LM4040D33QFTA

Overview

The LM4040D33QFTA is a precision micropower shunt voltage reference manufactured by Diodes Incorporated. It provides a fixed output voltage of 3.3 V with an initial accuracy of 1%. The device operates within an industrial temperature range from -40 °C to +125 °C and features a maximum temperature coefficient of 150 ppm/°C. It is housed in a compact SOT-23-3 surface-mount package and supports a maximum shunt current of 15 mA. The component is AEC-Q100 qualified for automotive applications.

Feature Summary

• AEC-Q100 qualified for automotive reliability standards
• High precision with 1% initial accuracy at 25 °C
• Stable operation over the full industrial temperature range

Applications

• Automotive electronic systems requiring stable voltage references
• Portable battery-powered equipment due to low power consumption
• Industrial control systems operating in harsh environments

Procurement Notes

Verify the specific suffix QFTA confirms AEC-Q100 qualification status directly on the manufacturer's official datasheet or product selection guide. Ensure the ordering information matches the required 3.3 V output and 1% tolerance specifications. Confirm the SOT-23-3 package type aligns with your PCB footprint requirements before finalizing procurement.

Selection Notes

Select this component when automotive-grade reliability is mandatory alongside precise voltage regulation. The 1% accuracy suits applications where tighter tolerances are unnecessary, offering a cost-effective solution. Consider the 150 ppm/°C temperature coefficient against environmental thermal variations to ensure system stability meets design constraints.

Part Context

This part belongs to the LM4040 series of micropower shunt voltage references from Diodes Incorporated. The series offers various fixed output voltages and accuracy grades. The 'D' indicates 1% accuracy, while 'Q' denotes automotive qualification. This family is designed for space-constrained designs requiring high stability and low operating currents.

Replacement Considerations

Check for other LM4040 variants with different output voltages or accuracy grades if electrical parameters do not match. Verify pinout compatibility with alternative manufacturers' shunt references before substitution.