LM385BXM-2.5

Overview

The LM385BXM-2.5 is a micropower shunt voltage reference IC manufactured by National Semiconductor, now part of Texas Instruments. It operates as a two-terminal band-gap regulator diode in the SOIC-8 package. The device provides a fixed output voltage of 2.5V with an initial accuracy of ±1.5%. It functions within a current range of 20 µA to 20 mA and supports an operating temperature range from 0°C to +70°C.

Feature Summary

• Micropower two-terminal band-gap voltage regulation
• Fixed 2.5V output voltage
• Shunt mode operation capability

Applications

• Precision voltage references
• Portable instrumentation
• Battery-powered systems

Procurement Notes

Verify the manufacturer designation carefully, as National Semiconductor assets were acquired by Texas Instruments. Ensure the suffix 'NOPB' is present if RoHS compliance is required. Confirm the specific tolerance grade (B) matches the design requirements for initial accuracy. Check package integrity upon receipt.

Selection Notes

Select this component when a stable 2.5V reference is needed in space-constrained designs using surface-mount technology. The B-grade variant offers tighter initial accuracy compared to standard grades. Consider the thermal performance within the 0°C to +70°C range for industrial applications.

Part Context

This part belongs to the LM385 family of micropower voltage references, which includes variants like LM185 and LM285. These devices are widely used as precision references in analog circuits. The 'XM' suffix indicates the SOIC narrow package, while 'B' denotes the specific accuracy class.

Replacement Considerations

LM385BMX-2.5/NOPB is a confirmed equivalent part number offering identical electrical characteristics and pinout compatibility.