The **AD8202YRZ-R7** is a high-precision, single-supply difference amplifier designed by Analog Devices. It is specifically engineered to amplify small differential voltages in the presence of high common-mode voltages. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Type** | Difference Amplifier | | **Common-Mode Voltage Range** | -8V to +28V (at 5V supply) | | **Supply Voltage Range** | 3.5V to 12V | | **Gain** | Fixed at 10 V/V | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 8-SOIC (0.154", 3.90mm Width) | | **CMRR (Min)** | 80 dB (DC to 10 kHz) | | **Packaging** | Tape & Reel (R7) | --- ### 2. Functional Description The AD8202 is optimized for **current sensing** applications. Its internal architecture allows it to handle voltages at its input pins that are significantly higher or lower than its own power supply voltage. #### Core Features: * **High Common-Mode Rejection:** It effectively ignores high-voltage noise or fluctuations on the lines, focusing only on the voltage drop across a shunt resistor. * **Fixed Gain:** The internal resistors are laser-trimmed to provide a precise gain of 10, ensuring high accuracy without external components. * **Automotive Qualified:** The "Y" in the part number often indicates a high-temperature grade suitable for harsh environments like engine compartments. --- ### 3. Pin Configuration (8-SOIC) | Pin # | Name | Function | | :--- | :--- | :--- | | 1 | -IN | Inverting Input | | 2 | GND | Ground | | 3 | REF | Reference Voltage (Sets the output offset) | | 4 | NC | No Connection | | 5 | OUT | Output Signal | | 6 | +VS | Positive Supply | | 7 | NC | No Connection | | 8 | +IN | Non-inverting Input | --- ### 4. Typical Applications The AD8202 is widely used in systems where current monitoring is critical: * **Motor Control:** Monitoring phase currents in BLDC motors. * **Transmission Control:** Solenoid current sensing. * **Battery Management Systems (BMS):** Measuring charge and discharge currents. * **Power Steering:** Precision feedback loops in EPS systems. --- ### 5. Part Number Breakdown (AD8202YRZ-R7) * **AD8202:** Base model number. * **Y:** Operating temperature range (-40°C to +125°C). * **R:** Package type (SOIC). * **Z:** RoHS compliant (Lead-free). * **R7:** Packaging format (7-inch Reel, typically containing 1,000 units).