SPX431AN-L/TR

Overview

The SPX431AN-L/TR is a three-terminal adjustable shunt voltage reference IC manufactured by MaxLinear, Inc. It provides a fixed output voltage of 2.503V with an initial accuracy tolerance of ±0.5%. The device features a temperature coefficient of 30 PPM/°C and operates within a maximum input voltage of 2.515V. Packaged in a lead-free TO-92-3 case, it serves as a highly accurate bandgap reference for precision applications.

Feature Summary

• Provides a fixed positive output voltage of 2.503V
• Delivers tight initial accuracy with ±0.5% tolerance
• Utilizes a highly accurate bandgap reference architecture
• Offers low temperature drift characteristics

Applications

• Precision voltage reference sources
• Shunt regulator circuits
• Error amplifier references
• Battery monitoring systems

Procurement Notes

Verify the manufacturer designation on the component marking to confirm origin from MaxLinear, Inc., noting historical lineage from Exar or Signetics assembly sites. Ensure the package type matches the specified TO-92-3 form factor. Confirm that the specific suffix indicates the fixed 2.503V variant rather than an adjustable version. Cross-reference the datasheet revision to ensure compliance with current electrical specifications.

Selection Notes

Select this component when a stable, fixed 2.5V reference is required without external programming resistors. The ±0.5% accuracy suits applications demanding tighter tolerances than standard adjustable references. Consider the TO-92-3 package constraints for thermal management and board space. Evaluate the 30 PPM/°C temperature coefficient against the operating environment's thermal range requirements.

Part Context

This part belongs to the SPX431 family of shunt voltage references, which are widely used in power management and signal conditioning. The 'L' suffix typically denotes specific manufacturing qualifications or lead-free processing. It functions similarly to industry-standard TL431 devices but offers distinct performance characteristics defined by MaxLinear's design parameters.

Replacement Considerations

Compatible substitutes include the TL431AIDBZR or LM431AIMX-2.5, provided they meet the 2.503V fixed output requirement. Verify that alternative packages match the TO-92-3 footprint if pin compatibility is critical. Check datasheets for equivalent initial accuracy and temperature coefficient values.