LM4040B33FTA

Overview

The LM4040B33FTA is a precision micropower shunt voltage reference manufactured by Diodes Incorporated. It provides a fixed output voltage of 3.3V with an initial tolerance of ±0.2% at +25°C. The device operates within a wide current range from 60µA to 15mA and maintains stability over 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

• High-precision bandgap circuit offering stable reference voltage across industrial temperatures
• Capable of driving capacitive loads without requiring an output capacitor for stability
• Low power consumption suitable for battery-operated and space-constrained designs
• Compliant with RoHS standards and free from halogen and antimony

Applications

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

Procurement Notes

Verify the specific ordering suffix 'FTA' corresponds to the standard SOT23 package and reel quantity as defined in the manufacturer's ordering information table. Confirm that the B-grade designation matches the required ±0.2% initial accuracy specification for your design. Ensure compatibility with the recommended operating conditions regarding reverse current limits.

Selection Notes

Select this component when a 3.3V reference with high initial accuracy (±0.2%) is required in a small footprint. It is suitable for applications demanding low quiescent current operation down to 60µA. Consider the thermal characteristics and package size if space is limited. Verify that the load conditions remain within the specified 60µA to 15mA operating range to ensure optimal performance.

Part Context

This part belongs to the LM4040 family of micropower shunt voltage references. The family includes variants with different output voltages (2.5V, 3.0V, 4.096V, 5.0V) and accuracy grades (B, C, D). The LM4040B33FTA specifically denotes the 3.3V output version with B-grade precision. Other packages like SC70-5 are noted as end-of-life options.

Replacement Considerations

LM4040C33FTA offers 0.5% accuracy. LM4040D33FTA offers 1% accuracy. LM4040Q versions provide automotive compliance.