LM285AMX-2.5

Overview

The LM285AMX-2.5 is a micropower voltage reference diode manufactured by National Semiconductor, now part of Texas Instruments. It provides a fixed output voltage of 2.5 V with an initial accuracy tolerance of 1.5%. The device operates within a junction temperature range of -40°C to +125°C and is housed in a surface-mount SOIC-8 package. It functions as a shunt regulator requiring a minimum operating current of 10 µA.

Feature Summary

• Provides a stable 2.5 V reference voltage suitable for precision applications
• Operates at micropower levels with low quiescent current consumption
• Designed for surface-mount integration via standard SOIC-8 packaging

Applications

• Portable battery-powered instrumentation
• Data acquisition systems
• Microprocessor supervisory circuits

Procurement Notes

Verify the manufacturer designation carefully, as National Semiconductor was acquired by Texas Instruments. Ensure the suffix 'MX' corresponds to the correct tape-and-reel packaging variant. Confirm RoHS compliance status if required by specific environmental regulations. Cross-reference datasheet revisions to ensure parameter consistency with current design requirements.

Selection Notes

Select this component when a fixed 2.5 V reference is needed in a compact surface-mount form factor. The 1.5% initial accuracy is sufficient for general-purpose applications but may require calibration for high-precision tasks. Consider thermal management capabilities given the wide operating temperature range up to 125°C.

Part Context

This device belongs to the LM285 family of micropower voltage references. It shares functional similarities with the LM385 series but offers distinct performance characteristics tailored for specific power and accuracy requirements within the same product lineage.

Replacement Considerations

The LM285B-2.5 offers tighter initial accuracy tolerance. The LM385-2.5 is a compatible alternative with similar functionality but different electrical specifications.