SPX1431N-L

Overview

The SPX1431N-L is a precision adjustable shunt voltage reference manufactured by Sipex. It operates within an input voltage range of 5.5V to 36V and provides an output voltage that can be adjusted from 2.5V to 36V using external resistors. The device delivers a maximum cathode current of 150mA and maintains high accuracy with a typical initial voltage tolerance of ±0.4%. Designed for robust performance, it functions reliably across an industrial temperature range of -40°C to +125°C.

Feature Summary

• Adjustable output voltage capability via external resistor network
• High precision stability with low initial voltage tolerance
• Wide operating supply voltage range supporting diverse power systems
• Industrial-grade thermal stability for extreme environment operation

Applications

• Precision analog-to-digital converter (ADC) reference sources
• Digital-to-analog converter (DAC) voltage references
• Battery-powered equipment monitoring circuits
• Portable instrumentation voltage regulation

Procurement Notes

Verify the manufacturer designation on the component marking, as Exar and MaxLinear have acquired prior Sipex assets. Confirm the package type matches the required PCB footprint, typically SOT-89 or similar three-terminal configurations. Ensure the specific suffix aligns with the desired tape-and-reel packaging format if automated assembly is planned. Cross-reference datasheets from all relevant entity names to ensure parameter consistency.

Selection Notes

Select this component when a wide input voltage range up to 36V is required alongside precise adjustable output levels. It is suitable for designs needing higher current drive capabilities than standard bandgap references. Consider the thermal performance requirements, as the device supports extended temperature ranges. Evaluate the need for external programming resistors to set the exact target voltage level within the specified operational window.

Part Context

This component belongs to the family of precision shunt voltage references originally developed by Sipex. These devices are widely utilized in data acquisition systems where stable reference voltages are critical. The technology leverages advanced bandgap principles to achieve low drift and high accuracy. Subsequent corporate acquisitions have integrated these products into broader portfolios maintained by Exar and MaxLinear.

Replacement Considerations

Public confirmed substitute part numbers: SPX1431M1-L/TR.