TL431ACDG

Overview

The TL431ACDG is a three-terminal programmable shunt regulator diode manufactured by onsemi in an SOIC-8 package. It operates as a low temperature coefficient zener, programmable from the internal reference voltage to 36 V using two external resistors. The device supports a wide operating current range of 1.0 mA to 100 mA with a typical dynamic impedance of 0.22 Ω. It features a reference input voltage tolerance of ±1% and an equivalent full-range temperature coefficient of 50 ppm/°C typical. The component functions as either a positive or negative voltage reference.

Feature Summary

• Programmable output voltage capability up to 36 V
• Temperature compensated for operation over the full rated operating temperature range
• Low output noise voltage characteristics
• Pb-Free, Halogen Free/BFR Free and RoHS Compliant construction

Applications

• Digital voltmeters
• Power supplies
• Op amp circuitry

Procurement Notes

Verify the specific suffix 'D' confirms the SOIC-8 surface mount package configuration. Confirm the 'AC' designation aligns with the required ±1% initial accuracy and the 0 °C to +70 °C ambient temperature operating range. Ensure compliance with Pb-Free and RoHS material standards matches project specifications.

Selection Notes

Select this component when a precision shunt regulator is needed within the commercial temperature range. The SOIC-8 package suits surface mount designs requiring compact footprints. Verify that the cathode current requirements fall within the 1.0 mA to 100 mA operational window for optimal regulation performance.

Part Context

This part belongs to the TL431A, B Series family of programmable precision references. It serves as a monolithic IC voltage reference designed to replace traditional zener diodes in various analog and digital circuits. The device integrates internal compensation to maintain stability across its operating range.

Replacement Considerations

TL431ACDT (STMicroelectronics)

FAQ

Can the TL431ACDG operate as a negative voltage reference?

Yes, because it operates as a shunt regulator, it can be configured to function as either a positive or negative voltage reference.

What determines the output voltage of the TL431ACDG?

The output voltage is programmable from the reference voltage to 36 V using two external resistors connected to the Reference pin.