LM285DR-1-2

Overview

The LM285DR-1-2 is a fixed shunt precision voltage reference from Texas Instruments, delivering a nominal output of 1.235V. It features an initial accuracy of 1% and a temperature coefficient of ±20ppm/°C. The device operates within a supply current range of 10µA to 20mA and supports a working temperature range from -40°C to +85°C. Packaged in an 8-pin SOIC format, it is designed for surface-mount applications requiring stable voltage references.

Feature Summary

• Provides a precise fixed reference voltage of 1.235V with high initial accuracy.
• Features low temperature drift for stable performance across industrial temperatures.
• Operates efficiently within a wide cathode current range suitable for micro-power circuits.

Applications

• Precision analog-to-digital converter (ADC) reference inputs
• High-resolution digital-to-analog converter (DAC) biasing
• Calibration standards for measurement instrumentation

Procurement Notes

Verify the specific suffix DR-1-2 against the official datasheet to confirm the 1.235V fixed output and 1% tolerance. Ensure the SOIC-8 package matches the design footprint. Confirm RoHS compliance status if required by project specifications.

Selection Notes

Select this component when a fixed 1.235V reference is required in a surface-mount configuration. It is suitable for designs needing tighter temperature stability than standard Zener diodes but do not require adjustable outputs. Consider the 1% initial accuracy for calibration requirements.

Part Context

This part belongs to the LM285 series of micropower shunt voltage references. The series includes both fixed and adjustable variants, offering options for 1.235V and 2.5V outputs in various packages including TO-92 and SOIC. The LM285DR-1-2 specifically addresses the need for a compact, fixed-voltage reference solution.

Replacement Considerations

LM285DR-1-2/NOPB