LM385BD-1.2R2

Overview

The LM385BD-1.2R2 is a micropower two-terminal bandgap voltage reference diode manufactured by onsemi. It provides a fixed nominal output voltage of 1.235 V with an initial tolerance grade of 1.0%. The device operates within a wide current range from 10 µA to 20 mA, featuring low dynamic impedance and low noise for stable performance over time and temperature. It is housed in an SOIC-8 surface-mount package and is rated for commercial operation temperatures between 0°C and +70°C.

Feature Summary

• Provides a precise 1.235 V reference voltage with 1.0% initial accuracy
• Operates efficiently across a wide current range from 10 µA to 20 mA
• Features exceptionally low dynamic impedance and low noise characteristics
• Designed for stable long-term operation with minimal temperature coefficient

Applications

• Portable instrumentation circuits requiring extended battery life
• Micropower analog circuitry and precision regulators
• Battery-powered systems with widely varying supply voltages

Procurement Notes

Verify the specific suffix 'R2' against official onsemi documentation to confirm tape-and-reel packaging specifications and exact lot traceability requirements. Ensure the component matches the SOIC-8 package outline and commercial temperature rating (0°C to +70°C) specified in the datasheet before integration into production designs.

Selection Notes

Select this component when a high-precision 1.235 V reference is required in a surface-mount format. The 1.0% tolerance grade offers tighter accuracy than standard grades, making it suitable for applications demanding strict voltage regulation without external trimming. Consider the 10 µA minimum operating current for ultra-low power standby modes.

Part Context

This part belongs to the LM385 series of micropower voltage references, which are based on bandgap technology. The series includes variants with different voltage outputs (1.235 V and 2.500 V) and tolerance grades. The 'B' designation typically indicates the 1.0% tolerance grade, while 'D' denotes the SOIC-8 surface-mount package.

Replacement Considerations

LM385BD-1.2/NOPB (Texas Instruments): Pin-compatible alternative with similar electrical characteristics and package type.