REF3440SQDBVRQ1

Overview

The REF3440SQDBVRQ1 is an automotive-grade series voltage reference from Texas Instruments, designed for precision applications requiring low drift and low power consumption. It provides a fixed output voltage of 4 V with an initial accuracy of 0.05% and a temperature coefficient of 6 ppm/°C. The device operates within an input voltage range up to 12 V and supports a maximum shunt current of 10 mA. It functions reliably across an extended temperature range from -40°C to +125°C and is housed in a compact SOT-23-5 surface-mount package.

Feature Summary

• Automotive qualification ensuring reliability under harsh environmental conditions
• Low-drift performance maintaining stability over wide temperature variations
• Compact SOT-23-5 packaging suitable for space-constrained designs

Applications

• Automotive sensor signal conditioning
• Data acquisition systems
• Precision measurement instrumentation

Procurement Notes

Verify the specific suffix SQDBVRQ1 against official Texas Instruments documentation to confirm automotive grade status and pinout configuration. Ensure compatibility with your PCB footprint and thermal management requirements. Cross-reference the datasheet for humidity sensitivity handling instructions during assembly.

Selection Notes

Select this component when a stable 4 V reference is required in automotive environments. Consider the 6 ppm/°C temperature coefficient for high-precision needs. Evaluate the 95 µA quiescent current against system power budgets. Confirm that the SOT-23-5 package fits the mechanical constraints of the target application.

Part Context

This part belongs to the REF34x family of low-power, low-drift voltage references. It shares architectural similarities with other members like the REF3430 and REF3450 but offers a distinct 4 V output level. The Q1 suffix denotes automotive qualification, aligning it with other TI automotive components such as the TLV9061SQDBVRQ1 operational amplifier.