The **ADA4841-2YRZ-R7** is a high-performance, dual-channel, low-power, rail-to-rail output operational amplifier (op-amp) manufactured by Analog Devices. It is specifically designed for high-resolution data acquisition systems where power consumption and noise performance are critical. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Channels** | 2 (Dual Op-Amp) | | **Bandwidth (-3 dB)** | 80 MHz | | **Slew Rate** | 30 V/µs | | **Voltage Noise** | 2.1 nV/√Hz (at 100 kHz) | | **Current Noise** | 1.4 pA/√Hz (at 100 kHz) | | **Supply Voltage Range** | 2.7 V to 12 V (Single or Dual) | | **Supply Current** | 1.1 mA per amplifier | | **Package Type** | SOIC-8 (Narrow) | --- ### 2. Functional Features * **Low Noise & Low Distortion:** With only 2.1 nV/√Hz of voltage noise and high linearity, it is ideal for driving 16-bit to 18-bit ADCs (Analog-to-Digital Converters). * **Rail-to-Rail Output:** The output can swing very close to the supply rails, maximizing the dynamic range of the signal. * **Low Power Consumption:** Despite its high speed (80 MHz), it consumes only 1.1 mA per channel, making it suitable for battery-powered or portable instruments. * **Input Offset Voltage:** It features a very low input offset voltage (typ. 40 µV), which minimizes DC errors in precision circuits. --- ### 3. Pin Configuration (SOIC-8) The device follows the industry-standard pinout for dual op-amps: | Pin Number | Function | Description | | :--- | :--- | :--- | | 1 | **OUT A** | Output of Amplifier A | | 2 | **-IN A** | Inverting Input of Amplifier A | | 3 | **+IN A** | Non-inverting Input of Amplifier A | | 4 | **V-** | Negative Supply (or Ground) | | 5 | **+IN B** | Non-inverting Input of Amplifier B | | 6 | **-IN B** | Inverting Input of Amplifier B | | 7 | **OUT B** | Output of Amplifier B | | 8 | **V+** | Positive Supply | --- ### 4. Typical Applications 1. **ADC Drivers:** Acts as a buffer or gain stage for high-precision ADCs (like the AD7685 or AD7982). 2. **Portable Instrumentation:** Due to its low power-to-performance ratio. 3. **Active Filters:** Used in high-order filters where low noise and high bandwidth are required. 4. **DAC Buffers:** Used at the output of Digital-to-Analog converters to provide signal conditioning. --- ### 5. Part Number Breakdown * **ADA4841:** Device family name. * **-2:** Indicates the number of channels (Dual). * **YRZ:** Package code (SOIC_N) and temperature range (industrial). * **R7:** Packaging format (7-inch Reel, usually 1,000 units). ---