LM385BD-2.5

Overview

The LM385BD-2.5 is a micropower two-terminal bandgap voltage reference diode manufactured by onsemi. It provides a fixed reference voltage of 2.5 V with an initial tolerance grade of ±3%. The device operates within a current range of 10 µA to 20 mA, featuring low dynamic impedance and stable performance over time and temperature. It is housed in an 8-pin SOIC surface-mount package. Key electrical parameters include a maximum output current of 20 mA, a load regulation of 20 mV, and a temperature coefficient of 80 ppm/°C. The component functions as a shunt regulator with a minimum input voltage of 2.43 V and a maximum input voltage of 2.58 V.

Feature Summary

• Micropower two-terminal bandgap voltage reference design
• Low dynamic impedance for stable operation
• Tight voltage tolerances achieved via on-chip trimming
• Surface mount package availability

Applications

• Portable instrumentation circuits
• Battery-powered regulators
• Analog circuitry requiring extended battery life
• Applications with widely varying supply voltages

Procurement Notes

Verify the specific suffix 'G' or absence thereof against the manufacturer's current datasheet revision to confirm RoHS compliance status. Confirm that the SOIC-8 package dimensions match the target PCB footprint requirements. Ensure the operating environment remains within the specified commercial temperature range to maintain the stated ±3% accuracy. Cross-reference the part number with authorized distributors to validate authenticity and traceability.

Selection Notes

Select this component when a fixed 2.5 V reference is required in space-constrained designs utilizing surface-mount technology. The wide operating current range from 10 µA to 20 mA allows flexibility in biasing networks for various power consumption profiles. Consider the ±3% initial tolerance for applications where higher precision is not critical, offering a cost-effective solution compared to tighter tolerance grades.

Part Context

The LM385 series comprises micropower voltage reference diodes designed for precision applications. The LM385BD-2.5 variant specifically targets the 2.5 V output level within the BD grade packaging. This series is characterized by its ability to operate efficiently at low currents, making it suitable for portable devices. The bandgap architecture ensures thermal stability, distinguishing it from simpler zener-based references.

Replacement Considerations

LM385BD-2.5G