## Overview of OP282ARMZ-R2 The **OP282ARMZ-R2** is a high-precision, dual-channel operational amplifier manufactured by Analog Devices. It belongs to the JFET-input family, known for its extremely low input bias current and high input impedance. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the OP282 series: | Parameter | Specification | | :--- | :--- | | **Number of Channels** | Dual (2) | | **Input Type** | JFET-Input | | **Supply Voltage (Range)** | ±4.5V to ±18V | | **Input Bias Current** | 3 pA (Typical) | | **Slew Rate** | 9 V/µs | | **Gain Bandwidth Product** | 4 MHz | | **Package / Case** | MSOP-8 (ARMZ designation) | | **Operating Temperature** | -40°C to +85°C | --- ### 2. Core Features and Benefits * **Low Input Bias Current:** Because it uses JFET technology, the input current is in the picoampere (pA) range. This makes it ideal for applications involving high-impedance sensors. * **High Slew Rate:** With a rate of 9 V/µs, it can respond quickly to rapid changes in input signals, making it suitable for high-speed signal processing. * **Low Power Consumption:** It draws approximately 210 µA of supply current per amplifier, which is beneficial for power-sensitive designs. * **Unity-Gain Stability:** The amplifier remains stable when configured for a gain of 1. --- ### 3. Pin Configuration (MSOP-8) The OP282ARMZ-R2 uses the standard dual op-amp pinout: 1. **OUT A:** Output of Channel A 2. **-IN A:** Inverting Input of Channel A 3. **+IN A:** Non-Inverting Input of Channel A 4. **V-:** Negative Power Supply 5. **+IN B:** Non-Inverting Input of Channel B 6. **-IN B:** Inverting Input of Channel B 7. **OUT B:** Output of Channel B 8. **V+:** Positive Power Supply --- ### 4. Common Applications Due to its high precision and high input impedance, it is frequently used in: * **Photodiode Preamps:** Converting low-current light signals into voltage. * **Instrumentation:** Signal conditioning for sensors. * **Active Filters:** High-order filters requiring precise components. * **Battery-Powered Equipment:** Where low quiescent current is necessary. --- ### 5. Part Number Breakdown * **OP282:** The base model number (Dual JFET Op-Amp). * **ARMZ:** Indicates the package type (MSOP-8) and RoHS compliance. * **R2:** Indicates the packaging format (7-inch Reel, typically 250 units).