REF5025SHKQ

Overview

The REF5025SHKQ is a high-temperature series voltage reference manufactured by Texas Instruments, designed for precision applications requiring stability under extreme thermal conditions. It provides a fixed output voltage of 2.5 V with an initial accuracy tolerance of ±0.9%. The device operates within a supply voltage range of 3.25 V to 18 V and draws a typical supply current of 1.5 mA. It features a low noise performance of 7.5 µVpp/V in the 0.1 Hz to 10 Hz frequency band. The component supports a maximum shunt current of 7 mA and functions reliably across an extended temperature range from -55°C to +210°C. It is housed in an 8-CFP surface-mount package.

Feature Summary

• Capable of stable operation in extreme environments with a maximum junction temperature rating up to 210°C
• Delivers a precise fixed 2.5 V output suitable for high-accuracy signal conditioning circuits
• Minimizes low-frequency interference through reduced 0.1 Hz to 10 Hz peak-to-peak noise characteristics

Applications

• High-temperature industrial sensor interfaces
• Aerospace and defense instrumentation systems
• Downhole drilling measurement equipment

Procurement Notes

Verify that the specific application environment does not exceed the absolute maximum operating temperature of +210°C, as this component is engineered for extreme thermal stress scenarios distinct from standard commercial parts. Confirm that the power supply voltage remains strictly within the 3.25 V to 18 V input window to ensure proper regulation and prevent damage. Ensure the PCB layout accommodates the unique 8-CFP package dimensions to maintain mechanical integrity during thermal cycling.

Selection Notes

Select this part when standard commercial voltage references fail due to excessive heat, as it offers a specialized high-temperature variant within the REF5025 family. Note that the initial accuracy is ±0.9%, which is lower than other variants like the REF5025EIDR; choose this only if thermal endurance outweighs the need for tighter initial tolerance. Verify that the 7 mA output current capability meets the load requirements of the target circuit design.

Part Context

This component belongs to the REF5025-HT series, a subset of Texas Instruments' precision voltage reference portfolio specifically optimized for harsh environments. Unlike standard commercial versions limited to 125°C or 150°C, this variant extends operational limits significantly. It shares the fundamental series reference architecture but utilizes materials and processes capable of withstanding prolonged exposure to temperatures reaching 210°C without degradation.

Replacement Considerations

No public confirmed substitute part numbers are available.