LT1431IN8#PBF

Voltage Reference Overview

The LT1431IN8#PBF is a programmable shunt voltage reference manufactured by Analog Devices, housed in an 8-pin PDIP package. It operates within a cathode voltage range of 2.5V to 36V and supports a maximum sink current of 100mA. The device features a guaranteed initial accuracy of ±0.4% and a temperature coefficient of 50ppm/°C. Designed for through-hole mounting, it functions effectively across an industrial temperature range from -40°C to +85°C.

Voltage Reference Feature Summary

• Provides adjustable output voltage configuration via external resistors
• Features low reference pin current for minimal loading effects
• Includes internal circuitry for stable operation with capacitive loads

Voltage Reference Applications

• Precision linear power supplies
• Programmable switching regulators
• Battery-operated equipment monitoring

Voltage Reference Procurement Notes

Verify the specific suffix 'IN8' corresponds to the PDIP-8 through-hole package variant rather than surface-mount options. Confirm RoHS compliance status and check for lead-free manufacturing specifications required by your assembly process. Ensure the ordering code matches the exact tolerance grade needed for your design.

Voltage Reference Selection Notes

Select this component when a through-hole DIP package is required for prototyping or high-reliability applications. It serves as a direct replacement for TL431-based designs where higher precision and lower noise are necessary. Consider the 100mA sink capability for driving optocouplers or feedback networks directly without additional buffering stages.

Voltage Reference Part Context

This part belongs to the LT1431 family of adjustable shunt references, offering superior performance over standard TL431 equivalents. It provides tighter initial accuracy and better temperature stability. The PDIP-8 package facilitates easy breadboarding and manual soldering during development phases compared to smaller surface-mount packages.

Voltage Reference Replacement Considerations

LT1431IS8#PBF (Surface Mount SOIC-8 variant)

Voltage Reference FAQ

Is the LT1431IN8#PBF pin-compatible with the TL431?

Yes, the LT1431 maintains pin compatibility with the TL431, allowing for direct upgrades in existing designs.

What is the minimum operating cathode current?

The device requires a minimum cathode current of 1mA to maintain regulation.