REF7025QFKHT

Overview

The REF7025QFKHT is a high-precision series voltage reference from Texas Instruments, featuring a fixed 2.5 V output in an 8-pin LCCC ceramic package. It delivers ±0.025% accuracy and a maximum temperature coefficient of 2 ppm/°C across the -40°C to +125°C range. The device exhibits ultra-low noise (0.23 ppmp-p at 0.1 Hz to 10 Hz) and excellent long-term stability (35 ppm over 1000 hours). It supports input voltages up to 18 V with a quiescent current of 6 mA and provides ±10 mA output current capability.

Feature Summary

• Hermetically sealed humidity-resistant LCCC ceramic package for long-term drift stability
• Ultra-low low-frequency noise enabling precision measurements in sensitive analog front ends
• High power supply rejection ratio and low dropout voltage for strict transient requirements
• Flexible operation with stable performance using low-ESR output capacitors

Applications

• Semiconductor test equipment
• Precision data acquisition systems
• Ultrasound scanners
• X-ray systems
• Industrial instrumentation

Procurement Notes

Verify the specific suffix QFKHT corresponds to the hermetic LCCC package variant when sourcing. Confirm that the component meets RoHS and REACH compliance standards required for your manufacturing process. Ensure the ordering documentation explicitly references the Texas Instruments datasheet SNAS781G for accurate electrical specifications and pin configuration details.

Selection Notes

Select this part for applications requiring hermetic sealing and minimal long-term drift without calibration. The LCCC package is suitable for harsh environments where moisture resistance is critical. Compare against VSSOP variants if space constraints are tighter but hermeticity is not required. Ensure the system can accommodate the 6 mA quiescent current draw during active operation.

Part Context

This component belongs to the REF70 family of ultra-high-precision voltage references designed for demanding signal chain applications. The family includes various output voltage options such as 1.25 V, 3.3 V, and 5 V. The REF7025QFKHT specifically utilizes the FKH package code to denote the 8-pin LCCC form factor, distinguishing it from the plastic VSSOP alternatives within the same product line.

Replacement Considerations

REF7025QDGKR

FAQ

What is the purpose of the EN pin on the REF7025QFKHT?

The EN pin serves as a device enable control. Driving it low disables the reference output and enters shutdown mode, while leaving it floating allows the internal pull-up to enable the device.

How does the LCCC package affect the long-term stability of the REF7025QFKHT?

The hermetically sealed LCCC package protects the internal circuitry from environmental factors, contributing to the specified long-term stability of 35 ppm over 1000 hours at 35°C.