**AD8213WHRMZ: A High-Performance, High Common-Mode Voltage Difference Amplifier for Precision Current Sensing**

In the realm of industrial automation, motor control, and power management systems, **accurate current sensing** is a fundamental requirement for ensuring efficiency, safety, and system reliability. The AD8213WHRMZ from Analog Devices stands out as a premier solution, engineered to deliver exceptional performance in demanding applications where high common-mode voltages are present.

This specialized difference amplifier is designed to amplify a small differential voltage developed across a current-sensing shunt resistor, which is typically submerged in a high common-mode voltage. The AD8213WHRMZ excels in this environment, capable of rejecting common-mode voltages from **-2 V to +65 V**, independent of the supply voltage. This remarkable feature allows it to operate accurately in the presence of large voltage swings, such as those found in automotive battery systems, industrial motor drives, and multi-phase power supplies.

The device boasts a fixed gain of 20 V/V, providing a **highly stable and precise amplification** of the shunt resistor's millivolt-level signal. This stability is critical, as it is maintained over a wide temperature range (-40°C to +125°C), ensuring consistent performance in harsh operating environments. The output is referenced to ground, simplifying the interface with analog-to-digital converters (ADCs) or microcontroller units (MCUs) for subsequent processing and control decisions.

A key attribute of the AD8213WHRMZ is its **excellent common-mode rejection ratio (CMRR)**, which minimizes errors caused by noise and fluctuations on the high-voltage bus. This results in a cleaner, more accurate representation of the load current. Furthermore, its **low offset voltage and low offset drift** contribute to highly accurate measurements across both time and temperature, minimizing zero-current error and enhancing the overall precision of the sensing system.

Housed in a compact, 8-lead SOIC package, the AD8213WHRMZ offers a robust and space-efficient solution for board-level designs, making it an ideal choice for a wide array of precision current sensing applications.

**ICGOOODFIND:** The AD8213WHRMZ is an exceptional difference amplifier that sets a high standard for precision current sensing. Its ability to accurately amplify small signals in the presence of very high common-mode voltages, combined with its outstanding temperature stability and high CMRR, makes it an indispensable component for designers building reliable and efficient high-performance systems.

**Keywords:** Precision Current Sensing, High Common-Mode Voltage, Difference Amplifier, Common-Mode Rejection Ratio (CMRR), Shunt Resistor.