LM385DG4-1-2

Overview

The LM385DG4-1-2 is a micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 1.235 V with an initial accuracy of ±1%. The device operates within a temperature range of 0°C to +70°C and features a low temperature coefficient of 20 ppm/°C. It supports a maximum shunt current of 20 mA and is housed in an 8-pin SOIC surface-mount package.

Feature Summary

• Provides a stable 1.235 V reference voltage with high precision
• Operates with micropower consumption suitable for battery applications
• Features low temperature drift for consistent performance across operating ranges

Applications

• Precision data acquisition systems
• Battery-powered instrumentation
• Portable measurement devices

Procurement Notes

Verify the specific suffix G4 indicates lead-free composition and compliance with RoHS directives as per Texas Instruments documentation. Confirm the 8-SOIC package dimensions match your PCB footprint requirements. Ensure the 1.235 V fixed output aligns with your circuit design needs rather than adjustable variants.

Selection Notes

Select this component when a precise 1.235 V reference is required in a surface-mount format. The ±1% tolerance offers higher accuracy than standard LM385 versions. Consider the 20 mA current limit for load driving capabilities and ensure the 0°C to +70°C industrial temperature range meets environmental specifications.

Part Context

This part belongs to the LM385 family of micropower voltage references from Texas Instruments. It serves as a drop-in replacement for older National Semiconductor versions, maintaining functional compatibility while offering modern packaging and manufacturing standards. The DG4 designation specifies the SOIC-8 package variant.

Replacement Considerations

LM385D-1-2 is a direct predecessor. LM385BDRG4-1-2 offers similar electrical characteristics in the same package.