## Overview of the AD8065ART-R2 The **AD8065ART-R2** is a high-performance, voltage feedback operational amplifier (Op-Amp) belonging to the **FastFET™** family by Analog Devices. It is designed to offer a combination of high speed, high input impedance, and low noise, making it ideal for precision high-speed signal conditioning. --- ### 1. Key Technical Specifications | Parameter | Value / Description | | :--- | :--- | | **Architecture** | FET Input (FastFET™) | | **Bandwidth (-3 dB)** | 145 MHz | | **Slew Rate** | 180 V/µs | | **Input Bias Current** | 1 pA (Typical) | | **Supply Voltage Range** | 5 V to 24 V (Single) / ±2.5 V to ±12 V (Dual) | | **Settling Time** | 55 ns to 0.1% | | **Output Type** | Rail-to-Rail | | **Package Type** | SOT-23-5 (indicated by "ART") | --- ### 2. Detailed Component Analysis #### A. Input Stage (FET Technology) The "FastFET" technology utilizes a proprietary junction field-effect transistor (JFET) input stage. This results in: * **Extremely Low Bias Current:** At ~1 pA, it minimizes errors when interfacing with high-impedance sensors or photodiode circuits. * **Low Noise:** It offers low voltage noise (7 nV/√Hz) and very low current noise (0.6 fA/√Hz). #### B. Dynamic Performance With a **145 MHz bandwidth** and **180 V/µs slew rate**, the AD8065 is capable of handling fast pulses and high-frequency AC signals without significant distortion. #### C. Supply Flexibility Unlike many high-speed Op-Amps that are restricted to 5V or 12V, the AD8065 supports up to **24V total supply**. This allows for a much wider dynamic range and higher output voltage swings. --- ### 3. Part Number Breakdown (AD8065ART-R2) | Part Suffix | Meaning | | :--- | :--- | | **AD8065** | Base model number (Single Op-Amp version) | | **ART** | Package Identifier: SOT-23 (Small Outline Transistor), 5-lead | | **R2** | Packing Method: 7-inch Tape and Reel (usually 250 or 500 units) | --- ### 4. Typical Applications * **Photodiode Amplifiers:** Due to ultra-low input bias current. * **ADC Drivers:** Buffering high-speed Analog-to-Digital converters. * **Active Filters:** High-order filters requiring high GBW (Gain Bandwidth Product). * **Professional Audio:** Low distortion and high voltage rails. --- ### 5. Simplified Pinout (SOT-23-5) ```text SOT-23-5 +-------+ OUT --| 1 5 |-- V+ V- --| 2 | +IN --| 3 4 |-- -IN +-------+ ```