REF7033QFKHT

Overview

The REF7033QFKHT is a high-precision series voltage reference from the REF70 family, manufactured by Texas Instruments. It provides a fixed output voltage of 3.3 V with an initial accuracy of ±0.025% and a maximum temperature coefficient of 2 ppm/°C across the -40°C to +125°C operating range. The device features 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 operates with an input voltage up to 18 V, supports ±10 mA output current, and includes a shutdown function via the EN pin. The component is housed in a hermetically sealed LCCC-8 package.

Feature Summary

• Hermetically sealed ceramic LCCC package ensures long-term stability without calibration
• Ultra-low noise performance enables precision measurements in sensitive analog front ends
• Integrated shutdown mode for power management via the enable pin

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-8 package variant when sourcing. Confirm that the orderable part number matches the required 3.3 V output specification within the REF70 family. Ensure compatibility with the REF70EVM development kit if evaluation is required prior to implementation.

Selection Notes

Select this component for applications requiring high accuracy and low drift over wide temperature ranges. The LCCC package is suitable for environments demanding humidity resistance and long-term reliability. Consider the 3.3 V output level and ±10 mA current capability against system load requirements.

Part Context

The REF7033QFKHT belongs to the REF70 family of ultra-high-precision voltage references designed for test and measurement and medical imaging applications. It complements high-resolution data converters such as the ADS8900B and DAC11001A. The family offers multiple voltage options including 1.25 V, 2.5 V, 3 V, 4.096 V, and 5 V in both LCCC and VSSOP packages.

Replacement Considerations

REF7033QDGKR