REF3133AQDBZRQ1

Overview

The REF3133AQDBZRQ1 is an automotive-grade, fixed-output series voltage reference from Texas Instruments. It provides a precise 3.3 V output with an initial accuracy of ±0.2% and a maximum temperature coefficient of 20 ppm/°C across the full operating range. The device operates within a supply voltage range of 3.35 V to 5.5 V and draws a typical quiescent current of 100 µA. It supports a maximum shunt current of 10 mA and functions reliably in temperatures from -40°C to +125°C. Packaged in a compact SOT-23-3 surface-mount case, it meets AEC-Q100 qualification standards for automotive applications.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability in vehicle environments
• Ultra-low power consumption with typical 100 µA supply current suitable for battery-operated systems
• High precision stability featuring ±0.2% initial accuracy and low temperature drift characteristics
• Robust load regulation capability supporting up to 10 mA sink/source current without external components

Applications

• Automotive electronic control units requiring stable reference voltages
• Portable and battery-powered instrumentation devices
• Data acquisition systems in harsh thermal environments
• Medical equipment requiring high precision analog references

Procurement Notes

Verify the specific suffix codes to confirm the exact package variant and reel configuration before ordering. Ensure that the procurement channel provides valid traceability documentation required for automotive component sourcing. Confirm compliance with RoHS directives and check for any recent product change notices affecting marking or assembly sources. Validate that the received parts match the specified AEC-Q100 qualification status.

Selection Notes

Select this component when designing circuits for automotive environments demanding high reliability and precision. It is ideal for applications where low power consumption is critical alongside strict accuracy requirements. Consider the SOT-23-3 footprint constraints and the need for a wide operating temperature range. Compare against non-automotive grades if cost sensitivity outweighs the need for AEC-Q100 certification in non-vehicle applications.

Part Context

This part belongs to the REF31xx family of micropower series voltage references designed by Texas Instruments. The family offers various fixed output voltages in a tiny SOT-23 package. The 'AQ' designation indicates automotive qualification, while 'REF3133' specifies the 3.3 V output version. This series is engineered to replace larger, higher-power references in space-constrained portable and industrial designs.

Replacement Considerations

Direct functional substitutes include other AEC-Q100 qualified series references from Texas Instruments such as the REF3033AQDBZRQ1, though note differences in temperature coefficients and quiescent current. Cross-brand alternatives like the LM4132 may fit electrically but lack guaranteed automotive qualification. Verify pinout compatibility and thermal performance before substituting.