TL1431AIDT

Overview

The TL1431AIDT is an adjustable shunt voltage reference from STMicroelectronics, housed in an 8-SOIC package. It offers a guaranteed initial accuracy of ±0.25% and a temperature coefficient of 100 ppm/°C. The device operates with a cathode current range of 1 to 100 mA and features a typical dynamic impedance of 0.2 Ω. It supports an input voltage up to 36 V and provides an adjustable output voltage between 2.5 V and 36 V. The component is qualified for automotive applications under AEC-Q100 standards and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Provides precise adjustable voltage referencing with high initial accuracy
• Capable of sinking significant current across a wide operating range
• Designed for stable performance over extended industrial and automotive temperature extremes

Applications

• Precision power supply regulation circuits
• Automotive electronic control unit feedback loops
• Battery management system monitoring
• Industrial process control instrumentation

Procurement Notes

Verify the specific suffix 'DT' corresponds to the 8-SOIC surface-mount package configuration. Confirm that the ±0.25% accuracy grade meets the design requirements, as other variants may offer different tolerances. Ensure the thermal management strategy accounts for the maximum operating temperature of +125°C. Check for RoHS compliance status if required by the target market regulations.

Selection Notes

Select this component when high precision is required for shunt regulation applications. The 8-SOIC package suits automated surface-mount assembly processes. Consider the 100 mA sink capability for driving optocouplers or error amplifier inputs. Verify that the 36 V maximum input voltage aligns with the system's supply rails. The automotive qualification makes it suitable for harsh environment deployments.

Part Context

This part belongs to the TL1431 series of programmable shunt voltage references. The family includes various packages and accuracy grades, such as the TL1431ACCT in SOT-323. The TL1431AIDT specifically denotes the higher precision variant in a standard SOIC footprint, distinguishing it from lower-cost or through-hole alternatives within the same product line.

Replacement Considerations

Compatible substitutes include the TL1431AIYDT, which shares similar electrical characteristics but may differ in packaging format. Other generic adjustable shunt references like the KA431 or LM4041 can functionally replace this part, provided their pinouts and accuracy specifications are verified against the original design constraints.