LM385BD-2-5

Overview

The LM385BD-2.5 is a Texas Instruments micropower shunt voltage reference IC in an 8-pin SOIC package. It provides a fixed nominal output of 2.5V with an initial accuracy of ±3%. The device operates within a temperature range of 0°C to +70°C and supports a maximum cathode current of 20 mA. Key electrical parameters include a typical temperature coefficient of 150 ppm/°C, a noise level of 120 µVrms (10Hz to 10kHz), and a dynamic impedance of approximately 1 Ω at 25°C.

Feature Summary

• Micropower operation with a wide working current range from 20 μA to 20 mA
• Bandgap reference design offering low dynamic impedance and excellent temperature stability
• Capacitive load tolerance for simplified circuit integration

Applications

• Portable instrumentation circuits
• Battery-powered systems requiring long life
• Current loop instruments

Procurement Notes

Verify the specific suffix and manufacturer source carefully, as this part number appears across multiple vendors including ON Semiconductor and NXP. Confirm RoHS compliance status and lead times directly with the supplier, as availability varies significantly by source. Ensure the selected component matches the required package type and accuracy grade for your specific application needs.

Selection Notes

Select this component when a stable 2.5V reference is needed in surface-mount designs. Consider the ±3% tolerance and 150 ppm/°C temperature coefficient against stricter requirements. Verify that the operating environment stays within the specified commercial temperature range and that the load current remains within the 20 μA to 20 mA window for proper regulation.

Part Context

This device belongs to the LMx85 series of micropower voltage references. It shares core bandgap technology with other variants like the LM385MX and LM385PWR but differs in packaging and specific manufacturing origin. The series is designed for applications prioritizing low power consumption and moderate precision in analog signal conditioning.

Replacement Considerations

LM385MX-2.5/NOPB

FAQ

What is the minimum operating current required for regulation?

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

Does this component support capacitive loads?

Yes, the design includes special tolerance for capacitive loads, making it easier to use in various reference applications.