**The AD8273ARZ: A High-Performance, Low Power Difference Amplifier for Precision Signal Conditioning**

In the realm of precision analog electronics, accurately amplifying small differential signals buried in large common-mode noise is a fundamental challenge. The **AD8273ARZ from Analog Devices** stands out as a monolithic difference amplifier engineered specifically to meet this challenge, offering an exceptional blend of **high performance, versatility, and remarkably low power consumption**.

At its core, the AD8273ARZ integrates a precision op amp with a fully calibrated set of laser-trimmed resistors. This monolithic construction is pivotal, as it eliminates the mismatch issues inherent in discrete resistor-based solutions. The result is outstanding **dc performance with a maximum gain error of just ±0.02% and a common-mode rejection ratio (CMRR) of 90 dB (minimum)**. This high CMRR is crucial for rejecting noise and interference present on both input lines, ensuring the integrity of the desired differential signal.

Beyond its precision, the AD8273ARZ is designed for exceptional flexibility. It is configured as a **unity-gain difference amplifier** but can be easily adapted for a wide range of functions. By adding external resistors, it can be transformed into a high-performance instrumentation amplifier or used to create various gain configurations. This makes it an ideal building block for applications such as **bridge signal conditioning, current shunt monitoring, and level shifting in battery-powered systems**.

A defining characteristic of this component is its **low power operation, consuming a mere 85 µA of supply current**. This feature, combined with a wide supply voltage range from ±1.5 V to ±18 V, makes it perfectly suited for portable, handheld, and remote monitoring equipment where power budgets are severely constrained. Despite its low power draw, it does not sacrifice speed or functionality, supporting necessary bandwidth for many industrial and instrumentation needs.

The device is offered in a compact 8-lead SOIC package (the "ARZ" suffix), facilitating its use in space-sensitive PCB designs. Its robust design ensures high reliability across the industrial temperature range (-40°C to +125°C), catering to demanding environments from factory floors to automotive systems.

**ICGOO**

**DFIND**

In summary, the AD8273ARZ provides a superior integrated solution for differential signal amplification. It effectively replaces cumbersome discrete assemblies, offering designers a reliable, compact, and power-efficient component that delivers precision and stability, thereby simplifying design and enhancing system performance.

**Keywords:** Difference Amplifier, Low Power, High CMRR, Precision Signal Conditioning, Gain Error