REF5045AIDGKR

Overview

The REF5045AIDGKR is a precision series voltage reference manufactured by Texas Instruments, housed in an 8-VSSOP surface-mount package. It provides a fixed output voltage of 4.5 V with an initial accuracy of 0.05% and a temperature coefficient of 3 PPM/C. The device operates within an input voltage range up to 18 V and supports a maximum shunt current of 10 mA. It functions at supply currents of 800 uA across a wide operating temperature range from -40 C to +125 C.

Feature Summary

• Delivers high-precision voltage regulation with low noise characteristics suitable for sensitive analog circuits.
• Features very low drift over temperature to maintain stability in varying thermal environments.
• Designed for low power consumption applications through efficient quiescent current operation.

Applications

• High-resolution data acquisition systems requiring stable reference voltages
• Precision instrumentation amplifiers and signal conditioning circuits
• Medical equipment and industrial process control systems

Procurement Notes

Verify the specific suffix GKR indicates reel packaging when ordering. Confirm the A grade designation matches required initial accuracy specifications. Ensure the VSSOP-8 footprint aligns with PCB layout constraints. Check moisture sensitivity levels for proper storage and reflow soldering profiles according to manufacturer guidelines.

Selection Notes

Select this component when a 4.5 V output is specifically required rather than standard 2.5 V or 5 V options. Consider the 3 PPM/C temperature coefficient for applications demanding minimal thermal drift. Evaluate the 800 uA supply current against system power budgets. Compare the 0.05% initial accuracy against lower-cost alternatives if tighter tolerances are not critical.

Part Context

This part belongs to the REF50xx family of low-noise, very low drift precision voltage references from Texas Instruments. The REF5045 variant specifically targets the 4.5 V output segment, complementing other outputs like 2.5 V and 5 V within the same series. It shares architectural similarities with the REF5045AIDGKT but differs in packaging format.

Replacement Considerations

REF5045AIDGKT serves as a direct functional substitute with identical electrical characteristics but utilizes cut-tape packaging instead of reel. Other REF5045 variants may offer different packages such as SOIC-8 (REF5045AID) but require verification of pinout compatibility and thermal performance differences.