SPX432M-L/TR

Overview

The SPX432M-L/TR is a precision shunt adjustable voltage reference manufactured by MaxLinear, Inc. It operates within an output voltage range of 1.24 V to 18 V and supports a maximum shunt current of 80 mA. The device features a minimum reference voltage of 1.24 V with a tolerance of ±1%. It exhibits a temperature coefficient of 50 ppm/°C and functions reliably across an operating temperature range of 0°C to +105°C. The component is housed in a compact SOT-23-3 surface-mount package.

Feature Summary

• Provides stable, adjustable reference voltage via external resistor divider
• Maintains high accuracy with ±1% initial tolerance specification
• Operates effectively over extended industrial temperature ranges

Applications

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

Procurement Notes

Verify the manufacturer designation on the datasheet, as historical records indicate production by Exar Corporation prior to its acquisition by MaxLinear. Confirm that the specific part number suffix corresponds to the SOT-23-3 package and tape-and-reel delivery format. Ensure compatibility with RoHS compliance standards required for your assembly process. Cross-reference the electrical specifications against the official MaxLinear datasheet to confirm performance parameters match your design requirements.

Selection Notes

Select this component when a low-cost, adjustable shunt reference is required for space-constrained designs. The SOT-23-3 package offers a small footprint suitable for dense PCB layouts. Consider the 80 mA maximum current capability for driving moderate loads. Verify that the 50 ppm/°C temperature coefficient meets the thermal stability requirements of the application compared to fixed-bandgap alternatives.

Part Context

This component belongs to the SPX432 series of voltage references, designed for general-purpose precision applications. The series is characterized by its adjustability and low cost. MaxLinear continues the lineage of these parts originally developed by Exar, ensuring continuity for existing designs transitioning from previous manufacturing eras.

Replacement Considerations

SPX432M-L/TR is functionally compatible with other adjustable shunt references in the SOT-23-3 package. Verify pinout alignment and electrical limits before substitution.