REF3333AIDBZR

Overview

The REF3333AIDBZR is a precision series voltage reference IC manufactured by Texas Instruments, housed in a SOT-23-3 surface-mount package. It provides a fixed output voltage of 3.3 V with an initial accuracy tolerance of ±0.15%. The device exhibits a temperature coefficient of drift at 30 ppm/°C and operates within an input voltage range of 3.5 V to 5.5 V. Typical supply current is 3.9 µA, while maximum output current capability is 5 mA. It functions reliably across an extended industrial temperature range from -40°C to +125°C.

Feature Summary

• Delivers high precision with ±0.15% initial accuracy and low temperature drift for stable reference performance.
• Features ultra-low power consumption suitable for battery-operated and portable applications.
• Provides robust output drive capability with up to 5 mA continuous load current.
• Operates stably without external load capacitors, simplifying circuit design.

Applications

• Portable instrumentation and handheld measurement devices
• Data acquisition systems requiring precise analog references
• Battery-powered sensor interfaces and signal conditioning circuits
• Industrial process control loops and loop-powered transmitters

Procurement Notes

Verify the specific suffix DBZR indicates reel packaging when ordering. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Ensure input voltage remains within the specified 3.5 V to 5.5 V window during operation. Check for any recent product change notices regarding marking or assembly sites.

Selection Notes

Select this component when a balance of high precision (±0.15%) and extremely low quiescent current (3.9 µA) is required in a minimal footprint. It is preferable over higher current references like the REF30xx series when power conservation is critical. Consider the REF3233 if lower noise is needed but larger packages are acceptable.

Part Context

This part belongs to the REF33xx family of voltage references from Texas Instruments, designed for applications demanding high stability and low power. The family includes variants with different output voltages and package options such as SC70-3 and UQFN-8. The REF3333 specifically targets the 3.3 V rail requirement in modern low-power electronics.

Replacement Considerations

Direct pin-compatible substitutes include other members of the REF33xx series with identical pinouts but potentially different accuracies or voltages. Verify thermal characteristics and noise specifications against the original design requirements before substitution.