltage with high initial accuracy for precision applications
• Operates efficiently at low currents suitable for battery-powered systems
• Maintains performance stability across industrial temperature ranges

Applications

• Portable instrumentation requiring precise voltage references
• Battery-operated measurement devices
• Data acquisition systems needing stable analog references

Procurement Notes

Verify the specific suffix IDBZR corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the B-grade accuracy rating meets the strict tolerance requirements of the target circuit design before finalizing procurement orders.

Selection Notes

Select this component when a 5 V reference with ±0.2% accuracy is required in a compact SOT-23-3 footprint. Ensure the application current remains within the 95 µA to 15 mA operational window to maintain specified regulation performance and thermal stability.

Part Context

This part belongs to the LM4040 series of micropower shunt voltage references. It serves as a compact alternative to larger package references, offering similar electrical performance in a space-constrained surface-mount form factor suitable for modern PCB layouts.

Replacement Considerations

LM4040B50IDBZRG4 is a verified equivalent variant within the same product family.