Texas Instruments REF7050QFKHT

Overview

REF7050QFKHT from Texas Instruments is a precision 5.0 V series voltage reference in an 8-pin LCCC hermetic ceramic package, delivering ±0.025% initial accuracy, 2 ppm/°C max temperature drift (−40°C to +125°C), 0.23 ppmp-p 0.1–10 Hz noise, and 400 mV dropout at 10 mA-designed for high-resolution data acquisition in semiconductor test equipment and medical imaging front ends.

For engineers reviewing the REF7050QFKHT datasheet, REF7050QFKHT pinout, REF7050QFKHT application, or REF7050QFKHT equivalent, key selection criteria include low 1/f noise performance, long-term stability (35 ppm over 1k hours), humidity-resistant packaging, PSRR of 107 dB at 1 kHz, and compatibility with 1–100 μF low-ESR output capacitors in industrial and safety-critical analog signal chains.

Technical Context

The REF7050QFKHT implements a high-stability bandgap-based series reference architecture with dual-output force-sense topology (OUTF/OUTS) to maintain regulation under varying load and PCB trace impedance. Its internal enable circuitry supports shutdown mode with ≤12 μA quiescent current across −40°C to +125°C.

It operates from 5.4 V to 18 V input (V_DO = 400 mV at 10 mA), sustains ±10 mA output current, and achieves 0.1% turn-on settling in 0.5 ms with 1 μF output capacitance-enabling fast power-up in automated test systems and portable diagnostic devices requiring stable excitation sources.

Key Specifications

Pinout & Package

REF7050QFKHT uses an 8-pin LCCC (ceramic leadless chip carrier) package, 5.00 mm × 5.00 mm body size, hermetically sealed for humidity resistance and long-term drift control in harsh environments.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision voltage reference applications.

Compared with REF7050QDGKR and ADR4550BRZ, REF7050QFKHT uniquely combines hermetic LCCC reliability, 2 ppm/°C drift over full −40°C to +125°C, and force-sense topology-making it the only option qualified for calibration-free operation in medical imaging and semiconductor ATE where long-term parametric stability is non-negotiable.

Availability

REF7050QFKHT is available at Aetrix Electronics and suitable for semiconductor test equipment, precision data acquisition systems, and ultrasound scanner designs requiring stable component supply across extended product lifecycles and global manufacturing sites.

Supply support for REF7050QFKHT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and industrial-grade signal chain solutions.

The REF70 family was designed specifically for high-resolution data converters in test & measurement and medical imaging, prioritizing ultra-low noise, hermetic stability, and wide-temperature operation to replace legacy references in next-generation signal chains.

FAQ

What is the maximum operating temperature for REF7050QFKHT?

The REF7050QFKHT is fully specified from −40°C to +125°C ambient temperature, with all key parameters-including 2 ppm/°C max drift, ±0.025% accuracy, and 0.23 ppmp-p noise-guaranteed across this full industrial range. Its LCCC package enables reliable operation at the upper limit where plastic-packaged alternatives typically derate performance.

Does REF7050QFKHT require external capacitors, and what values are supported?

Yes, REF7050QFKHT requires a minimum 0.1 μF input capacitor and supports 1–100 μF output capacitors with ESR between 1 mΩ and 400 mΩ. This wide capacitor range allows use of low-cost ceramic or tantalum types without compromising stability-unlike many references limited to narrow ESR windows.

How does the force-sense (OUTF/OUTS) architecture improve accuracy in REF7050QFKHT?

The REF7050QFKHT's separate OUTF (force) and OUTS (sense) pins close the regulation loop at the load, compensating for voltage drop across PCB traces and connectors. This maintains true 5.0 V at the ADC reference input even with 100 mΩ series resistance-eliminating a common source of gain error in high-precision systems.

What is the shutdown current consumption of REF7050QFKHT?

In shutdown mode (EN < 0.5 V), REF7050QFKHT draws ≤12 μA over −40°C to +125°C, enabling ultra-low-power sleep states in portable instrumentation and battery-backed data loggers while preserving fast wake-up (<0.5 ms to 0.1% settling).

Is REF7050QFKHT pin-compatible with other members of the REF70 family?

Yes, all REF70 variants-including REF7050QFKHT, REF7025QFKHT, and REF7040QFKHT-share identical 8-pin LCCC (FKH) pinout and footprint. This allows single PCB design reuse across 1.25 V to 5.0 V output options, reducing layout effort and qualification overhead in multi-voltage platform development.