LM185H-1.2-QV

Overview

The LM185H-1.2-QV is a micropower voltage reference diode manufactured by National Semiconductor, now part of Texas Instruments. It provides a stable 1.2 V output and operates within an extended industrial temperature range from -55 °C to +125 °C. The device is housed in a TO-92 three-pin plastic package. It features low dynamic impedance and requires minimal operating current, making it suitable for precision analog circuits where power efficiency and thermal stability are critical requirements.

Feature Summary

• Provides a fixed 1.2 V reference output with high accuracy
• Operates reliably across the full industrial temperature range
• Designed for low-power applications with minimal quiescent current consumption

Applications

• Precision measurement systems requiring stable voltage references
• Battery-powered instrumentation utilizing low standby current
• Temperature-compensated sensor interfaces

Procurement Notes

Verify that the specific suffix QV corresponds to the required qualification level and packaging configuration for your design. Confirm the manufacturer source as National Semiconductor or its successor Texas Instruments to ensure component authenticity and traceability. Check for RoHS compliance status if environmental regulations apply to your assembly process.

Selection Notes

Select this component when a fixed 1.2 V reference is needed with strict temperature stability requirements up to 125 °C. Consider the TO-92 package constraints for board space and thermal dissipation. Ensure the application current draw remains within the specified minimum operating limits to maintain regulation accuracy.

Part Context

This device belongs to the LM185/LM285/LM385 family of adjustable micropower voltage references. These components are widely used in analog signal conditioning and data acquisition systems. The LM185 variant specifically offers a fixed 1.2 V output, distinguishing it from the adjustable versions within the same series.

Replacement Considerations

Compatible substitutes include LM285H-1.2-QV and LM385H-1.2-QV from the same manufacturer family. Cross-manufacturer equivalents such as AMS285-1.2 may be considered if pinout and electrical characteristics match.