LM385MX-1.2

Overview

The LM385MX-1.2 is a micropower voltage reference diode manufactured by Texas Instruments, continuing the legacy of National Semiconductor products. It operates as a two-terminal bandgap device with a nominal output voltage of 1.235 V. The component is housed in an 8-SOIC surface-mount package and supports a shunt current range up to 20 mA. It functions within a commercial temperature range of 0°C to +70°C.

Feature Summary

• Provides precise 1.235 V reference using bipolar bandgap technology
• Operates efficiently across a wide dynamic current range from microamps to 20 mA
• Features low dynamic impedance for stable regulation under varying load conditions

Applications

• Precision current source circuits
• Portable instrumentation requiring extended battery life
• Low-power analog signal conditioning

Procurement Notes

Verify that the ordering suffix matches the required package and temperature grade. Confirm RoHS compliance status if environmental regulations apply. Ensure the supplier provides documentation confirming the component originates from Texas Instruments or authorized distributors to avoid counterfeit parts.

Selection Notes

Select this component when a stable 1.235 V reference is needed in a surface-mount form factor. It is suitable for designs prioritizing low power consumption and moderate precision. Consider thermal management requirements based on the maximum shunt current and ambient operating conditions.

Part Context

This part belongs to the LM185/LM285/LM385 family of micropower voltage references. The LM385 variant offers improved performance over its predecessors while maintaining pin compatibility. It serves as a cost-effective solution for applications requiring reliable voltage referencing without premium pricing.

Replacement Considerations

LM385MX-1.2/NOPB is a verified equivalent offering lead-free compliance.