REF3033AIDBZRQ1

Overview

The REF3033AIDBZRQ1 is a precision series voltage reference from Texas Instruments, designed for automotive applications with AEC-Q100 qualification. It delivers a fixed output voltage of 3.3 V with an initial accuracy of 0.2%. The device operates within an input voltage range up to 5.5 V and draws a typical quiescent current of 42 uA, with a maximum supply current of 50 uA. It supports a maximum shunt current of 50 uA in its specific configuration. The component functions reliably across an extended temperature range from -40 C to +85 C and is housed in a compact SOT-23-3 surface-mount package.

Feature Summary

• Automotive-grade reliability certified under AEC-Q100 standards for robust performance in vehicle electronics.
• Ultra-low power consumption enables efficient operation in battery-powered and energy-constrained systems.
• High precision stability ensures accurate voltage regulation without requiring external load capacitors.

Applications

• Automotive sensor signal conditioning circuits
• Data acquisition systems requiring stable reference voltages
• Medical instrumentation with strict accuracy requirements

Procurement Notes

Verify the specific suffix 'Q1' confirms AEC-Q100 automotive qualification distinct from commercial variants. Confirm the exact thermal rating matches the -40 C to +85 C specification rather than the broader industrial range found in other REF30xx parts. Ensure the 50 uA shunt current limit aligns with your circuit design constraints compared to higher-current alternatives.

Selection Notes

Select this part when automotive certification is mandatory and low static current is critical. Compare against REF3133AQ1 if higher output current capability is needed, noting the significant difference in shunt current ratings. Verify that the 3.3 V output matches the system requirement and that the SOT-23-3 package fits the PCB layout constraints.

Part Context

This component belongs to the REF30xx family of low-power voltage references. Unlike the REF31xx series which offers higher drive currents, the REF30xx prioritizes minimal quiescent current. The Q1 suffix specifically denotes automotive qualification, differentiating it from standard commercial REF3033AIDBZR parts which may have different temperature ranges or testing criteria.

Replacement Considerations

REF3033AIDBZT is a non-automotive equivalent with similar electrical characteristics but lacks AEC-Q100 certification. REF3133AQDBZRQ1 provides higher output current but consumes more power. Verify temperature range compatibility when substituting commercial parts into automotive designs.