SPX1431M1-L

Overview

The SPX1431M1-L is a precision adjustable shunt voltage reference manufactured by MaxLinear, Inc. It operates within an input voltage range of 2.5V to 36V and provides an adjustable output voltage from 2.5V to 36V. The device features an initial accuracy of ±0.4% and a temperature coefficient of 30ppm/°C. It supports a maximum shunt current of 150mA with a minimum operating current of 1mA. The component is housed in a SOT-89-3 package and functions reliably across an extended temperature range of -55°C to +125°C.

Feature Summary

• Adjustable output voltage capability spanning from 2.5V up to 36V for flexible circuit design
• High precision performance characterized by ±0.4% initial accuracy and low temperature drift
• Robust operational stability with a wide input voltage range and extended industrial temperature rating

Applications

• Precision analog-to-digital converter (ADC) reference sources
• Digital-to-analog converter (DAC) voltage references
• Battery-powered instrumentation requiring stable reference voltages
• Portable equipment power management circuits

Procurement Notes

Verify the specific manufacturer source, as Exar Corporation also produced this part number prior to acquisition by MaxLinear. Confirm that the datasheet specifications align with the required accuracy and temperature range for your application. Ensure the SOT-89-3 package dimensions match your PCB footprint requirements before finalizing procurement decisions.

Selection Notes

Select this component when a high-precision, adjustable shunt reference is needed over a wide voltage range. The ±0.4% accuracy makes it suitable for applications demanding tighter tolerances than standard Zener diodes. Consider the 150mA current capacity for driving moderate loads directly. The SOT-89-3 package offers a compact solution for space-constrained designs requiring surface-mount technology.

Part Context

This component belongs to the SPX431 series of voltage references, which are designed as drop-in replacements for traditional TL431 devices but with improved precision and temperature stability. The SPX1431M1-L variant specifically targets applications requiring higher accuracy and wider operating voltage ranges compared to lower-tier models in the family.

Replacement Considerations

The SPX2431AM-L/TR serves as a compatible alternative offering similar precision characteristics but limited to a 20V maximum output voltage. Verify that the reduced voltage range of the substitute meets the specific circuit requirements before implementation.