LM4040C33FTA

Overview

The LM4040C33FTA is a precision micropower shunt voltage reference from Diodes Incorporated, providing a fixed 3.3V output with ±0.5% initial tolerance at +25°C. It operates within a wide current range of 60µA to 15mA and maintains stability across an extended temperature range of -40°C to +125°C. The device features a maximum temperature coefficient of 100 ppm/°C and low noise characteristics. Packaged in a compact SOT-23 surface-mount format, it requires no external output capacitor for stable operation.

Feature Summary

• Compact SOT-23 surface-mount package designed for space-constrained applications
• Capable of maintaining excellent stability when driving capacitive loads without requiring an output capacitor
• Operates efficiently over a wide current range from 60µA to 15mA, supporting power-restricted designs
• Compliant with RoHS standards and manufactured using green molding materials

Applications

• Battery powered equipment
• Precision power supplies
• Portable instrumentation
• Data acquisition systems

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and reel specifications. Ensure compatibility with required operating temperatures and load conditions before procurement. Confirm that the selected component meets all necessary regulatory compliance standards for the intended application environment.

Selection Notes

Select this component for applications requiring a stable 3.3V reference with high accuracy. Consider the ±0.5% tolerance and low temperature coefficient for precision requirements. Evaluate the SOT-23 package size against available board space constraints. Verify that the operating current range aligns with the system's power budget and load requirements.

Part Context

This part belongs to the LM4040 family of bandgap circuits, which offers various fixed output voltages including 2.5V, 3.0V, 4.096V, and 5.0V. The C-grade designation indicates a ±0.5% initial tolerance at +25°C. The family is known for its micro-power consumption and robust performance in industrial temperature ranges, making it suitable for a broad range of electronic devices.

Replacement Considerations

LM4040B33FTA (0.2% tolerance)

FAQ

How should Pin 3 be handled in the SOT-23 package?

Pin 3 must be left floating or connected to Pin 2 due to the electrical contact between them resulting from the die attachment.

What is the typical noise voltage specification?

The typical noise voltage is 35 µVRMS measured between 10Hz and 10kHz at an operating current of 100µA.