REF3318AIDBZT

Overview

The REF3318AIDBZT is a precision series voltage reference manufactured by Texas Instruments, housed in a SOT-23-3 surface-mount package. It provides a fixed output voltage of 1.8 V with an initial accuracy of 0.15%. The device exhibits a temperature coefficient of 30 ppm/°C and operates on a supply voltage ranging up to a maximum of 5.5 V. It draws a typical quiescent current of 3.9 µA and supports a maximum shunt current of 5 mA. The component functions within a temperature range of -40°C to +125°C.

Feature Summary

• Delivers high-precision voltage regulation with tight initial accuracy tolerance
• Maintains stable output performance across extended industrial temperature ranges
• Optimized for low-power applications through minimal quiescent current consumption

Applications

• Portable instrumentation systems requiring precise voltage standards
• Data acquisition circuits utilizing analog-to-digital converters
• Battery-powered measurement devices needing efficient power management

Procurement Notes

Verify the specific suffix 'G4' against the official datasheet to confirm compliance with RoHS directives and lead-free manufacturing requirements. Ensure the ordering part number matches the exact package variant and temperature grade specified in the design documentation. Confirm that the supplier provides valid traceability records for the semiconductor components.

Selection Notes

Select this component when a 1.8 V reference is required with stringent drift specifications. Compare the 30 ppm/°C temperature coefficient against system stability needs. Evaluate the 3.9 µA current draw against battery life constraints. Ensure the input voltage remains within the 5.5 V maximum limit while providing sufficient headroom above the 1.8 V output.

Part Context

This part belongs to the REF33xx family of precision voltage references from Texas Instruments. It shares architectural similarities with other members like the REF3312 and REF3320 but differs in its specific 1.8 V output setting. The family is designed for general-purpose precision applications requiring small form factors and low power consumption.

Replacement Considerations

The REF3318AIDCKT serves as a functional substitute offering identical electrical characteristics in an SC-70-3 package.