The **AD8665ARJZ-R2** is a high-precision, low-noise CMOS operational amplifier manufactured by Analog Devices. It is specifically designed for low-voltage applications that require high accuracy and rail-to-rail performance. --- ## 1. Technical Specifications The following table summarizes the key electrical characteristics of the AD8665: | Parameter | Specification | | :--- | :--- | | **Type** | Single CMOS Operational Amplifier | | **Supply Voltage (Single)** | 5V to 16V | | **Supply Voltage (Dual)** | ±2.5V to ±8V | | **Bandwidth (Gain Bandwidth Product)** | 4 MHz | | **Slew Rate** | 3.5 V/µs | | **Offset Voltage (Max)** | 750 µV | | **Input Bias Current (Max)** | 1 pA | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | SOT-23-5 (RJ-5) | --- ## 2. Key Features and Benefits * **Rail-to-Rail Input/Output:** It can handle signals across the entire power supply range, maximizing dynamic range in low-voltage systems. * **Low Input Bias Current:** With a typical bias current in the picoampere (pA) range, it is ideal for photodiode transimpedance amplifiers and high-impedance sensors. * **Low Noise:** Provides high signal integrity, which is essential for precision measurement and audio processing. * **DigiReel Packaging:** The suffix "-R2" indicates the component is supplied on a 7-inch reel (250 units), commonly used for automated SMT (Surface Mount Technology) assembly. --- ## 3. Pin Configuration (SOT-23-5) The AD8665ARJZ uses a standard 5-lead SOT-23 pinout: | Pin Number | Signal Name | Description | | :--- | :--- | :--- | | 1 | **OUT** | Output of the amplifier | | 2 | **V-** | Negative supply voltage (or Ground) | | 3 | **+IN** | Non-inverting input | | 4 | **-IN** | Inverting input | | 5 | **V+** | Positive supply voltage | --- ## 4. Common Applications Due to its high precision and low power consumption, the AD8665 is frequently used in: 1. **Sensor Interfaces:** Amplifying signals from pressure, temperature, and light sensors. 2. **Medical Instrumentation:** Low-power EKG/ECG monitoring devices. 3. **Portable Devices:** Battery-powered equipment requiring rail-to-rail operation. 4. **Data Acquisition:** Buffering inputs for Analog-to-Digital Converters (ADCs).