The **AD8548ARZ-R7** is a high-performance, micropower, CMOS operational amplifier manufactured by Analog Devices. It is specifically designed for low-power applications where battery life and precision are critical. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the AD8548ARZ-R7: | Parameter | Specification | | :--- | :--- | | **Number of Channels** | 4 (Quad Op-Amp) | | **Supply Voltage (Range)** | 2.7 V to 18 V (or ±1.35 V to ±9 V) | | **Supply Current (per Amp)** | 18 µA (Maximum) | | **Gain Bandwidth Product** | 1 MHz | | **Slew Rate** | 0.4 V/µs | | **Input Bias Current** | 4 pA | | **Output Type** | Rail-to-Rail | | **Package Type** | SOIC-14 | --- ### 2. Core Features * **Micropower Operation:** Consuming only 18 µA per amplifier, it is ideal for "always-on" battery-powered sensors. * **High Voltage Range:** Unlike many CMOS op-amps limited to 5V, this part can operate up to 18V, allowing for greater dynamic range. * **Rail-to-Rail Input/Output (RRIO):** The output can swing very close to the supply rails, maximizing the signal-to-noise ratio in low-voltage systems. * **Low Input Bias Current:** The CMOS input stage results in extremely low leakage, making it suitable for high-impedance photodiode sensors or long-duration integrators. --- ### 3. Pinout Configuration (SOIC-14) The AD8548ARZ-R7 follows the standard quad op-amp pinout: | Pin Number | Function | Description | | :--- | :--- | :--- | | 1, 7, 8, 14 | **OUT A, B, C, D** | Output pins for each of the 4 amplifiers | | 2, 6, 9, 13 | **-IN A, B, C, D** | Inverting inputs | | 3, 5, 10, 12 | **+IN A, B, C, D** | Non-inverting inputs | | 4 | **V+** | Positive Supply Voltage | | 11 | **V-** | Negative Supply Voltage (or Ground) | --- ### 4. Typical Applications 1. **Portable Medical Instrumentation:** ECG/EKG monitors and glucose meters. 2. **Remote Sensors:** Gas detectors or environmental monitors powered by coin-cell batteries. 3. **Active Filters:** Low-frequency filtering in power-sensitive hardware. 4. **Transimpedance Amplifiers:** Converting low currents from photodiodes into measurable voltages. --- ### 5. Part Number Breakdown * **AD8548**: The base model number. * **A**: Performance grade (Standard). * **RZ**: Package identifier (SOIC - RoHS compliant). * **R7**: Packaging format (7-inch Reel, containing 1,000 units).