**The ADR1399KEZ: Defining a New Standard for Voltage Reference Precision**
In the realm of high-precision electronics, the stability and accuracy of a voltage reference are paramount. They serve as the foundational anchor for analog-to-digital and digital-to-analog converters, precision instrumentation, and calibration equipment, where the slightest deviation can lead to significant measurement errors. For years, designers have sought the ideal combination of ultra-low noise, exceptional long-term stability, and minimal temperature drift. The **ADR1399KEZ from Analog Devices** emerges not merely as an incremental improvement but as a device that redefines the benchmark for what a precision voltage reference can achieve.
At the heart of the ADR1399KEZ's superior performance is its revolutionary core design. Unlike traditional buried Zener diode references, the ADR1399KEZ utilizes a **novel, proprietary temperature-stabilized Zener architecture**. This innovation is the key to its breathtaking specifications. It boasts an ultralow temperature drift of **0.2 ppm/°C (typical) and 0.5 ppm/°C (maximum)** over the industrial temperature range (-40°C to +125°C). This level of thermal stability ensures that the output voltage remains virtually unchanged across extreme environmental conditions, a critical factor for applications in industrial automation, aerospace, and scientific research.
Furthermore, the ADR1399KEZ sets a new bar for long-term stability and noise performance. Long-term drift, often a hidden source of error in precision systems, is specified at an exceptionally low **5 ppm/√kHr**. This guarantees that the device's accuracy endures over thousands of hours of operation, reducing the need for frequent recalibration. Complementing this is its ultralow noise performance of **0.22 ppm p-p (0.1 Hz to 10 Hz)**, which ensures that the reference voltage is devoid of the flicker noise that can plague sensitive measurement circuits.
The device provides a precise **6.8 V output voltage**, a value chosen for its optimal headroom in many high-resolution data converter systems. It is offered in a hermetically sealed 8-lead SOIC package, ensuring robustness and reliability against humidity and other environmental stressors. Despite its top-tier performance, the ADR1399KEZ is designed for ease of use, requiring only a single external resistor for fine output voltage adjustment and a bypass capacitor for optimal noise filtering.
The implications of such performance are profound. Test and measurement equipment can achieve higher accuracy levels than ever before. Medical imaging systems, such as MRIs and CT scanners, can produce clearer, more reliable results. Advanced communications infrastructure and precision data acquisition systems can now operate with unprecedented integrity.
In conclusion, the ADR1399KEZ is far more than just another component; it is a statement of engineering excellence. It delivers a combination of low drift, low noise, and phenomenal stability that was previously unattainable in a single, commercially available unit. It empowers designers to push the boundaries of precision and create the next generation of cutting-edge electronic systems.
**ICGOODFIND:** The ADR1399KEZ is a paradigm-shifting voltage reference that establishes a new apex for precision, offering unparalleled temperature drift, noise, and long-term stability to enable the most demanding applications.
**Keywords:** Precision Voltage Reference, Ultralow Temperature Drift, Long-Term Stability, Low Noise, Analog Devices
