TL1431IDT

Overview

The TL1431IDT is an adjustable shunt voltage reference IC manufactured by STMicroelectronics, housed in an 8-SOIC surface-mount package. It provides a programmable output voltage ranging from 2.5 V to 36 V using two external resistors. The device guarantees temperature stability over the operating range of -40°C to +105°C with a typical dynamic impedance of 0.2 Ω. It supports a cathode current range from 1 mA to 100 mA and offers high precision with tolerances of ±0.4% or ±0.25%. The component features a low temperature coefficient of 100 ppm/°C and is RoHS compliant.

Feature Summary

• Adjustable output voltage capability spanning 2.5 V to 36 V via external resistor network
• High precision voltage tolerance available in ±0.4% and ±0.25% grades
• Wide operational current range supporting sink currents from 1 mA to 100 mA
• Guaranteed thermal stability across extended industrial temperature ranges

Applications

• Precision power supply regulation circuits
• Programmable linear regulators
• Battery-powered equipment voltage references
• Industrial control system monitoring

Procurement Notes

Verify the specific suffix designation against the manufacturer datasheet to confirm the exact voltage tolerance grade (±0.4% or ±0.25%) and temperature rating. Ensure the selected variant matches the required operating temperature range for the target application environment. Confirm package integrity and lead finish specifications prior to integration into the design.

Selection Notes

Select this component when a stable, adjustable reference voltage is required within a compact surface-mount form factor. Consider the ±0.4% or ±0.25% precision options based on circuit accuracy requirements. Evaluate the 1 mA to 100 mA current handling capabilities against load demands. Verify compatibility with the -40°C to +105°C operating range for industrial or automotive environments.

Part Context

The TL1431 series represents a family of programmable shunt voltage references designed for cost-sensitive applications requiring high stability. The IDT suffix indicates a specific tape-and-reel packaging configuration suitable for automated surface-mount assembly processes. This part serves as a foundational reference element in various analog and mixed-signal power management designs.

Replacement Considerations

TL1431AIDT is listed as a parameter-equivalent substitute within the same product family.