LM385AYMX-2.5

Overview

The LM385AYMX-2.5 is a micropower shunt voltage reference manufactured by National Semiconductor, now part of Texas Instruments. It provides a fixed output voltage of 2.5V with an initial accuracy tolerance of ±0.4%. The device operates within a temperature range of -40°C to +85°C and features a low temperature coefficient of 15 ppm/°C. Packaged in an 8-SOIC surface-mount format, it functions as a two-terminal reference diode suitable for precision applications requiring stable voltage regulation.

Feature Summary

• Provides a precise fixed 2.5V reference output via a two-terminal shunt configuration
• Maintains high stability across industrial temperatures with a low 15 ppm/°C temperature coefficient
• Delivers tight initial accuracy of ±0.4% for demanding measurement circuits

Applications

• Precision analog-to-digital converter (ADC) reference sources
• Data acquisition systems requiring stable voltage rails
• Battery-powered instrumentation circuits

Procurement Notes

Verify the manufacturer status carefully, as National Semiconductor was acquired by Texas Instruments. Confirm that the specific suffix 'A' meets your required temperature grade (-40°C to +85°C). Ensure the 8-SOIC package dimensions align with your PCB footprint design before finalizing procurement orders.

Selection Notes

Select this component when a fixed 2.5V reference is needed with tighter accuracy than standard variants. Compare against the LM385B variant if higher initial accuracy is not critical but cost reduction is desired. Ensure the shunt current requirements fit within the device's operational limits for your specific circuit design.

Part Context

This component belongs to the LM185/LM285/LM385 family of adjustable micropower voltage references. While the base LM385 series offers adjustable options, the LM385AYMX-2.5 is a fixed-voltage version optimized for industrial environments. It serves as a key building block for linear regulators and monitoring circuits.

Replacement Considerations

Consider the LM385BYMX-2.5/NOPB or LM385IMX-2.5/NOPB from Texas Instruments as direct functional equivalents. Verify that the replacement parts maintain the same 8-SOIC package and industrial temperature range specifications.