REF2933AIDBZTG4

Overview

The REF2933AIDBZTG4 is a precision series voltage reference from Texas Instruments, delivering a fixed output of 3.3 V with an initial accuracy of 2%. It features a temperature coefficient of 100 ppm/°C and operates within an input voltage range up to 5.5 V. The device draws a typical quiescent current of 42 µA, with a maximum supply current of 50 µA, and supports a maximum shunt current of 25 mA. It is housed in a compact SOT-23-3 package and functions reliably across an extended industrial temperature range from -40°C to +125°C.

Feature Summary

• Provides stable 3.3 V reference output with 2% initial accuracy
• Operates with low power consumption suitable for battery applications
• Supports high load currents up to 25 mA shunt capability
• Ensures thermal stability with 100 ppm/°C temperature coefficient

Applications

• Portable instrumentation requiring precise voltage references
• Battery-powered measurement systems
• Data acquisition channels
• Industrial process control loops

Procurement Notes

Verify the specific suffix 'G4' indicates RoHS compliance and lead-free construction as per Texas Instruments standards. Confirm the package type matches the required PCB footprint. Ensure the operating environment stays within the specified -40°C to +125°C range. Check for any specific handling requirements due to moisture sensitivity classification. Validate that the 3.3 V output aligns with system design constraints.

Selection Notes

Select this component when a 3.3 V reference with moderate accuracy (2%) is sufficient. It is appropriate for applications prioritizing low power consumption over ultra-high precision. Consider alternatives if tighter temperature coefficients or higher accuracy are required. The SOT-23-3 package offers space efficiency for compact designs. Evaluate the 25 mA shunt current capability against load requirements.

Part Context

This part belongs to the REF29xx series of precision voltage references from Texas Instruments. It shares the same SOT-23-3 form factor and general architecture as other members like the REF2930 and REF2933 variants. The series is designed for cost-sensitive applications requiring reliable performance in industrial and consumer electronics environments.

Replacement Considerations

Direct substitutes include REF2930AIDBZR for 3.0 V output or REF2933AIDBZR for identical 3.3 V performance without the G4 suffix. Verify pinout compatibility and electrical specifications before substitution.