**The ADR440ARMZ: A 096V Ultra-Low-Noise XFET® Voltage Reference for Precision Applications**

In the realm of 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, data acquisition systems, and precision instrumentation, directly determining system performance. The **ADR440ARMZ from Analog Devices** stands out as a premier solution in this critical function, providing a **fixed 4.096V output** with exceptional characteristics that set a high bar for precision.

At the heart of the ADR440ARMZ's superior performance is its proprietary **XFET® (eXtra implanted junction Field-Effect Transistor) architecture**. This technology offers a significant advantage over traditional buried zener and bandgap reference designs. It achieves an outstandingly **low noise level of less than 1.8 μVp-p (0.1 Hz to 10 Hz)**, which is crucial for minimizing errors in high-resolution systems. Furthermore, the XFET core provides excellent long-term stability and a very low temperature drift coefficient of just **3 ppm/°C (max)**, ensuring consistent accuracy across a wide operating temperature range.

The device is meticulously designed for ease of use and integration. It requires only a single external capacitor for noise filtering and stability, simplifying board design. With a low supply current of 1 mA and an ability to operate from a supply voltage ranging from 4.5V to 18V, it offers excellent power efficiency and flexibility. The ADR440ARMZ also features a high output current capability, allowing it to drive heavy capacitive loads and multiple components on the same reference bus without degradation in performance.

Housed in a space-saving 8-lead MSOP package, this voltage reference is an ideal choice for a wide array of demanding applications. These include **precision data converters, medical imaging equipment, industrial and scientific instrumentation, optical network control systems, and high-accuracy test and measurement devices**. Its 4.096V output is particularly beneficial for driving 12-bit and higher-resolution ADCs that utilize a 4.096V full-scale input range, providing a perfect, low-noise bias point.

**ICGOOODFIND**: The ADR440ARMZ is a benchmark ultra-low-noise voltage reference that combines Analog Devices' advanced XFET® technology with a precision-tuned 4.096V output. Its exceptional noise performance, low drift, and robust design make it an indispensable component for engineers designing systems where accuracy and signal integrity cannot be compromised.

**Keywords**: Ultra-Low-Noise, XFET® Voltage Reference, 4.096V Output, High Accuracy, Precision Instrumentation.