LM385BS8-2.5#PBF

Overview

The LM385BS8-2.5#PBF is a micropower two-terminal band gap reference diode manufactured by Analog Devices Inc., housed in an 8-lead plastic SOIC (S8) package. It provides a nominal output voltage of 2.5 V with a guaranteed initial tolerance of ±1%. The device operates within a temperature range of 0°C to 70°C and supports a reverse current range from 20 µA to 20 mA. Key electrical characteristics include a maximum dynamic impedance of 1 Ω, low noise performance, and excellent long-term stability.

Feature Summary

• Guaranteed 1% initial voltage tolerance for precision applications
• Micropower operation with very low power consumption
• Low dynamic impedance ensuring stable reference performance
• Excellent stability over time and temperature variations

Applications

• Portable meter references
• Battery-operated systems
• Panel meters
• Current loop instrumentation

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS status against the manufacturer's latest documentation. Confirm the S8 package dimensions match the PCB footprint requirements. Ensure the operating temperature range of 0°C to 70°C aligns with the system environment. Cross-reference the part number with official Analog Devices distributors to ensure authenticity and traceability.

Selection Notes

Select this component when a precise 2.5 V reference is required in space-constrained designs utilizing surface-mount technology. The S8 package allows for compact board layouts compared to through-hole alternatives. Consider the 0°C to 70°C commercial temperature range suitability for the intended application environment. Evaluate the micropower characteristics against the system's battery life or energy efficiency constraints.

Part Context

This component belongs to the LM185/LM285/LM385 family of micropower voltage references. The 'B' designation specifies the tighter 1% initial voltage tolerance compared to standard versions. The 'S8' suffix identifies the 8-lead plastic small outline package. Analog Devices acquired Linear Technology, which originally developed this series of band gap reference devices.

Replacement Considerations

Consult the LT1004 data sheet for pin-for-pin substitution requiring lower initial tolerance. Review the LT1034 data sheet if guaranteed temperature drift specifications are critical for the design.