LM4040C50QDBZR

Overview

The LM4040C50QDBZR is a precision 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 extended temperature range from -40°C to +125°C and features a maximum temperature coefficient of 100ppm/°C. It requires a minimum cathode current of 45μA for regulation and supports a maximum continuous cathode current of 15mA. The component is housed in a space-saving SOT-23 package.

Feature Summary

• Maintains stable output voltage across wide operating currents and temperatures due to low dynamic impedance and low noise characteristics.
• Operates without external capacitors while remaining stable with all capacitive loads.
• Utilizes fuse and Zener-zap reverse breakdown voltage trim during wafer sort to achieve tight output tolerances.

Applications

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

Procurement Notes

Verify the specific suffix 'Q' indicates the extended temperature range (-40°C to 125°C) and 'DBZ' denotes the SOT-23 package configuration. Confirm that the 'C' grade corresponds to the required 0.5% initial accuracy and 100ppm/°C temperature coefficient specifications before finalizing procurement orders.

Selection Notes

Select this component when a fixed 5V reference is required in portable or space-constrained designs. It is suitable for applications demanding stability with varying capacitive loads without additional output components. Ensure the design accommodates the minimum operating current of 45μA and does not exceed the 15mA maximum cathode current limit.

Part Context

This part belongs to the LM4040 series of shunt voltage references, which are designed for versatile use in various electronic systems. The series offers multiple fixed output voltages and grades ranging from A to D, allowing designers to balance cost and performance. The LM4040C50QDBZR specifically targets high-precision applications requiring extended temperature operation.

Replacement Considerations

LM4040C50IDBZR