LM4040C30QFTA

Overview

The LM4040C30QFTA is an automotive-compliant precision micropower shunt voltage reference manufactured by Diodes Incorporated. It provides a fixed output voltage of 3.0V with an initial tolerance of ±0.5% at +25°C. The device operates within a wide current range from 60µA to 15mA and maintains stability across an extended temperature range of -40°C to +125°C. It features a maximum temperature coefficient of 100 ppm/°C and low output noise of 45µVRMS in the 10Hz to 10kHz bandwidth. Packaged in a compact SOT23 surface-mount format, it requires no external output capacitor.

Feature Summary

• Automotive compliant design suitable for applications requiring specific change control
• Capable of maintaining excellent stability when used with capacitive loads without requiring an output capacitor
• Offers pin-for-pin compatibility with industry standard LM4040 voltage references

Applications

• Automotive reference voltages
• Automotive data acquisition systems

Procurement Notes

Verify that the component matches the exact part number LM4040C30QFTA to ensure correct voltage and grade specifications. Confirm the package type is SOT23 and check for AEC-Q100 qualification status if automotive compliance is required. Ensure the ordering suffix corresponds to the desired packing quantity and carrier tape width as defined in the manufacturer's documentation.

Selection Notes

Select this component when a stable 3.0V reference is needed in space-constrained automotive designs. The C-grade offers a balanced accuracy of 0.5%. Consider the minimum operating current of 60µA for power budget calculations. Verify that the load conditions do not exceed the maximum reverse current rating of 15mA during operation.

Part Context

This device belongs to the LM4040Q family of bandgap circuits designed specifically for automotive environments. It serves as a high-precision alternative to commercial versions while meeting stricter quality standards. The Q-series supports PPAP documentation and is manufactured in IATF 16949 certified facilities, ensuring consistency for automotive supply chains.

Replacement Considerations

The datasheet identifies the LM4040Q as a pin-for-pin compatible alternative to the industry standard LM4040 voltage reference. Users should verify electrical parameters against the original commercial version to ensure compatibility with existing circuit designs.

FAQ

Is an external output capacitor required for the LM4040C30QFTA?

No, the device is designed to be highly tolerant of capacitive loads and does not require an external output capacitor to maintain stability.

What is the maximum operating junction temperature for this device?

The absolute maximum operating junction temperature is +150°C, although the recommended operating ambient temperature range is -40°C to +125°C.