## Overview of AD8667ARMZ-R2 The **AD8667ARMZ-R2** is a high-precision, dual-channel, rail-to-rail output operational amplifier manufactured by **Analog Devices**. It is part of the DigiTrim® technology family, which offers low offset voltage and low drift over temperature. --- ### Technical Specifications The following table outlines the primary electrical characteristics of the AD8667ARMZ-R2: | Parameter | Specification | | :--- | :--- | | **Number of Channels** | Dual (2) | | **Supply Voltage (Single)** | 5V to 16V | | **Supply Voltage (Dual)** | ±2.5V to ±8V | | **Input Offset Voltage** | 600 µV (Maximum) | | **Input Bias Current** | 1 pA (Typical) | | **Bandwidth (Gain Bandwidth Product)** | 540 kHz | | **Slew Rate** | 0.25 V/µs | | **Output Type** | Rail-to-Rail | | **Package Type** | MSOP-8 (ARMZ) | | **Operating Temperature** | -40°C to +125°C | --- ### Key Features and Benefits * **Low Input Bias Current:** Utilizing CMOS inputs, it has an extremely low bias current (typical 1 pA), making it ideal for photodiode preamps or high-impedance sensors. * **Rail-to-Rail Output:** The output can swing very close to the supply rails, maximizing dynamic range in low-voltage systems. * **Low Power Consumption:** Each amplifier draws only about 230 µA, making it suitable for battery-powered applications. * **DigiTrim® Technology:** This proprietary technology ensures high accuracy by trimming the offset voltage at the wafer level. --- ### Typical Applications 1. **Sensor Interfaces:** Amplifying signals from high-impedance sensors. 2. **Photodiode Preamps:** Due to the low input bias current. 3. **Precision Filters:** Active low-pass or high-pass filters in industrial equipment. 4. **Medical Instrumentation:** Low-power, high-precision monitoring devices. 5. **Battery Powered Equipment:** Handheld meters and portable diagnostic tools. --- ### Pin Configuration (MSOP-8) | Pin Number | Mnemonic | Function | | :--- | :--- | :--- | | 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 Supply or Ground | | 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 Supply Voltage | ---