LM385BMX-1.2/NOPB

Overview

The LM385BMX-1.2/NOPB is a micropower shunt voltage reference diode manufactured by Texas Instruments, designed for commercial temperature operation ranging from 0°C to +70°C. It provides a nominal output voltage of 1.235 V with an initial accuracy of ±1%. The device operates within a current range of 15 µA to 20 mA and features a maximum temperature coefficient of 20 ppm/°C. Packaged in an 8-pin Small Outline Integrated Circuit (SOIC) format, it serves as a stable reference source for precision analog circuits.

Feature Summary

• Provides a precise 1.235 V reference output with high initial accuracy
• Operates efficiently at micropower levels starting from 15 µA
• Maintains stability across the commercial temperature range

Applications

• Portable battery-powered instrumentation systems
• Data acquisition and measurement equipment
• Microprocessor-based supervisory circuits

Procurement Notes

Verify that the component designation includes the NOPB suffix to confirm lead-free manufacturing compliance and RoHS adherence. Ensure the ordering part number matches the specific SOIC-8 package variant required for your printed circuit board layout. Confirm the manufacturer origin is Texas Instruments to guarantee specification integrity.

Selection Notes

Select this component when a fixed 1.235 V reference is required in surface-mount designs. It is suitable for applications demanding low quiescent current consumption and tight tolerance specifications. Consider the thermal performance limits if operating near the upper boundary of the commercial temperature range.

Part Context

This device belongs to the LM385 family of micropower voltage references, which are direct replacements for older Zener diodes like the 1N829. The family includes adjustable variants and other fixed voltage options such as 2.5 V. The LM385 series is widely used in industrial and consumer electronics requiring reliable voltage regulation.

Replacement Considerations

• LM385BMX-1.2
• LM385M-1.2/NOPB