LM4040B41FTA

Overview

The LM4040B41QFTA is an automotive-compliant precision micropower shunt voltage reference manufactured by Diodes Incorporated. It provides a fixed output voltage of 4.096 V with an initial tolerance of ±0.2% at +25°C. The device operates within a wide current range of 60 µA to 15 mA and maintains stability over an extended temperature range from -40°C to +125°C. It features a maximum temperature coefficient of 100 ppm/°C and is housed in a compact SOT-23 surface-mount package.

Feature Summary

• Automotive compliant with AEC-Q100 qualification and PPAP capability for specific change control requirements
• High precision B-grade performance offering ±0.2% initial accuracy at room temperature
• Capable of maintaining excellent stability when driving capacitive loads without requiring external output capacitors

Applications

• Automotive reference voltages
• Automotive data acquisition systems

Procurement Notes

Verify the complete part number includes the 'Q' suffix, indicating automotive compliance. Confirm that the ordering suffix matches the required tape and reel packaging specifications. Ensure the design accounts for the electrical contact between Pin 2 and Pin 3 in the SOT-23 package, requiring Pin 3 to be left floating or connected to Pin 2.

Selection Notes

Select this component for designs requiring high accuracy in space-constrained automotive environments. The B-grade tolerance suits applications needing tight voltage regulation. Verify that the operating current remains within the specified 60 µA to 15 mA range to ensure optimal performance and stability under varying load conditions.

Part Context

This device belongs to the LM4040Q family of bandgap circuits designed as pin-for-pin compatible alternatives to industry standard references. It is manufactured in IATF 16949 certified facilities and utilizes green molding materials that are lead-free, halogen-free, and antimony-free.

Replacement Considerations

LM4040B41QFTA

FAQ

How should Pin 3 be handled during PCB layout?

Pin 3 must be left floating or connected directly to Pin 2 because the die is attached to Pin 3, creating an electrical contact between them.

Is an output capacitor required for stability?

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