LM285BXZ-1.2

Overview

The LM285BXZ-1.2 is a micro-power shunt voltage reference diode manufactured by National Semiconductor, now part of 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 -40°C to +85°C and features a typical temperature coefficient of 80 ppm/°C. It supports a maximum shunt current of 20 mA and requires a minimum operating current of 10 µA. The component is housed in an 8-pin SOIC package.

Feature Summary

• Provides a stable 1.235 V reference voltage suitable for precision applications
• Micro-power design minimizes energy consumption in battery-operated systems
• High initial accuracy ensures reliable performance across manufacturing batches

Applications

• Precision analog-to-digital converter (ADC) reference sources
• Battery-powered measurement instruments requiring low power consumption
• Portable electronic devices utilizing shunt regulation techniques

Procurement Notes

Verify the manufacturer designation on the datasheet, as National Semiconductor assets are managed by Texas Instruments. Confirm the specific suffix 'XZ' corresponds to the SOIC-8 package variant. Ensure compliance with RoHS directives if required for your assembly process. Cross-reference the part number with official distributor catalogs to confirm availability and authenticity before procurement.

Selection Notes

Select this component when a fixed 1.235 V reference is required with tight initial accuracy. It is appropriate for designs prioritizing low quiescent current over high load capability. Consider the SOIC-8 package constraints for PCB layout. Evaluate thermal management requirements given the operating temperature range limits.

Part Context

This part belongs to the LM285 series of micro-power voltage references. The series includes adjustable variants and other fixed voltage options. The LM285 family is designed for applications where power efficiency and stability are critical. It serves as a fundamental building block for signal conditioning circuits.

Replacement Considerations

Compatible substitutes include the LM385BZ-1.2 and LM285D-1.2R2G from onsemi. Verify pinout compatibility and electrical specifications such as temperature coefficient and initial accuracy before substitution.