LT1009CDR

Voltage Reference Overview

The LT1009CDR is a 2.5-V integrated shunt voltage reference manufactured by Texas Instruments in an 8-pin SOIC package. It provides a fixed output voltage with an initial accuracy of ±0.2% and a temperature coefficient of 25 ppm/°C. The device operates within a junction temperature range of 0°C to +70°C, supporting a maximum shunt current of 10 mA and a minimum operating current of 400 µA.

Voltage Reference Feature Summary

• Provides a stable 2.5-V reference voltage suitable for precision analog circuits
• Features low temperature drift characteristics for consistent performance across operating ranges
• Designed as a compact shunt reference requiring minimal external components

Voltage Reference Applications

• Precision data acquisition systems
• Portable instrumentation requiring stable reference sources
• Battery-powered measurement devices

Voltage Reference Procurement Notes

Verify the specific suffix 'CDR' corresponds to the commercial temperature grade (0°C to +70°C) and SOIC-8 surface-mount packaging. Confirm that the required initial accuracy matches the ±0.2% specification. Ensure the application circuit maintains the minimum cathode current above 400 µA to guarantee regulation stability during operation.

Voltage Reference Selection Notes

Select this component when a fixed 2.5-V reference is required in a small surface-mount footprint. It is appropriate for designs where commercial temperature range suffices and high precision is needed without the complexity of series references. Consider the 10 mA maximum current capability against load requirements.

Voltage Reference Part Context

This part belongs to the LT1009 family of monolithic shunt voltage references from Texas Instruments. These devices are engineered to replace Zener diodes in applications demanding superior stability and lower noise. The family includes variants with different accuracies and packages, such as the TO-92 and TSSOP options.

Voltage Reference Replacement Considerations

LT1009IDR offers extended industrial temperature range (-40°C to +85°C) with ±0.4% accuracy. LT1009CLPM provides through-hole TO-92 packaging. Verify pinout compatibility and thermal management requirements when substituting.