LM385BLP-2-5

Overview

The LM385BLP-2-5 is a micropower shunt voltage reference manufactured by Texas Instruments. It provides a nominal output voltage of 2.5V with an initial accuracy tolerance of ±1%. The device operates within a wide current range from 20 µA to 20 mA, ensuring stable regulation across varying load conditions. It features a low dynamic impedance and excellent temperature stability, characterized by a temperature coefficient of ±20 ppm/°C. The component is housed in a TO-226-3 (TO-92) through-hole package and supports an operating temperature range from 0°C to 70°C.

Feature Summary

• Provides precise 2.5V reference voltage with high initial accuracy
• Operates efficiently over a wide current range for micropower applications
• Features low dynamic impedance for improved regulation performance
• Ensures thermal stability with a low temperature coefficient

Applications

• Portable battery-powered instrumentation
• Precision analog-to-digital converter references
• Temperature measurement systems
• Current loop transmitters

Procurement Notes

Verify the specific suffix 'BLP' corresponds to the required ±1% tolerance grade and TO-226-3 package configuration. Confirm that the commercial temperature range (0°C to 70°C) aligns with system requirements. Ensure sourcing channels provide genuine TI components to maintain specified electrical characteristics and long-term reliability standards.

Selection Notes

Select this component when a fixed 2.5V reference with tighter than standard tolerance is required in a through-hole form factor. It serves as a direct replacement for older LM285/LM385 series parts where higher precision is necessary. Consider the 20 µA minimum current requirement for biasing circuit design to ensure proper operation without excessive power consumption.

Part Context

This part belongs to the LMx85 family of micropower zener-based voltage references. These devices utilize bandgap technology to achieve superior temperature stability compared to traditional zener diodes. The LM385 variant specifically targets commercial temperature ranges, offering a balance between cost, performance, and availability for general-purpose electronic designs.

Replacement Considerations

LM385BLP-2-5/NOPB

FAQ

What is the minimum operating current for the LM385BLP-2-5?

The device requires a minimum cathode current of 20 µA to maintain proper regulation and voltage stability.

How does the LM385BLP-2-5 handle capacitive loads?

The internal design provides special tolerance to capacitive loads, making it easier to use in most reference applications without external compensation components.