LM4040D41IDBZT

Overview

The LM4040D41IDBZT is a precision micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 4.096V with an initial accuracy of 1%. The device operates within an extended temperature range from -40°C to +125°C and features a maximum temperature coefficient of 150 ppm/°C. It requires a minimum cathode current of 45μA and supports a maximum operating current of 15mA. The component is housed in a space-saving SOT-23-3 surface-mount package.

Feature Summary

• Provides stable reference voltage without requiring external output capacitors
• Maintains stability across all capacitive load conditions
• Utilizes fuse and Zener-zap reverse breakdown voltage trim for tight tolerance

Applications

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

Procurement Notes

Verify the specific suffix 'DBZT' corresponds to the SOT-23-3 package and tape-and-reel shipping configuration. Confirm that the 'D' grade designation aligns with the required 1% initial accuracy and 150 ppm/°C temperature coefficient specifications for your design constraints.

Selection Notes

Select this component when a fixed 4.096V reference is needed in a compact SOT-23-3 footprint. It is suitable for applications requiring operation up to 125°C ambient temperature. Consider the 1% tolerance and 150 ppm/°C drift if higher precision grades like A or B are not strictly necessary for the system budget.

Part Context

This part belongs to the LM4040 series of micropower shunt voltage references. The series offers various fixed output voltages including 2.048V, 2.5V, 3V, 5V, 8.192V, and 10V. Different grades (A, B, C, D) provide varying levels of initial accuracy and temperature coefficients to suit different cost-performance requirements.

FAQ

Does the LM4040D41IDBZT require an output capacitor?

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 operating current for this reference?

The typical minimum cathode current required for proper operation is 45μA.