LM385D-1.2R2G

Overview

The LM385D-1.2R2G is a micropower two-terminal bandgap voltage reference diode manufactured by onsemi. It provides a nominal output voltage of 1.235V with an initial accuracy of ±2.0%. The device operates within a current range of 10 µA to 20 mA and features low dynamic impedance. It is housed in an 8-pin SOIC surface-mount package, measuring 5mm x 4mm x 1.5mm. The component is rated for commercial operation between 0°C and +70°C.

Feature Summary

• Provides stable 1.235V reference via two-terminal bandgap topology
• Operates efficiently across wide current range from 10 µA to 20 mA
• Features low dynamic impedance for consistent regulation under varying loads

Applications

• Portable instrumentation requiring extended battery life
• Micropower analog circuitry and regulators
• Precision current source designs

Procurement Notes

Verify the specific suffix R2G corresponds to tape-and-reel packaging when sourcing. Confirm the manufacturer is onsemi, as Texas Instruments also produces this part number. Ensure the ±2.0% tolerance grade matches application requirements rather than assuming higher precision grades like 1.0% or 1.5% are included.

Selection Notes

Select this component for applications needing a low-cost, stable voltage reference with minimal quiescent current. The 8-pin SOIC package suits automated surface-mount assembly. Verify that the 0°C to +70°C commercial temperature range meets environmental constraints, as the LM285 variant offers wider -40°C to +85°C coverage if needed.

Part Context

This part belongs to the LM285/LM385 series of micropower voltage references. The 'LM385' designation indicates a commercial temperature rating (0°C to +70°C), distinguishing it from the industrial-rated LM285. The 'D' suffix denotes the SOIC plastic package, while '1.2' specifies the 1.235V output voltage.

Replacement Considerations

LM385D-1.2G is a direct equivalent from onsemi. LM385BD-1.2R2G offers tighter ±1.0% tolerance. LM285D-1.2R2G provides the same electrical characteristics but with an extended industrial temperature range of -40°C to +85°C.