LM185WG-2.5/883

Overview

The LM185WG-2.5/883 is a micropower two-terminal voltage reference diode manufactured by Texas Instruments, designed for high-reliability applications requiring strict environmental compliance. This component provides a stable 2.5V reference output and belongs to the LM185/LM285/LM385 family of adjustable micropower references. It features low dynamic impedance and excellent temperature stability achieved through on-chip trimming. The device operates within a wide current range and offers superior long-term stability and low noise characteristics essential for precision instrumentation.

Feature Summary

• Provides a precise 2.5V reference voltage with tight initial tolerance
• Features extremely low dynamic impedance for stable regulation under varying load conditions
• Exhibits low noise and exceptional long-term stability for critical analog circuits
• Capable of operation across a wide bias current range from microamps to milliamps

Applications

• Precision measurement systems requiring stable reference voltages
• Battery-powered instrumentation utilizing micropower design constraints
• Temperature sensing circuits including thermocouple cold-junction compensation
• High-resolution data acquisition systems demanding low drift performance

Procurement Notes

Verify that the /883 suffix confirms compliance with MIL-PRF-38534 or equivalent military-grade quality standards. Confirm the specific grade (e.g., Class K, H, or L) matches the required radiation hardness and temperature coefficient specifications. Ensure the ceramic package integrity aligns with hermetic sealing requirements for the target environment. Cross-reference the manufacturer lot date code against obsolescence notices.

Selection Notes

Select this component when military-grade reliability and hermetic packaging are mandatory. Compare the specific temperature coefficient suffix against the operational thermal environment. Evaluate the power dissipation limits relative to the maximum allowable junction temperature in sealed enclosures. Consider the physical footprint constraints of the ceramic dual-in-line package during PCB layout planning.

Part Context

This part belongs to the Texas Instruments LM185 series of micropower voltage references, which includes variants like the LM285 and LM385 differentiated primarily by operating temperature ranges. The LM185 variant supports extended industrial and military temperatures. The /883 designation indicates adherence to aerospace and defense procurement standards, distinguishing it from commercial equivalents.

Replacement Considerations

Public confirmed substitute part numbers: LM285-2.5/883B, LM385-2.5/883B.