LM4040C50QDBZTG4

Overview

The LM4040C50QDBZTG4 is a precision micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 5V with an initial accuracy 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 typical and supports a maximum shunt current of 15mA. The component is housed in a space-saving SOT-23-3 package.

Feature Summary

• Provides stable reference voltage with low dynamic impedance and low noise characteristics
• Operates stably with all capacitive loads without requiring external output capacitors
• Designed for portable applications due to micropower consumption and compact packaging

Applications

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

Procurement Notes

Verify the specific ordering suffix 'G4' against the manufacturer's latest documentation to confirm compliance status and any potential changes to pinout or electrical specifications compared to standard variants. Ensure the selected package matches the required PCB footprint and that thermal constraints are met for the intended operating environment.

Selection Notes

Select this component when a 5V reference with 0.5% tolerance is required for extended industrial temperatures. Compare against C-grade industrial variants if the application does not require operation above 85°C, as they may offer different availability or cost structures while maintaining similar electrical performance.

Part Context

This part belongs to the LM4040 series of shunt voltage references, which offers multiple fixed output voltages including 2.048V, 2.5V, 3V, 4.096V, 8.192V, and 10V. The series includes A, B, C, and D grades with varying accuracies and temperature coefficients, packaged in SOT-23, SC-70, and TO-92 formats to suit diverse design constraints.

Replacement Considerations

LM4040C50IDBZT

FAQ

Does the LM4040C50QDBZTG4 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 recommended connection for the NC pin in high-noise environments?

In applications with high electromagnetic interference or significant high-frequency switching noise, it is recommended to connect the NC pin to the anode.