LM285DRE4-1-2

Overview

The LM285DRE4-1-2 is a micro-power 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 -40°C to +85°C and features a low dynamic impedance characteristic typical of Zener-based references. It supports a maximum shunt current of 20 mA and requires a minimum operating current of 10 µA for regulation. Packaged in an SOIC-8 surface-mount format, it serves as a stable reference element for precision analog circuits.

Feature Summary

• Provides a precise 1.235 V fixed reference voltage suitable for high-accuracy applications
• Operates over an extended industrial temperature range from -40°C to +85°C
• Features low power consumption with a minimum operating current of 10 µA
• Utilizes a standard SOIC-8 surface-mount package for compact board integration

Applications

• Precision data acquisition systems requiring stable voltage references
• Battery-powered instrumentation utilizing low quiescent current components
• Analog-to-digital converter (ADC) reference inputs
• Portable measurement devices needing reliable shunt regulation

Procurement Notes

Verify the specific suffix 'E4' indicates lead-free composition and RoHS compliance status according to the manufacturer's latest documentation. Confirm that the SOIC-8 pinout matches the target PCB footprint design. Ensure the application circuit maintains the required minimum cathode current of 10 µA to guarantee proper voltage regulation under all load conditions.

Selection Notes

Select this component when a fixed 1.235 V reference is required in a surface-mount configuration. It is appropriate for designs prioritizing low power consumption and moderate accuracy. Compare against adjustable variants if variable reference voltages are needed. Consider thermal management requirements based on the maximum shunt current limits specified in the datasheet.

Part Context

This part belongs to the LM285 family of micro-power shunt voltage references. The family includes both fixed and adjustable versions available in through-hole and surface-mount packages. The LM285 series is designed to replace traditional Zener diodes in applications requiring better stability and lower noise characteristics while maintaining low power operation.

Replacement Considerations

LM285DR-1-2: Pin-compatible alternative with similar electrical specifications.

FAQ

What is the minimum operating current required for the LM285DRE4-1-2?

The device requires a minimum cathode current of 10 µA to maintain proper voltage regulation.

Is the LM285DRE4-1-2 an adjustable or fixed voltage reference?

It is a fixed voltage reference providing a nominal output of 1.235 V.