**AD8219BRMZ: A High Common-Mode Voltage, Current-Shunt Monitor**

In the realm of precision electronics, accurately measuring current in systems with high common-mode voltages is a significant challenge. The **AD8219BRMZ from Analog Devices** stands out as a dedicated current-shunt monitor engineered specifically to address this demanding requirement. This device excels in applications where precise current sensing is critical, such as in motor controls, power management systems, and industrial automation, by providing a high-performance, integrated solution.

The core strength of the AD8219BRMZ lies in its ability to **accurately amplify a small differential voltage** developed across a current-shunt resistor, even when this resistor is sitting at a high common-mode voltage far removed from ground. It can handle common-mode voltages from **-2 V to +65 V**, which is independent of the supply voltage. This remarkable feature allows it to function in high-side current sensing configurations in systems like 48V automotive battery arrays or industrial motor drives, where the shunt resistor is placed between the power supply and the load.

Functionally, the AD8219BRMZ provides a fixed gain of 20 V/V. The output is a ground-referenced voltage that is proportional to the current flowing through the external shunt resistor. This **buffered output** can be directly interfaced with an analog-to-digital converter (ADC) of a microcontroller or other monitoring circuitry, simplifying system design. Furthermore, the device operates over a wide supply range of 3.0 V to 5.5 V, making it versatile for various logic levels and system voltages.

Key to its precision are its **excellent DC performance characteristics**. The AD8219BRMZ boasts a very low initial offset voltage and a high common-mode rejection ratio (CMRR), which minimizes errors caused by fluctuations in the high common-mode voltage. Its integrated design offers superior temperature stability compared to discrete op-amp solutions, ensuring consistent and reliable measurements across the entire operating temperature range.

Housed in a compact **8-lead MSOP package**, the AD8219BRMZ offers a space-efficient solution without compromising on performance or robustness. This small form factor is ideal for modern, densely packed PCB designs where board real estate is at a premium.

In summary, the AD8219BRMZ is a highly specialized and reliable component that simplifies the complex task of high-side current sensing. Its ability to deliver precision and stability in electrically noisy environments with high common-mode voltages makes it an indispensable tool for power-conscious and safety-critical designs.

**ICGOOODFIND:** The AD8219BRMZ is an exceptional current-shunt monitor that provides **high accuracy, robust performance in high common-mode voltage environments, and a compact form factor**, making it a top choice for advanced industrial and automotive applications.

**Keywords:** Current Shunt Monitor, High Common-Mode Voltage, Precision Measurement, Differential Amplifier, Motor Control.