LM4040D50QDBZT

Overview

The LM4040D50QDBZT is a precision micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 5V with an initial accuracy of 1% and a maximum temperature coefficient of 150ppm/°C. The device operates within an extended temperature range from -40°C to +125°C and supports a cathode current up to 15mA. It is housed in a space-saving SOT-23-3 surface-mount package.

Feature Summary

• Provides stable reference voltage without requiring external capacitors for operation
• Maintains low dynamic impedance and low noise characteristics across operating conditions
• Designed for stability with all capacitive loads

Applications

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

Procurement Notes

Verify the specific suffix QDBZT against the latest Texas Instruments Package Option Addendum to confirm the exact pin configuration, marking code, and reel specifications. Ensure the component grade matches the required tolerance specifications for the target application environment before finalizing procurement orders.

Selection Notes

Select this component when a 5V reference with 1% initial accuracy is sufficient for the design requirements. The D-grade specification offers a balance between cost and performance for applications not requiring tighter tolerances found in A or B grades. Confirm that the 150ppm/°C temperature coefficient meets the thermal stability needs of the system.

Part Context

This part belongs to the LM4040 series of micropower shunt voltage references. The 'D' indicates the 1% accuracy grade, while 'Q' denotes the extended temperature rating. The 'DBZ' specifies the SOT-23-3 package type. This series utilizes fuse and Zener-zap reverse breakdown voltage trim during wafer sort to achieve specified tolerances.

Replacement Considerations

LM4040D50IDBZT (Industrial temperature range)

FAQ

Does the LM4040D50QDBZT require an output capacitor?

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

What is the minimum cathode current required for operation?

The typical minimum cathode current is 45μA at 25°C, increasing to 80μA across the full temperature range.