LM285BYMX-1.2/NOPB

Overview

The LM285BYMX-1.2/NOPB is a micropower shunt precision voltage reference manufactured by Texas Instruments, housed in an SOIC-8 surface-mount package. It provides a fixed output voltage of 1.235 V with an initial accuracy of 1%. The device operates within a temperature range of -40°C to +85°C and features a temperature coefficient of 150 PPM/°C. It supports a maximum shunt current of 20 mA and a minimum operating current of 10 µA. This component belongs to the LM285.2 series and is designed for applications requiring stable, low-power voltage references in compact electronic systems.

Feature Summary

• Provides a fixed 1.235 V reference voltage with high initial accuracy
• Operates as a micropower shunt reference with low minimum current consumption
• Designed for surface-mount installation in compact SOIC-8 packages

Applications

• Portable battery-powered instrumentation
• Data acquisition systems
• Microprocessor supply monitoring
• Handheld meters

Procurement Notes

Verify that the specific part number matches the required fixed voltage output of 1.235 V and the SOIC-8 package type. Confirm that the temperature range and accuracy specifications align with the target application requirements. Ensure compatibility with existing PCB footprints and soldering processes for surface-mount devices. Check for any specific handling or storage conditions mandated by the manufacturer datasheet.

Selection Notes

Select this component when a precise, fixed 1.235 V reference is needed in a small surface-mount form factor. Consider the 1% initial accuracy and 150 PPM/°C temperature coefficient for thermal stability requirements. Evaluate the micropower characteristics if low quiescent current is critical for battery life. Compare against adjustable variants if flexibility in reference voltage is preferred over fixed precision.

Part Context

This part belongs to the LM285 family of micropower shunt voltage references from Texas Instruments. It shares architectural similarities with other members like the LM285M/NOPB but differs in its fixed output voltage specification. The 'NOPB' suffix indicates lead-free construction and compliance with RoHS standards. It is distinct from switching regulators in the LM285x series, serving specifically as a passive reference element rather than an active power converter.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.