The **ADA4091-4ACPZ-R2** is a high-precision, quad-channel operational amplifier manufactured by Analog Devices. It is specifically designed for applications requiring low power consumption and Over-the-Voltage (OTV) protection. --- ### ## 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the device: | Parameter | Specification | | :--- | :--- | | **Number of Channels** | 4 (Quad) | | **Supply Voltage (Single)** | 3V to 36V | | **Supply Voltage (Dual)** | ±1.5V to ±18V | | **Quatity Current (per amp)** | 250 μA | | **Gain Bandwidth Product** | 1.2 MHz | | **Offset Voltage (Max)** | 250 μV | | **Input Bias Current** | 60 nA | | **Package Type** | LFCSP-16 (3x3 mm) | --- ### ## 2. Core Functional Features * **Overvoltage Protection (OVP):** The device features integrated input protection. It can handle input voltages up to 12V above or below the supply rails without suffering from phase reversal or latch-up. * **Rail-to-Rail Output:** It allows the output signal to swing very close to the supply rails, maximizing the dynamic range. * **Micropower Operation:** Consuming only 250 μA per amplifier, it is ideal for battery-operated or thermally sensitive designs. * **High Precision:** Low offset voltage and low drift make it suitable for sensor signal conditioning where accuracy is critical. --- ### ## 3. Pin Configuration (LFCSP-16) While a physical diagram cannot be drawn, the functional mapping of the 16-lead frame chip scale package is generally as follows: | Pin Category | Description | | :--- | :--- | | **Inputs** | -IN (Inverting) and +IN (Non-inverting) for Amps A, B, C, and D. | | **Outputs** | Dedicated Output pins for each of the 4 amplifiers. | | **Power** | V+ (Positive Supply) and V- (Negative Supply/Ground). | | **Thermal Pad** | Must be connected to V- for electrical and thermal stability. | --- ### ## 4. Common Applications 1. **Industrial Process Control:** Used in 4-20 mA loops and PLC input modules. 2. **Battery Monitoring:** Low current draw makes it perfect for tracking battery health in portable electronics. 3. **Sensor Interfaces:** Buffering and amplifying signals from thermocouples, RTDs, and strain gauges. 4. **Power Supply Control Loops:** Providing feedback in DC-DC converters or linear regulators. --- ### ## 5. Ordering Information Code Breakdown * **ADA4091:** Part Family. * **4:** Quad Channel. * **ACPZ:** Package Type (LFCSP) and RoHS compliance. * **R2:** Reel size/Quantity (usually 250 units for small-scale production).