**AD8211YRJZ-RL: A High Common-Mode Voltage, Current-Shunt Monitor from Analog Devices**

In the realm of precision measurement and control systems, accurately monitoring current is a fundamental requirement across applications ranging from industrial motor controls and power supplies to automotive battery management. The **AD8211YRJZ-RL** from Analog Devices stands out as a specialized solution engineered precisely for this critical task. This current-shunt monitor is designed to extract a small differential voltage signal developed across a sense resistor (shunt) placed in series with a load, even when this resistor is riding on a high common-mode voltage.

The core challenge in such high-side or low-side current sensing scenarios is the presence of a large, fluctuating common-mode voltage that can easily overwhelm the small differential signal of interest. The AD8211YRJZ-RL excels here by featuring an **impressive common-mode voltage range of -2V to +65V**, which is independent of the supply voltage. This allows it to operate accurately in environments where the shunt resistor's voltage is far from ground, a common situation in 48V automotive systems or industrial power buses.

Functionally, the device amplifies the small differential voltage across the shunt resistor with a fixed gain of **20 V/V**. This gain is achieved through a precision internal trimmed resistor network, ensuring high accuracy and stability over the entire temperature range (-40°C to +125°C). The output is a ground-referenced voltage that is easy for a downstream analog-to-digital converter (ADC) or microcontroller to digitize and process. Key performance parameters include a **low initial offset voltage of typically 100 µV** and a **excellent common-mode rejection ratio (CMRR) of 90 dB (min) at DC**, which are crucial for minimizing measurement errors.

Housed in a compact, 8-lead SOIC package, the AD8211YRJZ-RL is optimized for space-constrained applications. Its **wide supply voltage range of 3.0V to 5.5V** makes it highly versatile and easy to integrate into various system architectures. The ‘-RL’ suffix indicates it is supplied on a tape and reel, catering to automated high-volume assembly processes.

**ICGOODFIND**: The AD8211YRJZ-RL is an optimal choice for engineers seeking a robust, high-performance, and easy-to-use solution for **high-side current sensing** in demanding environments. Its ability to accurately resolve small shunt voltages atop high common-mode voltages, combined with its integrated design and fixed gain, simplifies circuit design, reduces component count, and enhances overall system reliability.

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