LM385AXM-2.5

Overview

The LM385AXM-2.5 is a micropower shunt voltage reference manufactured by National Semiconductor, now part of Texas Instruments. It provides a fixed 2.5V output with an initial accuracy of ±1%. The device operates within a current range of 20 µA to 20 mA and features a temperature coefficient of 150 ppm/°C. Designed for surface-mount applications, it utilizes an 8-SOIC package. The component supports an operating temperature range from 0°C to 70°C.

Feature Summary

• Provides stable 2.5V reference voltage in a compact surface-mount package
• Operates efficiently at low currents starting from 20 µA
• Maintains specified accuracy across standard industrial temperature ranges

Applications

• Portable battery-powered instrumentation
• Data acquisition systems requiring precise voltage references
• Industrial process control circuits

Procurement Notes

Verify the manufacturer status as National Semiconductor is integrated into Texas Instruments. Confirm the specific suffix 'AXM' matches the required package and temperature grade. Check for RoHS compliance status as older batches may differ. Ensure the source document explicitly lists this exact part number to avoid confusion with similar variants like LM385MX-2.5.

Selection Notes

Select this component when a fixed 2.5V reference is needed in an 8-SOIC package. Consider the 150 ppm/°C temperature coefficient for thermal stability requirements. Verify that the 20 µA minimum operating current suits the low-power design constraints. Compare against LM385B series if tighter initial accuracy is required.

Part Context

The LM385 series includes adjustable and fixed voltage references available in various packages. The LM385AXM-2.5 belongs to the fixed 2.5V subset. It shares architectural similarities with the LM185 and LM285 series but differs in temperature rating and packaging options. This specific variant targets industrial applications requiring surface-mount integration.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.