LM285H-1.2/NOPB

Overview

The LM285H-1.2/NOPB is a micropower voltage reference diode manufactured by Texas Instruments, belonging to the LM285 series. It provides a stable nominal output voltage of 1.2V and operates within an industrial temperature range from -40°C to +85°C. The device utilizes a TO-92 through-hole package for reliable mounting. As a shunt precision reference, it maintains regulation with minimal current consumption, making it suitable for battery-powered applications where low power dissipation is critical.

Feature Summary

• Provides a fixed nominal output voltage of 1.2V for precise circuit referencing
• Operates as a micropower shunt reference with low quiescent current requirements
• Designed for industrial temperature environments ranging from -40°C to +85°C
• Utilizes a standard TO-92 three-pin through-hole package for easy integration

Applications

• Battery-powered instrumentation requiring low standby current
• Precision analog-to-digital converter (ADC) reference sources
• Portable measurement devices needing stable voltage baselines
• Temperature sensing circuits utilizing zener breakdown characteristics

Procurement Notes

Verify the component marking and datasheet revision against the manufacturer's official documentation to ensure authenticity. Confirm that the TO-92 package variant matches the specific mechanical outline required for the target PCB footprint. Check for any recent product change notifications regarding material composition or manufacturing site updates before finalizing procurement orders.

Selection Notes

Select this component when a fixed 1.2V reference is required in a through-hole configuration. Ensure the application current does not exceed the maximum shunt current rating specified in the datasheet. Consider thermal management if operating near the upper temperature limit, as self-heating may affect accuracy. Verify compatibility with existing circuit biasing networks designed for shunt reference operation.

Part Context

This part belongs to the LM285 family of micropower voltage references, which includes adjustable variants and other fixed voltage options. The 'H' suffix typically denotes a specific binning or testing category within the series, while '/NOPB' indicates a lead-free, halogen-free compliant version. It serves as a direct replacement for older National Semiconductor equivalents in legacy designs.

Replacement Considerations

• LM285H-1.2
• LM285HY-1.2/NOPB

FAQ

What is the primary function of the LM285H-1.2/NOPB?

It functions as a micropower shunt voltage reference providing a stable 1.2V output for precision analog circuits.

Does this component support surface mount technology?

No, the LM285H-1.2/NOPB is packaged in a TO-92 through-hole case and is not available in a surface-mount variant under this specific part number.