LT1009IDRG4

Voltage Reference Overview

The LT1009IDRG4 is a precision shunt voltage reference integrated circuit manufactured by Texas Instruments. It provides a fixed output voltage of 2.5 V with an initial accuracy of ±0.2% and a temperature coefficient of 25 ppm/°C. The device operates within a junction temperature range of -40°C to +85°C and supports a maximum shunt current of 10 mA, with a minimum operating current of 400 µA. It is housed in an 8-pin SOIC package and is supplied in tape-and-reel packaging for automated surface-mount assembly.

Voltage Reference Feature Summary

• Integrated precision shunt reference with factory-trimmed initial accuracy and low temperature drift
• Adjustable reference voltage via dedicated ADJ pin to compensate for system errors
• Low dynamic impedance design ensuring stable performance across wide load current ranges

Voltage Reference Applications

• Precision analog-to-digital converter (ADC) and digital-to-analog converter (DAC) references
• Battery-powered instrumentation requiring low quiescent current
• Digital voltmeters and current loop measurement systems
• Power supply monitoring circuits

Voltage Reference Procurement Notes

Verify the specific suffix 'G4' indicates lead-free and RoHS compliance status as per manufacturer documentation. Confirm the SOIC-8 package dimensions match your PCB footprint requirements. Ensure the operating temperature range meets your environmental specifications. Check for any product change notifications regarding assembly sites or material updates before finalizing procurement.

Voltage Reference Selection Notes

Select this component when a fixed 2.5 V reference with high initial accuracy is required. The adjustable pin allows fine-tuning to eliminate system-level errors without external trim networks. Consider the 400 µA minimum current requirement for low-power designs. Verify that the 10 mA maximum shunt current capability suits your load conditions and thermal dissipation limits.

Voltage Reference Part Context

The LT1009 series consists of precision two-terminal voltage references designed for applications demanding high stability and low noise. The ID variant specifies industrial temperature range operation. The RG4 suffix typically denotes tape-and-reel packaging and lead-free construction. This part serves as a drop-in replacement for many legacy 2.5 V references in data acquisition and control systems.

Voltage Reference Replacement Considerations

LT1009IDR is the non-reel version of the same electrical specification. LT1009CDRG4 offers commercial temperature range (-40°C to +70°C). LM236-2.5 is a functional equivalent but may differ in accuracy and temperature coefficient specifications.