REF2940AIDBZT

Overview

The REF2940AIDBZT is a precision series voltage reference manufactured by Texas Instruments, housed in an SOT-23-3 surface-mount package. It provides a fixed output voltage of 4.096 V with an initial accuracy of 2% and a temperature coefficient of 100 ppm/°C. The device operates within an input voltage range up to 5.5 V and supports a maximum shunt current of 25 mA. Quiescent current consumption is typically 42 µA, with a maximum rating of 50 µA. It functions reliably across an extended industrial temperature range from -40°C to +125°C.

Feature Summary

• Provides stable 4.096 V reference output suitable for high-resolution data acquisition systems
• Features low power consumption with typical quiescent current of 42 uA
• Designed for operation in harsh environments with extended temperature range capability

Applications

• Analog-to-digital converter (ADC) reference inputs
• Digital-to-analog converter (DAC) voltage sources
• Precision measurement instrumentation circuits

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging configuration when sourcing. Confirm the 'A' grade designation corresponds to the 2% initial accuracy specification required for your application tolerance levels. Ensure the SOT-23-3 footprint matches your PCB layout constraints. Cross-reference the manufacturer part number against official TI documentation to validate authenticity and revision status before procurement.

Selection Notes

Select this component when a compact SOT-23-3 form factor is required alongside moderate precision specifications. The 100 ppm/°C temperature coefficient offers a balance between cost and performance for general-purpose applications. Consider the 2% initial accuracy limit if tighter tolerances are needed, as higher-grade alternatives exist within the same family. Evaluate the 42 µA quiescent current against battery life requirements for portable designs.

Part Context

This part belongs to the REF29xx series of low-power, precision voltage references from Texas Instruments. The series utilizes bandgap technology to deliver stable outputs in small packages. The REF2940 variant specifically targets the 4.096 V output level, which is a standard reference value for many microcontroller and ADC interfaces. It complements other series like REF30xx which offer tighter temperature coefficients at potentially higher costs.

Replacement Considerations

The REF2940AIDBZR is a direct functional substitute differing only in packaging format (cut tape vs. reel). Other REF2940 variants may be considered if different accuracy grades or packaging options are required.