TL431ACPG

Overview

The TL431ACPG is a three-terminal programmable shunt regulator diode manufactured by onsemi. It operates as a low temperature coefficient Zener reference, adjustable from Vref to 36 V using two external resistors. The device supports a cathode 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 ±1.0% and an equivalent full-range temperature coefficient of 50 ppm/°C. The component functions within an operating ambient temperature range of 0 °C to +70 °C and is housed in a PDIP-8 package.

Feature Summary

• Programmable output voltage capability up to 36 V
• Temperature compensated for operation over the full rated operating temperature range
• Low dynamic output impedance for stable regulation
• RoHS compliant and lead-free construction

Applications

• Digital voltmeters
• Power supplies
• Op amp circuitry

Procurement Notes

Verify the specific suffix 'CPG' corresponds to the PDIP-8 package and 0°C to +70°C temperature grade. Confirm availability status as this part number may be discontinued or subject to change; consult official onsemi documentation for current production lifecycle data before finalizing procurement plans.

Selection Notes

Select this component when a precision shunt reference is required within the commercial temperature range of 0°C to +70°C. Ensure the application cathode current remains between 1.0 mA and 100 mA. Verify that the ±1.0% voltage tolerance meets the system accuracy requirements compared to tighter tolerance variants like the TL431B series.

Part Context

This device 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 power management circuits. The A-series designation indicates a standard voltage tolerance specification suitable for general-purpose applications.

Replacement Considerations

Direct substitutes include other TL431 variants such as TL431BCPG (0.4% tolerance) or TL431CDPG (2.2% tolerance), provided the temperature range and package compatibility are maintained.