Current Sense Amplifiers

AD8210YRZ

AD8210YRZ - High Voltage Bidirectional Current Shunt Monitor | Analog Devices

The AD8210YRZ is a high voltage, bidirectional current shunt monitor from Analog Devices, designed to amplify small differential voltages in the presence of large common-mode voltages. It operates from a single 5 V supply and features an input common-mode voltage range from -2 V to +65 V, making it ideal for high-side and low-side current sensing in automotive, industrial, and power management applications. The device is available in an 8-pin SOIC package and provides a 5 mA output current capability. A current shunt monitor is a specialized difference amplifier that measures the voltage drop across a sense resistor to determine load current. It is a critical component in power management systems, enabling precise current monitoring for battery management, motor control, and load protection. The AD8210 belongs to the family of current sense amplifiers, which are essential for closed-loop control and diagnostic functions in modern electronic systems. Key features of the AD8210YRZ include a wide common-mode input range, bidirectional current sensing capability, and excellent AC and DC performance. The device offers a typical supply current of 2 mA and a bandwidth of 450 kHz, ensuring accurate measurement of dynamic currents. Its high CMRR (typically 120 dB) rejects common-mode noise, making it suitable for noisy industrial environments. The AD8210 uses a precision difference amplifier architecture with an external shunt resistor, allowing flexible gain configuration. The output is referenced to a programmable level, enabling bidirectional current detection. The device includes an input filter to reduce high-frequency noise and supports both high-side and low-side sensing configurations. Typical applications include motor control, battery monitoring, power supply diagnostics, and load current sensing in automotive systems. The wide common-mode range and bidirectional capability make it particularly useful for H-bridge motor drivers and battery charge/discharge monitoring. When designing with the AD8210YRZ, ensure the shunt resistor is placed close to the load and the input filter components are optimized for the desired bandwidth. The output reference pins allow adjustment of the output voltage level, which is essential for interfacing with ADCs or comparators.