SPX1431M1-L/TR

Overview

The SPX1431M1-L/TR is an adjustable shunt voltage reference manufactured by MaxLinear. It operates within a supply voltage range of 2.5V to 36V and provides an output voltage that can be adjusted across the same range. The device supports a maximum shunt current of 150mA and features an initial accuracy of 0.5%. It is housed in a lead-free SOT-89-3 package with tape/reel packaging.

Feature Summary

• Adjustable precision shunt regulation for stable voltage referencing
• Wide operating input voltage range up to 36V
• High initial accuracy for precise circuit calibration

Applications

• Precision voltage references in measurement systems
• Voltage regulation in industrial control circuits
• Reference sources for analog-to-digital converters

Procurement Notes

Verify the manufacturer designation, as this component has been produced by Exar Corporation and SIPEX prior to corporate acquisitions. Confirm the specific datasheet revision matches the required electrical tolerances. Ensure the SOT-89-3 package footprint aligns with the target PCB design. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Selection Notes

Select this component when an adjustable shunt regulator is required rather than a fixed LDO or series reference. The wide input voltage capability suits applications with varying supply rails. Verify that the load current requirements do not exceed the 150mA limit. Consider thermal dissipation capabilities inherent to the SOT-89 package for high-current operation scenarios.

Part Context

This part belongs to the SPX1431 family of shunt voltage references. It serves as a cost-effective alternative to Zener diodes requiring tighter tolerance specifications. The component is widely used in power management designs where a stable reference node is critical for feedback loops.

Replacement Considerations

SPX431AM1-L/TR is a verified substitute within the MaxLinear portfolio offering similar shunt reference functionality.