REF2940AIDBZR

Overview

The REF2940AIDBZR is a precision series voltage reference from Texas Instruments, delivering a fixed output of 4.096 V in a compact SOT-23-3 package. It features an initial accuracy of 2% and a temperature coefficient of 100 ppm/°C across the industrial range of -40°C to +125°C. The device operates with a typical supply current of 42 µA and supports a maximum shunt current of 25 mA. It functions within an input voltage range up to 5.5 V, making it suitable for low-power applications requiring stable voltage regulation.

Feature Summary

• Provides a fixed 4.096 V output with high stability over temperature variations
• Operates with ultra-low quiescent current for battery-powered efficiency
• Capable of sourcing significant load current while maintaining regulation
• Designed for direct integration into space-constrained surface-mount layouts

Applications

• Portable instrumentation systems requiring precise voltage rails
• Battery-operated measurement devices needing long-term stability
• Industrial sensor interfaces demanding accurate signal conditioning
• Data acquisition systems utilizing analog-to-digital conversion

Procurement Notes

Verify the complete part number including suffixes against official manufacturer documentation to ensure correct packaging and temperature grade. Confirm that the specific revision matches your design requirements. Cross-reference datasheet specifications for electrical limits before finalizing procurement decisions to avoid compatibility issues.

Selection Notes

Choose this component when a fixed 4.096 V reference is required with moderate accuracy and low power consumption. It is ideal for designs where board space is limited due to the small SOT-23-3 footprint. Consider thermal management if operating near maximum current limits or ambient temperatures.

Part Context

This device belongs to the REF29xx series of low-power voltage references from Texas Instruments. The series offers various fixed output voltages optimized for portable and industrial applications. The REF2940 specifically targets applications needing a standard 4.096 V rail for ADCs and DACs.

Replacement Considerations

Check for pin-compatible alternatives within the same family such as other REF29xx variants with different output voltages. Verify if higher precision options like the REF30xx series are needed for stricter temperature coefficient requirements.