onsemi

LM385D-2.5

LM385D-2.5 Description

The LM385D-2.5 from onsemi is a precision 2.5V shunt voltage reference designed for stable performance in low-power applications. Housed in an 8-SOIC package, this obsolete but reliable component offers a ±3% tolerance and operates within a 0°C to 70°C (TA) temperature range. Its shunt reference topology allows flexibility in circuit design, making it suitable for systems requiring a fixed voltage reference with minimal current draw. The device features a low cathode current of 30 µA and delivers 20 mA output current, ensuring efficiency in power-sensitive designs. With a temperature coefficient of 80ppm/°C (typical) and 120µVrms noise (10Hz to 10kHz), it balances accuracy and stability for precision applications.

LM385D-2.5 Features

• Fixed 2.5V output with ±3% tolerance for consistent voltage regulation.
• Ultra-low cathode current (30 µA), ideal for battery-powered or energy-efficient systems.
• Shunt reference architecture enables easy integration into diverse circuit configurations.
• 80ppm/°C temperature coefficient ensures minimal drift across operating conditions.
• Low noise (120µVrms) for precision analog and mixed-signal applications.
• Surface-mount 8-SOIC package for compact PCB designs.
• REACH Unaffected and MSL 1 (Unlimited) for robust handling and compliance.

LM385D-2.5 Applications

The LM385D-2.5 excels in scenarios demanding stable voltage references with low power consumption:

• Portable instrumentation (e.g., handheld meters, sensors) due to its low current draw.
• Power management circuits requiring precise voltage thresholds.
• ADC/DAC reference in data acquisition systems, leveraging its low noise.
• Battery-backed systems where energy efficiency is critical.
• Industrial control systems benefiting from its temperature stability.

Conclusion of LM385D-2.5

While marked obsolete, the LM385D-2.5 remains a viable choice for designs prioritizing low power, stability, and simplicity. Its shunt configuration, low noise, and tight tolerance make it suitable for precision applications, though newer alternatives may offer improved specs. Engineers valuing proven reliability in portable, industrial, or analog systems may still find this reference advantageous. For modern designs, verifying availability or exploring onsemi's updated offerings is recommended.