LM285LP-1-2

Overview

The LM285LP-1-2 is a micropower shunt voltage reference manufactured by Texas Instruments, providing a fixed output of 1.235 V. It operates within a current range of 20 µA to 20 mA and features an initial accuracy of ±1%. The device exhibits a temperature coefficient of 20 ppm/°C and maintains low noise performance with 60 µVrms in the 10 Hz to 10 kHz bandwidth. Designed for through-hole mounting, it utilizes a TO-92-3 package and functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides a stable 1.235 V reference via shunt topology
• Operates efficiently at microampere-level currents
• Ensures high precision with tight initial tolerance
• Maintains stability across wide thermal variations

Applications

• Analog-to-digital converter (ADC) reference sources
• Portable battery-powered instrumentation
• Sensor interface circuits requiring stable biasing
• Precision measurement equipment

Procurement Notes

Verify the specific suffix configuration against the manufacturer's datasheet to confirm pinout compatibility and electrical tolerances. Ensure the procurement channel provides original manufacturer documentation to validate RoHS compliance and material declarations. Cross-reference the ordering code with official Texas Instruments resources to avoid counterfeit components or incorrect variant substitutions during acquisition.

Selection Notes

Select this component when a fixed 1.235 V reference is required in a through-hole form factor. It is suitable for applications demanding low quiescent current operation and moderate precision. Consider the TO-92-3 package constraints for board layout. Evaluate if the 20 ppm/°C temperature coefficient meets the system's thermal stability requirements compared to higher-grade alternatives.

Part Context

This part belongs to the LM285 family of micropower shunt voltage references. It shares architectural similarities with the LM385 series but offers specific performance characteristics tailored for cost-sensitive and space-constrained designs. The device serves as a fundamental building block for establishing precise voltage levels in mixed-signal systems without requiring external adjustment components.

Replacement Considerations

• LM285LPRE3-1-2
• LM285Z-1.2#PBF

FAQ

What is the minimum operating current for the LM285LP-1-2?

The device requires a minimum cathode current of 20 µA to maintain regulation.

Does the LM285LP-1-2 support adjustable output voltages?

No, this specific model provides a fixed output voltage of 1.235 V.