TL1431ACZ

Overview

The TL1431ACZ is an adjustable shunt voltage reference from STMicroelectronics, housed in a TO-92-3 through-hole package. It features a nominal reference voltage of 2.5 V with an initial accuracy of ±0.4%. The device supports an output voltage range from 2.5 V to 36 V and operates within a temperature range of -20°C to +70°C. Key electrical specifications include a maximum input voltage of 37 V, a cathode current range of 1 mA to 100 mA, and a temperature coefficient of 90 ppm/°C.

Feature Summary

• Provides adjustable output voltage capability between 2.5 V and 36 V using two external resistors
• Delivers high precision with an initial accuracy of ±0.4% for stable reference performance
• Supports a wide sink current range from 1 mA to 100 mA with low dynamic impedance

Applications

• Precision voltage regulation in power supply circuits
• Programmable linear regulators requiring stable reference points
• Battery management systems needing accurate voltage monitoring

Procurement Notes

Verify the specific suffix 'ACZ' against the manufacturer's latest datasheet to confirm pinout compatibility and tolerance grades. Ensure the procurement source provides valid RoHS compliance documentation. Cross-reference the part number with official STMicroelectronics distribution channels to avoid counterfeit components. Confirm that the TO-92-3 package dimensions match the target PCB footprint requirements before finalizing orders.

Selection Notes

Select the TL1431ACZ when a through-hole solution with ±0.4% accuracy is required for shunt regulator applications. This model is suitable for designs operating within the -20°C to +70°C ambient temperature range. Consider alternative packages such as SOT-23 or SOIC-8 if surface-mount technology is preferred for automated assembly processes.

Part Context

The TL1431ACZ belongs to the TL1431 family of programmable shunt voltage references. This series is widely used in industrial and consumer electronics for feedback control loops. The component serves as a cost-effective alternative to fixed voltage references, offering flexibility in setting output levels while maintaining thermal stability across standard operating conditions.

Replacement Considerations

Direct substitutes include the TL1431ACZT (tape and reel version) and the TL1431ACZ-AP. Parameter-equivalent options from other manufacturers may require verification of pin compatibility and thermal characteristics.