LM385Z-2.5/LFT1

Overview

The LM385Z-2.5/LFT1 is a two-terminal shunt voltage reference manufactured by National Semiconductor, providing a nominal output of 2.5V. It utilizes a TO-92 plastic package with three pins and supports through-hole mounting. The device operates within a commercial temperature range up to 70°C and features a temperature coefficient of ±150 ppm/°C. It is designed for applications requiring stable reference voltages in low-power circuits.

Feature Summary

• Provides a fixed 2.5V reference voltage output
• Operates in shunt mode as a two-terminal device
• Utilizes a standard TO-92 through-hole package

Applications

• Low-power instrumentation circuits
• Microcontroller reference voltage sources
• Battery-powered measurement systems

Procurement Notes

Verify the manufacturer designation carefully, as National Semiconductor's semiconductor division was acquired by Texas Instruments. Ensure the specific suffix matches the required tolerance and temperature grade. Confirm RoHS compliance status for current production runs, as older batches may differ from modern equivalents.

Selection Notes

Select this component when a stable 2.5V reference is needed in a through-hole design. Consider the ±150 ppm/°C temperature coefficient for thermal stability requirements. Evaluate the maximum operating temperature limit of 70°C against the environmental conditions of the target application.

Part Context

This part belongs to the LM385 family of adjustable micropower voltage references. The 'Z' suffix typically denotes a specific tape-and-reel or bulk packaging variant depending on the era, while 'LFT1' indicates the specific binning or testing configuration for the 2.5V output version.

Replacement Considerations

Texas Instruments LM385MX-2.5/NOPB is listed as an available substitute for related LM385 variants.