## Technical Overview of AD8293G80ARJZ-R2 The **AD8293G80ARJZ-R2** is a precision instrumentation amplifier manufactured by Analog Devices. It is specifically designed for high-gain, low-power applications where space is at a premium and signal accuracy is critical. --- ### Key Specifications | Parameter | Specification | | :--- | :--- | | **Type** | Instrumentation Amplifier | | **Gain (Fixed)** | 80 V/V | | **Input Offset Voltage** | 10 µV (max) | | **Gain Drift** | 50 ppm/°C (max) | | **Supply Voltage Range** | 1.8V to 5.5V | | **Supply Current** | 13 µA (typical) | | **Package Type** | SOT-23-8 | | **Operating Temperature** | -40°C to +125°C | --- ### Core Functional Features 1. **Fixed Gain Configuration:** The "80" in the part number indicates a factory-set fixed gain of **80**. Because the resistors are integrated on-chip, the device offers superior gain accuracy and temperature stability compared to amplifiers using external gain-setting resistors. 2. **Zero-Drift Architecture:** It utilizes a "chopper-stabilized" or zero-drift architecture. This virtually eliminates offset voltage and 1/f noise (flicker noise), making it ideal for measuring small DC signals over time. 3. **Micropower Consumption:** With a typical current draw of only 13 µA, this part is optimized for battery-powered medical devices and remote sensors. 4. **Rail-to-Rail Output:** The output can swing very close to the supply rails, maximizing the dynamic range for low-voltage ADC (Analog-to-Digital Converter) interfacing. --- ### Typical Applications * **Medical Instrumentation:** ECG/EKG monitors and pulse oximeters. * **Precision Data Acquisition:** Interfacing with bridge-type sensors (pressure, strain gauges). * **Battery Monitoring:** High-side current sensing in portable electronics. * **Industrial Process Control:** Low-power sensor transmitters. --- ### Pin Configuration (SOT-23-8) ```text Pin 1: -IN (Inverting Input) Pin 2: +IN (Non-Inverting Input) Pin 3: V- (Negative Supply) Pin 4: REF (Reference Input) Pin 5: OUT (Output) Pin 6: V+ (Positive Supply) Pin 7: NC (No Connect) Pin 8: NC (No Connect) ```