REF7050QFKHT

Overview

The REF7050QFKHT is a high-precision series voltage reference from the Texas Instruments REF70 family, housed in an 8-pin LCCC ceramic package. It provides a fixed output voltage of 5 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 performance, specified at 0.23 ppmp-p for the 0.1 Hz to 10 Hz band and 0.35 ppmrms for 10 Hz to 1 kHz. It supports a wide input voltage range up to 18 V, offers a low dropout voltage of 400 mV, and delivers an output current capability of ±10 mA.

Feature Summary

• Hermetically sealed LCCC ceramic package ensures humidity resistance and long-term stability without calibration
• Ultra-low noise profile suitable for precision measurements and noise-sensitive analog front ends
• Integrated shutdown mode controlled by the EN pin to minimize power consumption during inactivity

Applications

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

Procurement Notes

Verify that the specific orderable part number matches the required package style and output voltage variant. Confirm compliance with RoHS and REACH standards as indicated in the product specifications. Ensure the design accounts for the hermetic LCCC package requirements during assembly and handling procedures.

Selection Notes

Select this component when applications demand minimal drift and exceptional noise performance over extended periods. The LCCC package is preferred for environments requiring hermetic sealing and superior long-term stability compared to plastic packages. Verify that the system input voltage remains within the 18 V maximum limit and that the load current does not exceed the ±10 mA specification.

Part Context

This device belongs to the REF70 family of ultra-high-precision voltage references designed for demanding signal chain applications. It complements high-resolution data converters such as the ADS8900B and DAC11001A. The REF7050 specifically provides a 5 V output option alongside other available voltages like 2.5 V and 3.3 V within the same precision family.

Replacement Considerations

REF7050QDGKR (VSSOP package)

FAQ

What is the maximum input voltage allowed for the REF7050QFKHT?

The maximum input voltage (VIN) is 18 V.

How does the enable pin function on this device?

Driving the EN pin low disables the reference output and enters shutdown mode. Driving it above 1.6 V enables the device; leaving it floating allows the internal pull-up to enable it.