REF3125AQDBZRQ1

Overview

The REF3125AQDBZRQ1 is an automotive-grade series voltage reference from Texas Instruments, designed for high-precision applications in harsh environments. It delivers a fixed output of 2.5V with an initial accuracy of 0.2% and a temperature coefficient of 20ppm/°C. The device operates within a supply voltage range of 2.55V to 5.5V and supports a maximum load current of 10mA. It features low quiescent current consumption of 100µA and functions reliably across an extended temperature range from -40°C to +125°C. Packaged in a compact SOT-23-3 surface-mount format, it meets AEC-Q100 standards for automotive reliability.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for robust performance in vehicle electronics
• High precision stability with 0.2% initial accuracy and low temperature drift of 20ppm/°C
• Capable of sourcing or sinking up to 10mA output current without requiring external load capacitors
• Ultra-low power consumption with typical quiescent current of 100µA suitable for battery-operated systems

Applications

• Automotive sensor signal conditioning circuits
• Data acquisition systems in vehicle control units
• Analog-to-digital converter reference inputs
• Precision measurement instrumentation in automotive environments

Procurement Notes

Verify the specific suffix 'Q1' confirms automotive grade qualification and AEC-Q100 compliance. Ensure the package type matches the required SOT-23-3 footprint. Confirm the temperature range covers the intended operational environment. Check for any specific handling requirements related to moisture sensitivity levels. Validate that the supplier provides traceability documentation required for automotive assembly processes.

Selection Notes

Select this component when automotive reliability and long-term stability are critical. It is suitable for designs requiring precise voltage references in space-constrained PCB layouts. Consider its low power profile for battery-powered automotive modules. Compare against non-automotive grades if cost is a primary driver but ensure environmental ratings meet system specifications. Evaluate thermal management needs given the small package size.

Part Context

This part belongs to the REF31xx family of precision voltage references from Texas Instruments. The 'Q1' designation indicates it is qualified for automotive applications, distinguishing it from standard commercial variants. It shares core electrical characteristics with other REF3125 models but adheres to stricter automotive quality and reliability standards. The family offers various output voltages and accuracies to suit different precision requirements.

Replacement Considerations

Direct substitutes include other AEC-Q100 qualified voltage references from Texas Instruments such as the REF3125AQDBZRG4Q1. Verify pin compatibility and electrical parameters before substitution. Non-automotive equivalents like the REF3125AIDBZR may lack the necessary reliability certifications for automotive use.