The **AD8211WYRJZ-R7** is a high-precision, high-voltage, current-shunt amplifier designed primarily for automotive and industrial applications. It is manufactured by Analog Devices and is engineered to amplify small differential voltages in the presence of high common-mode voltages. --- ### ## Technical Specifications Overview | Parameter | Specification | | :--- | :--- | | **Manufacturer** | Analog Devices Inc. | | **Part Number** | AD8211WYRJZ-R7 | | **Package Type** | SOT-23-5 (RJZ) | | **Fixed Gain** | 20 V/V | | **Common-Mode Voltage Range** | -2V to +65V | | **Operating Temperature** | -40°C to +125°C | | **Bandwidth** | 500 kHz | | **Supply Voltage** | 4.5V to 5.5V | | **Grade** | Automotive (AEC-Q100 Qualified) | --- ### ### Key Electronic Characteristics #### 1. High Common-Mode Rejection (CMRR) The device is designed to detect current through a shunt resistor even when the voltage on that resistor is significantly higher than the supply voltage of the amplifier. It can handle up to **65V** on the input pins while running on a standard **5V** rail. #### 2. Fixed Gain Architecture The AD8211 features an internal, laser-trimmed resistor network that sets a fixed gain of **20**. This eliminates the need for external gain-setting resistors, reducing the total footprint and improving accuracy across temperature fluctuations. #### 3. Zero-Drift Capability The amplifier is optimized to maintain low offset voltage drift, ensuring that current measurements remain accurate even as the engine or industrial environment heats up. --- ### ### Typical Application Circuit The AD8211 is typically placed in a "High-Side" current sensing configuration. ```mermaid graph LR A[Power Supply] --> B(Shunt Resistor) B --> C[Load/Motor] B -- "In+" --> D{AD8211} B -- "In-" --> D D -- "Output" --> E[Microcontroller ADC] ``` --- ### ### Use Cases * **Transmission Control:** Monitoring solenoids and valves. * **Motor Control:** Phase current sensing in BLDC motors. * **Battery Management:** Monitoring charge/discharge cycles in EV batteries. * **Engine Management:** Fuel injection system monitoring. ---